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Debian Security Advisory DSA 2863-1 (libtar - directory traversal)
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
A directory traversal attack was reported against libtar, a C library for manipulating tar archives. The application does not validate the filenames inside the tar archive, allowing to extract files in arbitrary path. An attacker can craft a tar file to override files beyond the tar_extract_glob and tar_extract_all prefix parameter.
Affected Software
Affected Software
libtar on Debian Linux
Detection Method
Detection Method
This check tests the installed software version using the apt package manager.
Solution
Solution
For the oldstable distribution (squeeze), this problem has been fixed in version 1.2.11-6+deb6u2. For the stable distribution (wheezy), this problem has been fixed in version 1.2.16-1+deb7u2. For the unstable distribution (sid), this problem has been fixed in version 1.2.20-2. We recommend that you upgrade your libtar packages.