| Description: | Description:
The remote host is missing an update to bzip2
announced via advisory USN-127-1.
A security issue affects the following Ubuntu releases:
Ubuntu 4.10 (Warty Warthog)
Ubuntu 5.04 (Hoary Hedgehog)
The following packages are affected: bzip2, libbz2-1.0
Imran Ghory discovered a race condition in the file permission restore
code of bunzip2. While a user was decompressing a file, a local
attacker with write permissions in the directory of that file could
replace the target file with a hard link. This would cause bzip2 to
restore the file permissions to the hard link target instead of to the
bzip2 output file, which could be exploited to gain read or even write
access to files of other users. (CVE-2005-0953)
Specially crafted bzip2 archives caused an infinite loop in the
decompressor which resulted in an indefinitively large output file
(decompression bomb). This could be exploited to a Denial of Service
attack due to disk space exhaustion on systems which automatically
process user supplied bzip2 compressed files. (CVE-2005-1260)
Solution:
The problem can be corrected by upgrading the affected package to
version 1.0.2-1ubuntu0.1 (for Ubuntu 4.10), or 1.0.2-2ubuntu0.1 (for
Ubuntu 5.04). In general, a standard system upgrade is sufficient to
effect the necessary changes.
http://www.securityspace.com/smysecure/catid.html?in=USN-127-1
Risk factor : Medium
CVSS Score:
5.0
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