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CVE-2016-1836

Published: 20 May 2016

Use-after-free vulnerability in the xmlDictComputeFastKey function in libxml2 before 2.9.4, as used in Apple iOS before 9.3.2, OS X before 10.11.5, tvOS before 9.2.1, and watchOS before 2.2.1, allows remote attackers to cause a denial of service via a crafted XML document.

Notes

AuthorNote
tyhicks
2.9.2 first introduced the flaw but it was backported to Trusty
via 0006-Fix-a-parsing-bug-on-non-ascii-element-and-CR-LF-usa.patch

Priority

Medium

Cvss 3 Severity Score

5.5

Score breakdown

Status

Package Release Status
libxml2
Launchpad, Ubuntu, Debian
precise Not vulnerable
(2.7.8.dfsg-5.1ubuntu4.14)
trusty
Released (2.9.1+dfsg1-3ubuntu4.8)
upstream
Released (2.9.4)
wily
Released (2.9.2+zdfsg1-4ubuntu0.4)
xenial
Released (2.9.3+dfsg1-1ubuntu0.1)
yakkety Not vulnerable
(2.9.3+dfsg1-1.2)
zesty Not vulnerable
(2.9.3+dfsg1-1.2)
Patches:
upstream: https://git.gnome.org/browse/libxml2/commit/?id=45752d2c334b50016666d8f0ec3691e2d680f0a0

Severity score breakdown

Parameter Value
Base score 5.5
Attack vector Local
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H