GLSA 202208-21: libebml: Heap buffer overflow vulnerability

http://security.gentoo.org/

Severity:	high
Title:	libebml: Heap buffer overflow vulnerability
Date:	08/14/2022
Bugs:	#772272
ID:	202208-21

Synopsis

A heap-based buffer overflow in libeml might allow attackers to execute arbitrary code.

Background

libebml is a C++ library to parse EBML files.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
dev-libs/libebml	< 1.4.2	>= 1.4.2	arm, ppc, sparc, x86

Description

On 32bit builds of libebml, the length of a string is miscalculated, potentially leading to an exploitable heap overflow.

Impact

An attacker able to provide arbitrary input to libebml could achieve arbitrary code execution.

Workaround

There is no known workaround at this time.

Resolution

Users of libebml on 32 bit architectures should upgrade to the latest version:

          # emerge --sync
          # emerge --ask --oneshot --verbose ">=dev-libs/libebml-1.4.2"

References

CVE-2021-3405

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-202208-21.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.