LHa: Multiple vulnerabilities LHa is affected by several vulnerabilities including the remote execution of arbitrary code. lha 2006-11-28 2006-11-28: 01 151252 remote 114i-r6 114i-r6

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

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" CVE-2006-4335 CVE-2006-4336 CVE-2006-4337 CVE-2006-4338 falco falco falco