Multiple vulnerabilities in Firefox ESR
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 9 |
| CVE-ID | CVE-2022-34479 CVE-2022-34470 CVE-2022-34468 CVE-2022-34481 CVE-2022-31744 CVE-2022-34472 CVE-2022-34478 CVE-2022-2200 CVE-2022-34484 |
| CWE-ID | CWE-1021 CWE-416 CWE-254 CWE-190 CWE-388 CWE-939 CWE-94 CWE-119 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Firefox ESR Client/Desktop applications / Web browsers |
| Vendor | Mozilla |
Security Bulletin
This security bulletin contains information about 9 vulnerabilities.
1) Improper Restriction of Rendered UI Layers or Frames
EUVDB-ID: #VU64750
Risk: Medium
CVSSv3.1: 6.2 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2022-34479
CWE-ID:
CWE-1021 - Improper Restriction of Rendered UI Layers or Frames
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform spoofing attack.
The vulnerability exists due to improper handling of resizing event for a popup window. A remote attacker can create a specially crafted website that can create a resized popup to overlay the address bar with its own content and perform spoofing attack.
Note, the vulnerability affects Linux installations only.
Install update from vendor's website.
Vulnerable software versionsFirefox ESR: 91.0 - 91.10.0
External linkshttp://www.mozilla.org/en-US/security/advisories/mfsa2022-25/
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to trick the victim to visit a specially crafted website.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Use-after-free
EUVDB-ID: #VU64751
Risk: High
CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2022-34470
CWE-ID:
CWE-416 - Use After Free
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error in nsSHistory when handling XML documents. A remote attacker can trigger a use-after-free error and execute arbitrary code on the system.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
MitigationInstall update from vendor's website.
Vulnerable software versionsFirefox ESR: 91.0 - 91.10.0
External linkshttp://www.mozilla.org/en-US/security/advisories/mfsa2022-25/
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to trick the victim to visit a specially crafted website.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
3) Security features bypass
EUVDB-ID: #VU64752
Risk: Medium
CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2022-34468
CWE-ID:
CWE-254 - Security Features
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to improper handling of the CSP sandbox header without "allow-scripts" option. A remote attacker use an iframe to bypass implemented CSP restriction and execute scripts if the user clicks on a javascript: link.
Install update from vendor's website.
Vulnerable software versionsFirefox ESR: 91.0 - 91.10.0
External linkshttp://www.mozilla.org/en-US/security/advisories/mfsa2022-25/
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to trick the victim to visit a specially crafted website.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
4) Integer overflow
EUVDB-ID: #VU64756
Risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2022-34481
CWE-ID:
CWE-190 - Integer overflow
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to integer overflow in the nsTArray_Impl::ReplaceElementsAt() function. A remote attacker can trick the victim to visit a specially crafted website, trigger an integer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
MitigationInstall update from vendor's website.
Vulnerable software versionsFirefox ESR: 91.0 - 91.10.0
External linkshttp://www.mozilla.org/en-US/security/advisories/mfsa2022-25/
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to trick the victim to visit a specially crafted website.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
5) Security features bypass
EUVDB-ID: #VU63881
Risk: Medium
CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2022-31744
CWE-ID:
CWE-254 - Security Features
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to an error when processing CSS stylesheets accessible via internal URIs, as "resource:". A remote attacker can bypass implemented Content Security Policy.
Install update from vendor's website.
Vulnerable software versionsFirefox ESR: 91.0 - 91.10.0
External linkshttp://www.mozilla.org/en-US/security/advisories/mfsa2022-25/
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to trick the victim to visit a specially crafted website.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
6) Error Handling
EUVDB-ID: #VU64760
Risk: Low
CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2022-34472
CWE-ID:
CWE-388 - Error Handling
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to influence browser behavior.
The vulnerability exists due to improper error handling when processing unavailable PAC file. If a PAC URL is set and the server that hosts the PAC is unreachable, OCSP requests are blocked, resulting in incorrect error pages being shown.
MitigationInstall update from vendor's website.
Vulnerable software versionsFirefox ESR: 91.0 - 91.10.0
External linkshttp://www.mozilla.org/en-US/security/advisories/mfsa2022-25/
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to trick the victim to visit a specially crafted website.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
7) Improper Authorization in Handler for Custom URL Scheme
EUVDB-ID: #VU64761
Risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2022-34478
CWE-ID:
CWE-939 - Improper Authorization in Handler for Custom URL Scheme
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to insecure usage of URI handlers that allow usage of ms-msdt, search, and search-ms protocols. A remote attacker can trick the victim to click on a specially crafted link and execute arbitrary code on the system, if the victim accepts the browser prompt.
The vulnerability affects Firefox on Windows.
Install update from vendor's website.
Vulnerable software versionsFirefox ESR: 91.0 - 91.10.0
External linkshttp://www.mozilla.org/en-US/security/advisories/mfsa2022-25/
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to trick the victim to visit a specially crafted website.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
8) Code Injection
EUVDB-ID: #VU64762
Risk: Medium
CVSSv3.1: 5.9 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2022-2200
CWE-ID:
CWE-94 - Improper Control of Generation of Code ('Code Injection')
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to execute arbitrary JavaScript code.
The vulnerability exists due to improper input validation when handling JavaScript attributes. A remote attacker can pass undesired attributes to JavaScript object and perform prototype pollution and execute arbitrary JavaScript code in the browser.
Install update from vendor's website.
Vulnerable software versionsFirefox ESR: 91.0 - 91.10.0
External linkshttp://www.mozilla.org/en-US/security/advisories/mfsa2022-25/
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to trick the victim to visit a specially crafted website.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
9) Buffer overflow
EUVDB-ID: #VU64763
Risk: High
CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2022-34484
CWE-ID:
CWE-119 - Memory corruption
Exploit availability: No
DescriptionThe 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.
MitigationInstall update from vendor's website.
Vulnerable software versionsFirefox ESR: 91.0 - 91.10.0
External linkshttp://www.mozilla.org/en-US/security/advisories/mfsa2022-25/
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to trick the victim to visit a specially crafted website.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
