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CVE-2021-3537

Published: 14 May 2021

A vulnerability found in libxml2 in versions before 2.9.11 shows that it did not propagate errors while parsing XML mixed content, causing a NULL dereference. If an untrusted XML document was parsed in recovery mode and post-validated, the flaw could be used to crash the application. The highest threat from this vulnerability is to system availability.

Priority

Medium

Cvss 3 Severity Score

5.9

Score breakdown

Status

Package Release Status
libxml2
Launchpad, Ubuntu, Debian
hirsute
Released (2.9.10+dfsg-6.3ubuntu0.1)
jammy Not vulnerable
(2.9.10+dfsg-6.7)
trusty
Released (2.9.1+dfsg1-3ubuntu4.13+esm2)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
xenial
Released (2.9.3+dfsg1-1ubuntu0.7+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
impish Not vulnerable
(2.9.10+dfsg-6.7)
bionic
Released (2.9.4+dfsg1-6.1ubuntu1.4)
focal
Released (2.9.10+dfsg-5ubuntu0.20.04.1)
groovy
Released (2.9.10+dfsg-5ubuntu0.20.10.2)
upstream
Released (2.9.10+dfsg-6.6, 2.9.11)

Severity score breakdown

Parameter Value
Base score 5.9
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H