CVE-2020-24977

Publication date 4 September 2020

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

GNOME project libxml2 v2.9.10 has a global buffer over-read vulnerability in xmlEncodeEntitiesInternal at libxml2/entities.c. The issue has been fixed in commit 50f06b3e.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
libxml2	22.04 LTS jammy	Not affected
	21.10 impish	Not affected
	21.04 hirsute	Not affected
	20.10 groovy	Fixed 2.9.10+dfsg-5ubuntu0.20.10.2
	20.04 LTS focal	Fixed 2.9.10+dfsg-5ubuntu0.20.04.1
	18.04 LTS bionic	Fixed 2.9.4+dfsg1-6.1ubuntu1.4
	16.04 LTS xenial	Fixed 2.9.3+dfsg1-1ubuntu0.7+esm1 Ubuntu Pro
	14.04 LTS trusty	Fixed 2.9.1+dfsg1-3ubuntu4.13+esm2 Ubuntu Pro

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Notes

mdeslaur

only affects xmllint contrary to description, not fixed in 8e7c20a1

ccdm94

According to upstream, 50f06b3e is only a partial fix. Commit bf22713507 must be included in order to achieve a complete fix. Commit bf22713507, however, seems to have introduced an issue (see 237), fixed by 1098c30a04, which in turn seems to be the fix for CVE-2021-3518.

Patch details

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

Package	Patch details
libxml2	Upstream: 50f06b3 Upstream: bf22713

Severity score breakdown

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