CVE-2016-4449

Publication date 30 May 2016

Last updated 25 August 2025

Ubuntu priority

Low

Why this priority?

Cvss 3 Severity Score

7.1 · High

Score breakdown

Description

XML external entity (XXE) vulnerability in the xmlStringLenDecodeEntities function in parser.c in libxml2 before 2.9.4, when not in validating mode, allows context-dependent attackers to read arbitrary files or cause a denial of service (resource consumption) via unspecified vectors.

Status

Package Ubuntu Release Status
libxml2 17.04 zesty
Not affected
16.10 yakkety
Not affected
16.04 LTS xenial
Fixed 2.9.3+dfsg1-1ubuntu0.1
15.10 wily
Fixed 2.9.2+zdfsg1-4ubuntu0.4
14.04 LTS trusty
Fixed 2.9.1+dfsg1-3ubuntu4.8
12.04 LTS precise
Fixed 2.7.8.dfsg-5.1ubuntu4.15

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 7.1 · High
Attack vector Local
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact High
Vector CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

References

Related Ubuntu Security Notices (USN)

Other references