CVE-2022-3515

Publication date 17 October 2022

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

A vulnerability was found in the Libksba library due to an integer overflow within the CRL parser. The vulnerability can be exploited remotely for code execution on the target system by passing specially crafted data to the application, for example, a malicious S/MIME attachment.

From the Ubuntu Security Team

It was discovered that an integer overflow could be triggered in Libksba when decoding certain data. An attacker could use this issue to cause a denial of service (application crash) or possibly execute arbitrary code.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
libksba	22.10 kinetic	Fixed 1.6.0-3ubuntu1
	22.04 LTS jammy	Fixed 1.6.0-2ubuntu0.1
	20.04 LTS focal	Fixed 1.3.5-2ubuntu0.20.04.1
	18.04 LTS bionic	Fixed 1.3.5-2ubuntu0.18.04.1
	16.04 LTS xenial	Fixed 1.3.3-1ubuntu0.16.04.1+esm1 Ubuntu Pro
	14.04 LTS trusty	Fixed 1.3.0-3ubuntu0.14.04.2+esm1 Ubuntu Pro

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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
libksba	Upstream: https://dev.gnupg.org/rK4b7d9cd4a018898d7714ce06f3faf2626c14582b

Severity score breakdown

Parameter	Value
Base score	9.8 · Critical
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H