[arch-security] [Arch Linux Security Advisory ASA-201411-27] glibc: command execution

[Remi Gacogne]

Arch Linux Security Advisory ASA-201411-27
==========================================

Severity: Medium
Date    : 2014-11-21
CVE-ID  : CVE-2014-7817
Package : glibc
Type    : command execution
Remote  : No
Link    : https://wiki.archlinux.org/index.php/CVE-2014

Summary
=======

The package glibc before version 2.20-3 is vulnerable to command execution.

Resolution
==========

Upgrade to 2.20-3.

# pacman -Syu "glibc>=2.20-3"

The problem has been fixed upstream but there has been no new release yet.

Workaround
==========

None.

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

The wordexp function could ignore the WRDE_NOCMD flag under certain
input conditions resulting in the execution of a shell for command
substitution when the application did not request it. The implementation
now checks WRDE_NOCMD immediately before executing the shell and returns
the error WRDE_CMDSUB as expected.

Impact
======

An attacker may be able to force arbitrary commands to be executed by an
application using the wordexp function.

References
==========

https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2014-7817
https://sourceware.org/bugzilla/show_bug.cgi?id=17625
http://seclists.org/oss-sec/2014/q4/730

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 819 bytes
Desc: OpenPGP digital signature
URL: <https://lists.archlinux.org/pipermail/arch-security/attachments/20141121/af607d35/attachment.bin>