Multiple vulnerabilities in WebKitGTK and WPE WebKit



Risk Medium
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2021-30887
CVE-2021-30890
CWE-ID CWE-264
CWE-79
Exploitation vector Network
Public exploit N/A
Vulnerable software
 WPE WebKit
Server applications / Frameworks for developing and running applications

WebKitGTK+
Server applications / Frameworks for developing and running applications

Vendor WebKitGTK

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Security restrictions bypass

EUVDB-ID: #VU57740

Risk: Low

CVSSv4.0: 0.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-30887

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 an error within the WebKit component. A remote attacker can trick the victim to open a specially crafted website and bypass Content Security Policy restrictions.

Mitigation

Install update from vendor's website.

Vulnerable software versions

WPE WebKit: 2.34.0 - 2.34.2

WebKitGTK+: 2.34.0 - 2.34.2

CPE2.3 External links

https://webkitgtk.org/security/WSA-2021-0007.html


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Universal Cross-site scripting

EUVDB-ID: #VU57744

Risk: Medium

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-30890

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 WebKLit. 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

WPE WebKit: 2.34.0 - 2.34.2

WebKitGTK+: 2.34.0 - 2.34.2

CPE2.3 External links

https://webkitgtk.org/security/WSA-2021-0007.html


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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