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CVE-2020-14363

Publication date 25 August 2020

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.8 · High

Score breakdown

An integer overflow vulnerability leading to a double-free was found in libX11. This flaw allows a local privileged attacker to cause an application compiled with libX11 to crash, or in some cases, result in arbitrary code execution. The highest threat from this flaw is to confidentiality, integrity as well as system availability.

Status

Package Ubuntu Release Status
libx11 20.04 LTS focal
Fixed 2:1.6.9-2ubuntu1.1
18.04 LTS bionic
Fixed 2:1.6.4-3ubuntu0.3
16.04 LTS xenial
Fixed 2:1.6.3-1ubuntu2.2
14.04 LTS trusty

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
libx11

Severity score breakdown

Parameter Value
Base score 7.8 · High
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

    • USN-4487-1
    • libx11 vulnerabilities
    • 2 September 2020
    • USN-4487-2
    • libx11 vulnerabilities
    • 8 September 2020

Other references