ncompress: Buffer overflow — GLSA 200410-08

compress and uncompress, which could be used by daemon programs, contain a buffer overflow that could lead to remote execution of arbitrary code with the rights of the daemon process.

Affected Packages

app-arch/ncompress on all architectures
Affected versions <= 4.2.4
Unaffected versions >= 4.2.4-r1

Background

ncompress is a utility handling compression and decompression of Lempel-Ziv archives, compatible with the original *nix compress and uncompress utilities (.Z extensions).

Description

compress and uncompress do not properly check bounds on command line options, including the filename. Large parameters would trigger a buffer overflow.

Impact

By supplying a carefully crafted filename or other option, an attacker could execute arbitrary code on the system. A local attacker could only execute code with his own rights, but since compress and uncompress are called by various daemon programs, this might also allow a remote attacker to execute code with the rights of the daemon making use of ncompress.

Workaround

There is no known workaround at this time.

Resolution

All ncompress users should upgrade to the latest version:

 # emerge sync
 
 # emerge -pv ">=app-arch/ncompress-4.2.4-r1"
 # emerge ">=app-arch/ncompress-4.2.4-r1"

References

Release Date
October 09, 2004

Latest Revision
May 22, 2006: 02

Severity
normal

Exploitable
remote

Bugzilla entries