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Gentoo Linux Security Advisory                           GLSA 202210-12
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                                           https://security.gentoo.org/
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 Severity: Low
    Title: Lighttpd: Denial of Service
     Date: October 31, 2022
     Bugs: #869890
       ID: 202210-12

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Synopsis
========

A vulnerability has been discovered in lighttpd which could result in
denial of service.

Background
==========

Lighttpd is a lightweight high-performance web server.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  www-servers/lighttpd       < 1.4.67                    >= 1.4.67

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

Lighttpd's mod_wstunnel does not initialize a handler function pointer
if an invalid HTTP request (websocket handshake) is received.

Impact
======

An attacker can trigger a denial of service via making Lighttpd try to
call an uninitialized function pointer.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All lighttpd users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=www-servers/lighttpd-1.4.67"

References
==========

[ 1 ] CVE-2022-37797
      https://nvd.nist.gov/vuln/detail/CVE-2022-37797
[ 2 ] CVE-2022-41556
      https://nvd.nist.gov/vuln/detail/CVE-2022-41556

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

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

 https://security.gentoo.org/glsa/202210-12

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 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