Ubuntu update for webkit2gtk



Published: 2022-01-06
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
Subscribe 		Ubuntu
Operating systems & Components / Operating system

libjavascriptcoregtk-4.0-18 (Ubuntu package)
Operating systems & Components / Operating system package or component

libwebkit2gtk-4.0-37 (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Security restrictions bypass

EUVDB-ID: #VU57740

Risk: Low

CVSSv3.1: 3.7 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

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

Update the affected package webkit2gtk to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 21.10

libjavascriptcoregtk-4.0-18 (Ubuntu package): before 2.34.3-0ubuntu0.21.10.1

libwebkit2gtk-4.0-37 (Ubuntu package): before 2.34.3-0ubuntu0.21.10.1

External links

http://ubuntu.com/security/notices/USN-5213-1


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

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-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

Update the affected package webkit2gtk to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 21.10

libjavascriptcoregtk-4.0-18 (Ubuntu package): before 2.34.3-0ubuntu0.21.10.1

libwebkit2gtk-4.0-37 (Ubuntu package): before 2.34.3-0ubuntu0.21.10.1

External links

http://ubuntu.com/security/notices/USN-5213-1


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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