CVE-2019-19956

Publication date 24 December 2019

Last updated 24 July 2024

Ubuntu priority

Low

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

xmlParseBalancedChunkMemoryRecover in parser.c in libxml2 before 2.9.10 has a memory leak related to newDoc->oldNs.

Read the notes from the security team

Status

Package Ubuntu Release Status
libxml2 20.04 LTS focal
Fixed 2.9.10+dfsg-1ubuntu2
19.10 eoan
Fixed 2.9.4+dfsg1-7ubuntu3.1
19.04 disco Ignored end of life
18.04 LTS bionic
Fixed 2.9.4+dfsg1-6.1ubuntu1.3
16.04 LTS xenial
Fixed 2.9.3+dfsg1-1ubuntu0.7
14.04 LTS trusty

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Notes

ccdm94

the fix for this issue, made available with commit 5a02583c, was reverted in version 2.9.11 with commit a0a8059b, since it seems like the fix introduced various memory issues in libxml2. More information regarding this choice made by upstream can be seen at: https://gitlab.gnome.org/GNOME/libxml2/-/issues/161

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
libxml2

Severity score breakdown

Parameter Value
Base score 7.5 · High
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

    • USN-4274-1
    • libxml2 vulnerabilities
    • 10 February 2020

Other references