CVE-2015-8790

Publication date 29 January 2016

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

The EbmlUnicodeString::UpdateFromUTF8 function in libEBML before 1.3.3 allows context-dependent attackers to obtain sensitive information from process heap memory via a crafted UTF-8 string, which triggers an invalid memory access.

Read the notes from the security team

Status

Show unmaintained releases

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 it looks like it uses the system version of it

Severity score breakdown

Parameter	Value
Base score	4.3 · Medium
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Unchanged
Confidentiality	Low
Integrity impact	None
Availability impact	None
Vector	CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N