GLSA 200410-01: sharutils: Buffer overflows in shar.c and unshar.c

http://security.gentoo.org/

Severity:	normal
Title:	sharutils: Buffer overflows in shar.c and unshar.c
Date:	10/01/2004
Bugs:	#65773
ID:	200410-01

Synopsis

sharutils contains two buffer overflow vulnerabilities that could lead to arbitrary code execution.

Background

sharutils contains utilities to manage shell archives.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
app-arch/sharutils	<= 4.2.1-r9	>= 4.2.1-r10	All supported architectures

Description

sharutils contains two buffer overflows. Ulf Harnhammar discovered a buffer overflow in shar.c, where the length of data returned by the wc command is not checked. Florian Schilhabel discovered another buffer overflow in unshar.c.

Impact

An attacker could exploit these vulnerabilities to execute arbitrary code as the user running one of the sharutils programs.

Workaround

There is no known workaround at this time.

Resolution

All sharutils users should upgrade to the latest version:

    # emerge sync
    
    # emerge -pv ">=app-arch/sharutils-4.2.1-r10"
    # emerge ">=app-arch/sharutils-4.2.1-r10"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200410-01.xml

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.