unarj file name buffer overflow

unarj-longfilename-bo (18044) The risk level is classified as HighHigh Risk

Description:

unarj is vulnerable to a buffer overflow, caused by improper bounds checking of user-supplied input. By sending a specially-crafted long file name, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the system to crash, once processed by unarj.


Consequences:

Gain Access

Remedy:

For Gentoo Linux:
Upgrade to the latest version of unarj (2.63a-r2 or later), as listed in GLSA 200411-29. See References.

For SUSE Linux:
Apply the appropriate fixed packages via the SUSE FTP server or the YaST Online Update, as listed in SUSE Security Summary Report SUSE-SR:2004:003. See References.

For Debian GNU/Linux 3.0(woody):
Upgrade to the latest version of unarj (2.43-3woody1 or later), as listed in DSA-652-1. See References.

For Red Hat Linux:
Refer to RHSA-2005:007-05 for patch, upgrade, or suggested workaround information. See References.

For other distributions:
Contact your vendor for upgrade or patch information.

References:

  • ARJ Software Web site: ARJ Software.
  • BID-11665: ARJ Software UNARJ Remote Buffer Overflow Vulnerability
  • CVE-2004-0947: Buffer overflow in unarj before 2.63a-r2 allows remote attackers to execute arbitrary code via an arj archive that contains long filenames.
  • DSA-652: unarj -- several vulnerabilities
  • GLSA-200411-29: unarj: Long filenames buffer overflow and a path traversal vulnerability
  • RHSA-2005-007: unarj security update
  • SUSE-SR:2004:003: SUSE Security Summary Report

Platforms Affected:

  • Debian Debian Linux 3.0
  • Gentoo Linux
  • Microsoft Windows 95
  • Microsoft Windows 98
  • RedHat Enterprise Linux 2.1 AS
  • RedHat Enterprise Linux 2.1 WS
  • RedHat Enterprise Linux 2.1 ES
  • RedHat Linux Advanced Workstation 2.1 Itanium
  • Robert K Jung unarj 2.43-3
  • Robert K Jung unarj 2.63a
  • SUSE SuSE Linux

Reported:

Nov 11, 2004

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