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

[GLSA]

Gentoo Linux Security Advisory

Title: sharutils: Buffer overflows in shar.c and unshar.c (GLSA 200410-01)
Severity: normal
Exploitable: remote
Date: October 01, 2004
Updated: May 22, 2006
Bug(s): #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: app-arch/sharutils
Vulnerable: <= 4.2.1-r9
Unaffected: >= 4.2.1-r10
Architectures: 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: