Multiple vulnerabilities in WebKitGTK



Published: 2021-05-25 | Updated: 2021-11-11
Risk High
Patch available YES
Number of vulnerabilities 7
CVE-ID CVE-2021-30744
CVE-2021-21779
CVE-2021-30682
CVE-2021-30689
CVE-2021-30749
CVE-2021-30734
CVE-2021-30720
CWE-ID CWE-79
CWE-416
CWE-200
CWE-119
CWE-254
Exploitation vector Network
Public exploit Public exploit code for vulnerability #2 is available.
Public exploit code for vulnerability #3 is available.
Vulnerable software
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WebKitGTK+
Server applications / Frameworks for developing and running applications

Vendor WebKitGTK

Security Bulletin

This security bulletin contains information about 7 vulnerabilities.

1) Universal cross-site scripting

EUVDB-ID: #VU53496

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-30744

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 in WebKit. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation

Install update from vendor's website.

Vulnerable software versions

WebKitGTK+: 2.30.0 - 2.32.1


CPE2.3 External links

http://support.apple.com/en-us/HT212529

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

2) Use-after-free

EUVDB-ID: #VU53497

Risk: High

CVSSv3.1:

CVE-ID: CVE-2021-21779

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 use-after-free error when processing HTML content in WebKit. A remote attacker can create a specially crafted web page, trick the victim into opening it, 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.

Mitigation

Install update from vendor's website.

Vulnerable software versions

WebKitGTK+: 2.30.0 - 2.32.1


CPE2.3 External links

http://support.apple.com/en-us/HT212529

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

3) Information disclosure

EUVDB-ID: #VU53498

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-30682

CWE-ID: CWE-200 - Information Exposure

Exploit availability: Yes

Description

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

The vulnerability exists due to excessive data output by the application in webKit. A remote attacker can gain unauthorized access to sensitive user information.

Mitigation

Install update from vendor's website.

Vulnerable software versions

WebKitGTK+: 2.30.0 - 2.32.1


CPE2.3 External links

http://support.apple.com/en-us/HT212529

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

4) Universal cross-site scripting

EUVDB-ID: #VU53499

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-30689

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 in WebKit. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation

Install update from vendor's website.

Vulnerable software versions

WebKitGTK+: 2.30.0 - 2.32.1


CPE2.3 External links

http://support.apple.com/en-us/HT212529

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

5) Buffer overflow

EUVDB-ID: #VU53500

Risk: High

CVSSv3.1:

CVE-ID: CVE-2021-30749

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

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 within the KeyframeEffect class in WebKit. A remote attacker can create a specially crafted web oage, 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

Install update from vendor's website.

Vulnerable software versions

WebKitGTK+: 2.30.0 - 2.32.1


CPE2.3 External links

http://support.apple.com/en-us/HT212529

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

6) Buffer overflow

EUVDB-ID: #VU53501

Risk: High

CVSSv3.1:

CVE-ID: CVE-2021-30734

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

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 in WebKit. A remote attacker can create a specially crafted web oage, 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

Install update from vendor's website.

Vulnerable software versions

WebKitGTK+: 2.30.0 - 2.32.1


CPE2.3 External links

http://support.apple.com/en-us/HT212529

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

7) Security features bypass

EUVDB-ID: #VU53502

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-30720

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 in WebKit due to the way the component handles links to internal resources. A remote attacker can create a specially crafted web page and trick the application to connect to arbitrary internal addresses.

Mitigation

Install update from vendor's website.

Vulnerable software versions

WebKitGTK+: 2.30.0 - 2.32.1


CPE2.3 External links

http://support.apple.com/en-us/HT212529

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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