Ubuntu update for webkit2gtk



Published: 2021-05-10
Risk Critical
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2021-1788
CVE-2021-1844
CVE-2021-1871
CWE-ID CWE-416
CWE-119
CWE-840
Exploitation vector Network
Public exploit Vulnerability #3 is being exploited in the wild.
Vulnerable software
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Ubuntu
Operating systems & Components / Operating system

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

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

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Use-after-free

EUVDB-ID: #VU50231

Risk: High

CVSSv3.1:

CVE-ID: CVE-2021-1788

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 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

Update the affected package webkit2gtk to the latest version.

Vulnerable software versions

Ubuntu: 20.10, 20.04, 18.04

libwebkit2gtk-4.0-37 (Ubuntu package): before 2.32.0-0ubuntu0.20.04.1

libjavascriptcoregtk-4.0-18 (Ubuntu package): before 2.32.0-0ubuntu0.20.04.1


CPE2.3 External links

http://ubuntu.com/security/notices/USN-4939-1

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

2) Buffer overflow

EUVDB-ID: #VU51268

Risk: High

CVSSv3.1:

CVE-ID: CVE-2021-1844

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 web content in WebKit. 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 package webkit2gtk to the latest version.

Vulnerable software versions

Ubuntu: 20.10, 20.04, 18.04

libwebkit2gtk-4.0-37 (Ubuntu package): before 2.32.0-0ubuntu0.20.04.1

libjavascriptcoregtk-4.0-18 (Ubuntu package): before 2.32.0-0ubuntu0.20.04.1


CPE2.3 External links

http://ubuntu.com/security/notices/USN-4939-1

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

3) Business Logic Errors

EUVDB-ID: #VU50044

Risk: Critical

CVSSv3.1:

CVE-ID: CVE-2021-1871

CWE-ID: CWE-840 - Business Logic Errors (3.0)

Exploit availability: No

Description

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

The vulnerability exists due to a logic issue in the WebKit component. A remote attacker can trick a victim to visit a malicious website and execute arbitrary code on the system.

Note: The vulnerability is being actively exploited in the wild.

Mitigation

Update the affected package webkit2gtk to the latest version.

Vulnerable software versions

Ubuntu: 20.10, 20.04, 18.04

libwebkit2gtk-4.0-37 (Ubuntu package): before 2.32.0-0ubuntu0.20.04.1

libjavascriptcoregtk-4.0-18 (Ubuntu package): before 2.32.0-0ubuntu0.20.04.1


CPE2.3 External links

http://ubuntu.com/security/notices/USN-4939-1

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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