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CVE-2023-29469

Published: 12 April 2023

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).

Priority

Medium

Cvss 3 Severity Score

6.5

Score breakdown

Status

Package Release Status
libxml2
Launchpad, Ubuntu, Debian
bionic
Released (2.9.4+dfsg1-6.1ubuntu1.9)
upstream Needs triage

focal
Released (2.9.10+dfsg-5ubuntu0.20.04.6)
jammy
Released (2.9.13+dfsg-1ubuntu0.3)
kinetic
Released (2.9.14+dfsg-1ubuntu0.2)
trusty
Released (2.9.1+dfsg1-3ubuntu4.13+esm5)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
xenial
Released (2.9.3+dfsg1-1ubuntu0.7+esm5)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
lunar
Released (2.9.14+dfsg-1.1ubuntu0.1)

Severity score breakdown

Parameter Value
Base score 6.5
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