Multiple vulnerabilities have been identified in Libarchive, which could be exploited by attackers to cause a denial of service or execute arbitrary code.
The first issue is caused by an infinite loop when handling an archive that prematurely ends within a pax extension header or when certain types of corruption occur in pax extension headers, which could be exploited by attackers to create a denial of service condition.
The second vulnerability is caused by a NULL pointer dereference when handling an archive that prematurely ends within a tar header immediately following a pax extension header or when certain other types of corruption occur in pax extension headers, which could be exploited by attackers to crash an affected application, creating a denial of service condition.
The third issue buffer overflow error when processing a malformed pax extension header, which could be exploited by attackers to execute arbitrary code via a specially crafted archive.
Credits
Vulnerabilities reported by CPNI, CERT-FI, Tim Kientzle and Colin Percival.
ChangeLog
2007-07-13 : Initial release
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