CVE-2015-8789

Publication date 29 January 2016

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

9.6 · Critical

Score breakdown

Use-after-free vulnerability in the EbmlMaster::Read function in libEBML before 1.3.3 allows context-dependent attackers to have unspecified impact via a "deeply nested element with infinite size" followed by another element of an upper level in an EBML document.

Read the notes from the security team

Status

Package Ubuntu Release Status
libebml 16.04 LTS xenial
Not affected
15.10 wily Ignored end of life
15.04 vivid Ignored end of life
14.04 LTS trusty
Fixed 1.3.0-2+deb8u1build0.14.04.1
12.04 LTS precise
Fixed 1.2.2-2+deb7u1build0.12.04.1

Notes

sbeattie

mkvtoolnix contains an embedded copy of libebml, but looks to use the system version

Severity score breakdown

Parameter Value
Base score 9.6 · Critical
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Scope Changed
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H