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Gentoo Linux Security Advisory GLSA 202208-21

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                                       https://security.gentoo.org/  

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Severity: High
Title: libebml: Heap buffer overflow vulnerability
Date: August 14, 2022
Bugs: #772272
ID: 202208-21

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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

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 Package              /     Vulnerable     /            Unaffected  
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1 dev-libs/libebml < 1.4.2 >= 1.4.2

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 “>Þv-libs/libebml-1.4.2”

References

[ 1 ] CVE-2021-3405
https://nvd.nist.gov/vuln/detail/CVE-2021-3405

Availability

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

https://security.gentoo.org/glsa/202208-21

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
[email protected] or alternatively, you may file a bug at
https://bugs.gentoo.org.

License

Copyright 2022 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

https://creativecommons.org/licenses/by-sa/2.5