CVE-2023-29469

Publication date 12 April 2023

Last updated 26 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

6.5 · Medium

Score breakdown

Description

An issue was discovered in libxml2 before 2.10.4. When hashing empty dict strings in a crafted XML document, xmlDictComputeFastKey in dict.c can produce non-deterministic values, leading to various logic and memory errors, such as a double free. This behavior occurs because there is an attempt to use the first byte of an empty string, and any value is possible (not solely the '\0' value).

Status

Package Ubuntu Release Status
libxml2 23.04 lunar
Fixed 2.9.14+dfsg-1.1ubuntu0.1
22.10 kinetic
Fixed 2.9.14+dfsg-1ubuntu0.2
22.04 LTS jammy
Fixed 2.9.13+dfsg-1ubuntu0.3
20.04 LTS focal
Fixed 2.9.10+dfsg-5ubuntu0.20.04.6
18.04 LTS bionic
Fixed 2.9.4+dfsg1-6.1ubuntu1.9
16.04 LTS xenial
Fixed 2.9.3+dfsg1-1ubuntu0.7+esm5
14.04 LTS trusty
Fixed 2.9.1+dfsg1-3ubuntu4.13+esm5

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Severity score breakdown

Parameter Value
Base score 6.5 · Medium
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

Other references