RAR, UnRAR: Buffer overflow

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Updated February 13, 2007

1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200702-04 / rar, unrar
Release Date February 13, 2007
Latest Revision February 14, 2007: 02
Impact normal
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
app-arch/rar < 3.7.0_beta1 >= 3.7.0_beta1 All supported architectures
app-arch/unrar < 3.7.3 >= 3.7.3 All supported architectures

Related bugreports: #166440

Synopsis

RAR and UnRAR contain a buffer overflow allowing the execution of arbitrary code.

2.  Impact Information

Background

RAR and UnRAR provide command line interfaces for compressing and decompressing RAR files.

Description

RAR and UnRAR contain a boundary error when processing password-protected archives that could result in a stack-based buffer overflow.

Impact

A remote attacker could entice a user to process a specially crafted password-protected archive and execute arbitrary code with the rights of the user uncompressing the archive.

3.  Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All UnRAR users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=app-arch/unrar-3.7.3"

All RAR users should upgrade to the latest version:

Code Listing 3.2: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=app-arch/rar-3.7.0_beta1"

4.  References