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UnAce: Buffer overflow and directory traversal vulnerabilities

Content:

1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200502-32 / unace
Release Date February 28, 2005
Latest Revision May 19, 2014: 2
Impact normal
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
app-arch/unace <= 2.5-r3 >= 2.5-r3 All supported architectures

Related bugreports: #81958

Synopsis

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

2.  Impact Information

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.

3.  Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All UnAce users should upgrade to the latest available version:

Code Listing 3.1: Resolution

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

4.  References



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Page updated February 28, 2005

Summary: This is a Gentoo Linux Security Advisory

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