Gentoo update for Mozilla Firefox



Published: 2021-05-01
Risk High
Patch available YES
Number of vulnerabilities 27
CVE-ID CVE-2021-23961
CVE-2021-23968
CVE-2021-23969
CVE-2021-23970
CVE-2021-23971
CVE-2021-23972
CVE-2021-23973
CVE-2021-23974
CVE-2021-23975
CVE-2021-23976
CVE-2021-23977
CVE-2021-23978
CVE-2021-23981
CVE-2021-23982
CVE-2021-23983
CVE-2021-23984
CVE-2021-23985
CVE-2021-23986
CVE-2021-23987
CVE-2021-23988
CVE-2021-23994
CVE-2021-23995
CVE-2021-23998
CVE-2021-23999
CVE-2021-24002
CVE-2021-29945
CVE-2021-29946
CWE-ID CWE-200
CWE-358
CWE-617
CWE-254
CWE-451
CWE-79
CWE-399
CWE-264
CWE-367
CWE-119
CWE-125
CWE-787
CWE-416
CWE-277
CWE-20
CWE-682
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Gentoo Linux
Operating systems & Components / Operating system

Vendor Gentoo

Security Bulletin

This security bulletin contains information about 27 vulnerabilities.

1) Information disclosure

EUVDB-ID: #VU50030

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-23961

CWE-ID: CWE-200 - Information Exposure

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to the way Firefox handles requests to internal resources. A remote attacker can create a specially crafted web page and combined with slipstream research techniques collect information about hosts in internal network as well as services running on the user's local machine.

Mitigation

Update the affected packages.
www-client/firefox to version: 88.0
www-client/firefox-bin to version: 88.0

Vulnerable software versions

Gentoo Linux: All versions


CPE2.3 External links

http://security.gentoo.org/
http://security.gentoo.org/glsa/202104-10

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

2) Improperly implemented security check for standard

EUVDB-ID: #VU50881

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-23968

CWE-ID: CWE-358 - Improperly Implemented Security Check for Standard

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to incorrect implementation of W3C Content Security Policy. If Content Security Policy blocked frame navigation, the full destination of a redirect served in the frame was reported in the violation report; as opposed to the original frame URI. A remote attacker can gain knowledge of sensitive information contained in such URIs.

Mitigation

Update the affected packages.
www-client/firefox to version: 88.0
www-client/firefox-bin to version: 88.0

Vulnerable software versions

Gentoo Linux: All versions


CPE2.3 External links

http://security.gentoo.org/
http://security.gentoo.org/glsa/202104-10

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

3) Improperly implemented security check for standard

EUVDB-ID: #VU50879

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-23969

CWE-ID: CWE-358 - Improperly Implemented Security Check for Standard

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to incorrect implementation of W3C Content Security Policy. Under certain types of redirects Firefox incorrectly sets the source file to be the destination of the redirects. A remote attacker can gain knowledge of the destination URL.

Mitigation

Update the affected packages.
www-client/firefox to version: 88.0
www-client/firefox-bin to version: 88.0

Vulnerable software versions

Gentoo Linux: All versions


CPE2.3 External links

http://security.gentoo.org/
http://security.gentoo.org/glsa/202104-10

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

4) Reachable Assertion

EUVDB-ID: #VU50880

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-23970

CWE-ID: CWE-617 - Reachable Assertion

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to a reachable assertion in multithreaded wasm code, when validating separation of script domains. A remote attacker can create a specially crafted web page, trick the victim into visiting it, trigger an assertion failure and bypass implemented security restrictions.

Mitigation

Update the affected packages.
www-client/firefox to version: 88.0
www-client/firefox-bin to version: 88.0

Vulnerable software versions

Gentoo Linux: All versions


CPE2.3 External links

http://security.gentoo.org/
http://security.gentoo.org/glsa/202104-10

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

5) Security features bypass

EUVDB-ID: #VU50883

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-23971

CWE-ID: CWE-254 - Security Features

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to an error when processing a redirect with a conflicting Referrer-Policy. The browser adopts redirect's Referrer-Policy, which may result in disclosure of more information than intended by the original origin.

Mitigation

Update the affected packages.
www-client/firefox to version: 88.0
www-client/firefox-bin to version: 88.0

Vulnerable software versions

Gentoo Linux: All versions


CPE2.3 External links

http://security.gentoo.org/
http://security.gentoo.org/glsa/202104-10

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

6) Spoofing attack

EUVDB-ID: #VU50886

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-23972

CWE-ID: CWE-451 - User Interface (UI) Misrepresentation of Critical Information (Clickjacking, spoofing)

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to incorrect processing of cached redirects with HTTP authentication. A remote attacker can force the browser not to display a phishing warning dialog, if the malicious website was previously cached by the browser.

Mitigation

Update the affected packages.
www-client/firefox to version: 88.0
www-client/firefox-bin to version: 88.0

Vulnerable software versions

Gentoo Linux: All versions


CPE2.3 External links

http://security.gentoo.org/
http://security.gentoo.org/glsa/202104-10

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

7) Information disclosure

EUVDB-ID: #VU50888

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-23973

CWE-ID: CWE-200 - Information Exposure

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output via a decoding error, when trying to load a cross-origin resource in an audio/video context. A remote attacker can gain access to information about the resource.

Mitigation

Update the affected packages.
www-client/firefox to version: 88.0
www-client/firefox-bin to version: 88.0

Vulnerable software versions

Gentoo Linux: All versions


CPE2.3 External links

http://security.gentoo.org/
http://security.gentoo.org/glsa/202104-10

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

8) Cross-site scripting

EUVDB-ID: #VU50882

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-23974

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data. The DOMParser API did not properly process <noscript> elements for escaping. A remote attacker can bypass HTML Sanitizer and perform XSS attacks.

Mitigation

Update the affected packages.
www-client/firefox to version: 88.0
www-client/firefox-bin to version: 88.0

Vulnerable software versions

Gentoo Linux: All versions


CPE2.3 External links

http://security.gentoo.org/
http://security.gentoo.org/glsa/202104-10

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

9) Resource management error

EUVDB-ID: #VU50887

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-23975

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The developer page about:memory has a Measure function for exploring what object types the browser has allocated and their sizes. When this function was invoked, the browser called the sizeof function instead of using the API method that checks for invalid pointers.

Mitigation

Update the affected packages.
www-client/firefox to version: 88.0
www-client/firefox-bin to version: 88.0

Vulnerable software versions

Gentoo Linux: All versions


CPE2.3 External links

http://security.gentoo.org/
http://security.gentoo.org/glsa/202104-10

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

10) Security restrictions bypass

EUVDB-ID: #VU50884

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-23976

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a local application to escalate privileges on the system.

When accepting a malicious intent from other installed apps, Firefox for Android accepted manifests from arbitrary file paths and allowed declaring webapp manifests for other origins. This could be used to gain fullscreen access for UI spoofing and could also lead to cross-origin attacks on targeted websites.

Mitigation

Update the affected packages.
www-client/firefox to version: 88.0
www-client/firefox-bin to version: 88.0

Vulnerable software versions

Gentoo Linux: All versions


CPE2.3 External links

http://security.gentoo.org/
http://security.gentoo.org/glsa/202104-10

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

11) Race condition

EUVDB-ID: #VU50885

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-23977

CWE-ID: CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition

Exploit availability: No

Description

The vulnerability allows a malicious application to read sensitive information.

The vulnerability exists due to a race condition. A local application can read sensitive data from Firefox directories.

Mitigation

Update the affected packages.
www-client/firefox to version: 88.0
www-client/firefox-bin to version: 88.0

Vulnerable software versions

Gentoo Linux: All versions


CPE2.3 External links

http://security.gentoo.org/
http://security.gentoo.org/glsa/202104-10

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

12) Buffer overflow

EUVDB-ID: #VU50889

Risk: High

CVSSv3.1:

CVE-ID: CVE-2021-23978

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when processing HTML content. A remote attacker can create a specially crafted webpage, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update the affected packages.
www-client/firefox to version: 88.0
www-client/firefox-bin to version: 88.0

Vulnerable software versions

Gentoo Linux: All versions


CPE2.3 External links

http://security.gentoo.org/
http://security.gentoo.org/glsa/202104-10

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

13) Out-of-bounds read

EUVDB-ID: #VU51661

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-23981

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition during texture upload of a Pixel Buffer Object in WebGL. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger out-of-bounds read error and read contents of memory on the system.

Mitigation

Update the affected packages.
www-client/firefox to version: 88.0
www-client/firefox-bin to version: 88.0

Vulnerable software versions

Gentoo Linux: All versions


CPE2.3 External links

http://security.gentoo.org/
http://security.gentoo.org/glsa/202104-10

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

14) Information disclosure

EUVDB-ID: #VU51662

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-23982

CWE-ID: CWE-200 - Information Exposure

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to the way Firefox handles requests to internal hosts. Using techniques that built on the slipstream research, a malicious webpage could have scanned both an internal network's hosts as well as services running on the user's local machine utilizing WebRTC connections.

Mitigation

Update the affected packages.
www-client/firefox to version: 88.0
www-client/firefox-bin to version: 88.0

Vulnerable software versions

Gentoo Linux: All versions


CPE2.3 External links

http://security.gentoo.org/
http://security.gentoo.org/glsa/202104-10

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

15) Buffer overflow

EUVDB-ID: #VU51663

Risk: High

CVSSv3.1:

CVE-ID: CVE-2021-23983

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when processing transitions for invalid "::marker" properties by causing a transition on a parent node by removing a CSS rule. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update the affected packages.
www-client/firefox to version: 88.0
www-client/firefox-bin to version: 88.0

Vulnerable software versions

Gentoo Linux: All versions


CPE2.3 External links

http://security.gentoo.org/
http://security.gentoo.org/glsa/202104-10

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

16) Spoofing attack

EUVDB-ID: #VU51664

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-23984

CWE-ID: CWE-451 - User Interface (UI) Misrepresentation of Critical Information (Clickjacking, spoofing)

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to incorrect processing of user-supplied data. A malicious extension could have opened a popup window lacking an address bar. The title of the popup lacking an address bar should not be fully controllable, but in this situation was. This could have been used to spoof a website and attempt to trick the user into providing credentials.

Mitigation

Update the affected packages.
www-client/firefox to version: 88.0
www-client/firefox-bin to version: 88.0

Vulnerable software versions

Gentoo Linux: All versions


CPE2.3 External links

http://security.gentoo.org/
http://security.gentoo.org/glsa/202104-10

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

17) Security restrictions bypass

EUVDB-ID: #VU51665

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-23985

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to application does not properly impose security restrictions. If an attacker is able to alter specific about:config values (for example malware running on the user's computer), the Devtools remote debugging feature could have been enabled in a way that was unnoticable to the user. This would have allowed a remote attacker (able to make a direct network connection to the victim) to monitor the user's browsing activity and (plaintext) network traffic. This was addressed by providing a visual cue when Devtools has an open network socket.

Mitigation

Update the affected packages.
www-client/firefox to version: 88.0
www-client/firefox-bin to version: 88.0

Vulnerable software versions

Gentoo Linux: All versions


CPE2.3 External links

http://security.gentoo.org/
http://security.gentoo.org/glsa/202104-10

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

18) Security restrictions bypass

EUVDB-ID: #VU51666

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-23986

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to application does not properly impose security restrictions. A malicious extension with the 'search' permission could have installed a new search engine whose favicon referenced a cross-origin URL. The response to this cross-origin request could have been read by the extension, allowing a same-origin policy bypass by the extension, which should not have cross-origin permissions. This cross-origin request was made without cookies, so the sensitive information disclosed by the violation was limited to local-network resources or resources that perform IP-based authentication.

Mitigation

Update the affected packages.
www-client/firefox to version: 88.0
www-client/firefox-bin to version: 88.0

Vulnerable software versions

Gentoo Linux: All versions


CPE2.3 External links

http://security.gentoo.org/
http://security.gentoo.org/glsa/202104-10

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

19) Buffer overflow

EUVDB-ID: #VU51667

Risk: High

CVSSv3.1:

CVE-ID: CVE-2021-23987

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when processing HTML content. A remote attacker can create a specially crafted website, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update the affected packages.
www-client/firefox to version: 88.0
www-client/firefox-bin to version: 88.0

Vulnerable software versions

Gentoo Linux: All versions


CPE2.3 External links

http://security.gentoo.org/
http://security.gentoo.org/glsa/202104-10

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

20) Buffer overflow

EUVDB-ID: #VU51668

Risk: High

CVSSv3.1:

CVE-ID: CVE-2021-23988

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when processing HTML content. A remote attacker can create a specially crafted website, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update the affected packages.
www-client/firefox to version: 88.0
www-client/firefox-bin to version: 88.0

Vulnerable software versions

Gentoo Linux: All versions


CPE2.3 External links

http://security.gentoo.org/
http://security.gentoo.org/glsa/202104-10

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

21) Out-of-bounds write

EUVDB-ID: #VU52333

Risk: High

CVSSv3.1:

CVE-ID: CVE-2021-23994

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input within the WebGL framebuffer. A remote attacker can create a specially crafted web page, trick the victim into opening it using the affected software, trigger out-of-bounds write and execute arbitrary code on the target system.

Mitigation

Update the affected packages.
www-client/firefox to version: 88.0
www-client/firefox-bin to version: 88.0

Vulnerable software versions

Gentoo Linux: All versions


CPE2.3 External links

http://security.gentoo.org/
http://security.gentoo.org/glsa/202104-10

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

22) Use-fater-free

EUVDB-ID: #VU52334

Risk: High

CVSSv3.1:

CVE-ID: CVE-2021-23995

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input, when Responsive Design Mode is enabled. A remote attacker can create a specially crafted web page, trick the victim into opening it using the affected software, trigger a use-after-fee error and execute arbitrary code on the target system.

Mitigation

Update the affected packages.
www-client/firefox to version: 88.0
www-client/firefox-bin to version: 88.0

Vulnerable software versions

Gentoo Linux: All versions


CPE2.3 External links

http://security.gentoo.org/
http://security.gentoo.org/glsa/202104-10

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

23) Insecure Inherited Permissions

EUVDB-ID: #VU52337

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-23998

CWE-ID: CWE-277 - Insecure inherited permissions

Exploit availability: No

Description

the vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to the way HTTP pages inherit a secure lock icon, when navigating from an HTTP page. A remote attacker can create a specially crafted webpage that through a series of complicated navigation will force the browser to display a secure lock icon on an unencrypted HTTP page.

Mitigation

Update the affected packages.
www-client/firefox to version: 88.0
www-client/firefox-bin to version: 88.0

Vulnerable software versions

Gentoo Linux: All versions


CPE2.3 External links

http://security.gentoo.org/
http://security.gentoo.org/glsa/202104-10

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

24) Insecure Inherited Permissions

EUVDB-ID: #VU52338

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-23999

CWE-ID: CWE-277 - Insecure inherited permissions

Exploit availability: No

Description

the vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to the way Firefox handles Blob URLs. If a Blob URL was loaded through some unusual user interaction, it could have been loaded by the System Principal and granted additional privileges that should not be granted to web content.

Mitigation

Update the affected packages.
www-client/firefox to version: 88.0
www-client/firefox-bin to version: 88.0

Vulnerable software versions

Gentoo Linux: All versions


CPE2.3 External links

http://security.gentoo.org/
http://security.gentoo.org/glsa/202104-10

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

25) Input validation error

EUVDB-ID: #VU52341

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-24002

CWE-ID: CWE-20 - Improper Input Validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to insufficient validation of user-supplied input when processing newline characters in an FTP URL (such as %0A and %0D). A remote attacker can trick the victim to click on a specially crafted URL and execute arbitrary FTP commands on a remote server, given that victim has access to the FTP server.

Mitigation

Update the affected packages.
www-client/firefox to version: 88.0
www-client/firefox-bin to version: 88.0

Vulnerable software versions

Gentoo Linux: All versions


CPE2.3 External links

http://security.gentoo.org/
http://security.gentoo.org/glsa/202104-10

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

26) Incorrect calculation

EUVDB-ID: #VU52342

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-29945

CWE-ID: CWE-682 - Incorrect Calculation

Exploit availability: No

Description

The vulnerability allows a remote attacker to crash the application.

The vulnerability exists due to the WebAssembly JIT miscalculates the size of a return type, which leads to a null read. A remote attacker can create a specially crafted web page, trick the victim into visiting it and crash the browser.

Note, the vulnerability affects 32-bit platforms only.

Mitigation

Update the affected packages.
www-client/firefox to version: 88.0
www-client/firefox-bin to version: 88.0

Vulnerable software versions

Gentoo Linux: All versions


CPE2.3 External links

http://security.gentoo.org/
http://security.gentoo.org/glsa/202104-10

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

27) Input validation error

EUVDB-ID: #VU52346

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-29946

CWE-ID: CWE-20 - Improper Input Validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to insufficient validation of user-supplied input. Ports that were written as an integer overflow above the bounds of a 16-bit integer could have bypassed port blocking restrictions when used in the Alt-Svc header.

Mitigation

Update the affected packages.
www-client/firefox to version: 88.0
www-client/firefox-bin to version: 88.0

Vulnerable software versions

Gentoo Linux: All versions


CPE2.3 External links

http://security.gentoo.org/
http://security.gentoo.org/glsa/202104-10

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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