CVE-2017-9050

Publication date 18 May 2017

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

libxml2 20904-GITv2.9.4-16-g0741801 is vulnerable to a heap-based buffer over-read in the xmlDictAddString function in dict.c. This vulnerability causes programs that use libxml2, such as PHP, to crash. This vulnerability exists because of an incomplete fix for CVE-2016-1839.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
libxml2	17.04 zesty	Fixed 2.9.4+dfsg1-2.2ubuntu0.1
	16.10 yakkety	Ignored end of life
	16.04 LTS xenial	Fixed 2.9.3+dfsg1-1ubuntu0.3
	14.04 LTS trusty	Fixed 2.9.1+dfsg1-3ubuntu4.10

Notes

mdeslaur

probably same issue as CVE-2017-9049

Patch details

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

Package	Patch details
libxml2	Upstream: ?id=e26

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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H