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Gentoo Linux Security Advisory                           GLSA 202003-13
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: musl: Stack-based buffer overflow
     Date: March 14, 2020
     Bugs: #711276
       ID: 202003-13

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Synopsis
========

A stack-based buffer overflow in musl might allow an attacker to have
an application dependent impact.

Background
==========

musl is an implementation of the C standard library built on top of the
Linux system call API, including interfaces defined in the base
language standard, POSIX, and widely agreed-upon extensions.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  sys-libs/musl                < 1.1.24                  >= 1.1.24

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

A flaw in musl libc's arch-specific math assembly code for i386 was
found which can lead to x87 stack overflow in the execution of
subsequent math code.

Impact
======

Impact depends on how the application built against musl libc handles
the ABI-violating x87 state.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All musl users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=sys-libs/musl-1.1.24"

References
==========

[ 1 ] CVE-2019-14697
      https://nvd.nist.gov/vuln/detail/CVE-2019-14697

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

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

 https://security.gentoo.org/glsa/202003-13

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 2020 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