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Gentoo: GLSA-202208-21 High: libebml Heap Buffer Overflow

gentoo
Calendar Grey August 13, 2022
Dist Gentoo Esm H88
Gentoo Linux Advisory GLSA 202209-03 highlights a critical libxml vulnerability posing risks to systems. Immediate action required!
A heap-based buffer overflow in libeml might allow attackers to execute arbitrary code.

Summary

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

Topics%20covered

Topics Covered

security advisory high severity gentoo buffer overflow arbitrary code execution libebml

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

[ 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
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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.

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

Topics%20covered

Topics Covered

security advisory high severity gentoo buffer overflow arbitrary code execution libebml

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.

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Affected Packages

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

Impact

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

Workaround

There is no known workaround at this time.

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