FreeBSD Security Advisory - Several problems have been found in the libarchive code used to parse the tar and pax interchange formats. These include entering an infinite loop if an archive prematurely ends within a pax extension header or if certain types of corruption occur in pax extension headers, dereferencing a NULL pointer if an archive prematurely ends within a tar header immediately following a pax extension header or if certain other types of corruption occur in pax extension headers, and miscomputing the length of a buffer resulting in a buffer overflow if yet another type of corruption occurs in a pax extension header.
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