Joined: 12 May 2004
|Posted: Tue Nov 28, 2006 9:26 pm Post subject: [ GLSA 200611-24 ] LHa: Multiple vulnerabilities
|Gentoo Linux Security Advisory
Title: LHa: Multiple vulnerabilities (GLSA 200611-24)
Date: November 28, 2006
LHa is affected by several vulnerabilities including the remote execution of arbitrary code.
LHa is a console-based program for packing and unpacking LHarc archives.
Vulnerable: < 114i-r6
Unaffected: >= 114i-r6
Architectures: All supported architectures
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.
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.
There is no known workaround at this time.
All LHa users should upgrade to the latest version:
|# emerge --sync
# emerge --ask --oneshot --verbose ">=app-arch/lha-114i-r6"