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CVE-2022-3515

Published: 17 October 2022

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.

Priority

High

Cvss 3 Severity Score

9.8

Score breakdown

Status

Package Release Status
libksba
Launchpad, Ubuntu, Debian
focal
Released (1.3.5-2ubuntu0.20.04.1)
jammy
Released (1.6.0-2ubuntu0.1)
trusty
Released (1.3.0-3ubuntu0.14.04.2+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
xenial
Released (1.3.3-1ubuntu0.16.04.1+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
bionic
Released (1.3.5-2ubuntu0.18.04.1)
upstream
Released (1.6.2-1)
kinetic
Released (1.6.0-3ubuntu1)
Patches:
upstream: https://dev.gnupg.org/rK4b7d9cd4a018898d7714ce06f3faf2626c14582b

Severity score breakdown

Parameter Value
Base score 9.8
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