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Gentoo Linux Security Advisory                           GLSA 202311-08
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                                           https://security.gentoo.org/
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 Severity: High
    Title: GNU Libmicrohttpd: Buffer Overflow Vulnerability
     Date: November 25, 2023
     Bugs: #778296
       ID: 202311-08

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Synopsis
========

A buffer overflow vulnerability has been discovered in GNU
Libmicrohttpd.

Background
==========

GNU libmicrohttpd is a small C library that makes it easy to run an HTTP
server as part of another application. GNU Libmicrohttpd is free
software and part of the GNU project.

Affected packages
=================

Package                 Vulnerable    Unaffected
----------------------  ------------  ------------
net-libs/libmicrohttpd  = 0.9.70      > 0.9.70

Description
===========

A buffer overflow vulnerability has been discovered in GNU
Libmicrohttpd. Please review the CVE identifier referenced below for
details.

Impact
======

A missing bounds check in the post_process_urlencoded function leads to
a buffer overflow, allowing a remote attacker to write arbitrary data in
an application that uses libmicrohttpd. The highest threat from this
vulnerability is to data confidentiality and integrity as well as system
availability.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All GNU Libmicrohttpd users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">net-libs/libmicrohttpd-0.9.70"

References
==========

[ 1 ] CVE-2021-3466
      https://nvd.nist.gov/vuln/detail/CVE-2021-3466

Availability
============

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

 https://security.gentoo.org/glsa/202311-08

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.

License
=======

Copyright 2023 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/

Gentoo: GLSA-202311-08: GNU Libmicrohttpd: Buffer Overflow Vulnerabili

A buffer overflow vulnerability has been discovered in GNU Libmicrohttpd.

Summary

A buffer overflow vulnerability has been discovered in GNU Libmicrohttpd. Please review the CVE identifier referenced below for details.

Resolution

All GNU Libmicrohttpd users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">net-libs/libmicrohttpd-0.9.70"

References

[ 1 ] CVE-2021-3466 https://nvd.nist.gov/vuln/detail/CVE-2021-3466

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
https://security.gentoo.org/glsa/202311-08

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
Severity: High
Title: GNU Libmicrohttpd: Buffer Overflow Vulnerability
Date: November 25, 2023
Bugs: #778296
ID: 202311-08

Synopsis

A buffer overflow vulnerability has been discovered in GNU Libmicrohttpd.

Background

GNU libmicrohttpd is a small C library that makes it easy to run an HTTP server as part of another application. GNU Libmicrohttpd is free software and part of the GNU project.

Affected Packages

Package Vulnerable Unaffected ---------------------- ------------ ------------ net-libs/libmicrohttpd = 0.9.70 > 0.9.70

Impact

A missing bounds check in the post_process_urlencoded function leads to a buffer overflow, allowing a remote attacker to write arbitrary data in an application that uses libmicrohttpd. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Workaround

There is no known workaround at this time.

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