UnAce: Buffer overflow and directory traversal vulnerabilities — GLSA 200502-32

UnAce is vulnerable to several buffer overflow and directory traversal attacks.

Affected Packages

app-arch/unace on all architectures
Affected versions <= 2.5-r3
Unaffected versions >= 2.5-r3

Background

UnAce is an utility to extract, view and test the contents of an ACE archive.

Description

Ulf Harnhammar discovered that UnAce suffers from buffer overflows when testing, unpacking or listing specially crafted ACE archives (CAN-2005-0160). He also found out that UnAce is vulnerable to directory traversal attacks, if an archive contains “./..” sequences or absolute filenames (CAN-2005-0161).

Impact

An attacker could exploit the buffer overflows to execute malicious code or the directory traversals to overwrite arbitrary files.

Workaround

There is no known workaround at this time.

Resolution

All UnAce users should upgrade to the latest available version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=app-arch/unace-2.5-r3"
 

References

Release Date
February 28, 2005

Latest Revision
May 19, 2014: 2

Severity
normal

Exploitable
remote

Bugzilla entries