GLSA 200611-24: LHa: Multiple vulnerabilities

http://security.gentoo.org/

Severity:	normal
Title:	LHa: Multiple vulnerabilities
Date:	11/28/2006
Bugs:	#151252
ID:	200611-24

Synopsis

LHa is affected by several vulnerabilities including the remote execution of arbitrary code.

Background

LHa is a console-based program for packing and unpacking LHarc archives.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
app-arch/lha	< 114i-r6	>= 114i-r6	All supported architectures

Description

Tavis Ormandy of the Google Security Team discovered several vulnerabilities in the LZH decompression component used by LHa. The make_table function of unlzh.c contains an array index error and a buffer overflow vulnerability. The build_tree function of unpack.c contains a buffer underflow vulnerability. Additionally, unlzh.c contains a code that could run in an infinite loop.

Impact

By enticing a user to uncompress a specially crafted archive, a remote attacker could cause a Denial of Service by CPU consumption or execute arbitrary code with the rights of the user running the application.

Workaround

There is no known workaround at this time.

Resolution

All LHa users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-arch/lha-114i-r6"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200611-24.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.