Two vulnerabilities have been reported in IPsec-Tools, which can be exploited by malicious people to cause a DoS (Denial of Service).
1) The racoon daemon improperly deletes orphaned phase 1 handlers when acting as a responder. This can be exploited to cause high resource consumption via invalid packets.
2) An NULL-pointer dereference error within the "isakmp_frag_extract()" function in racoon/isakmp_frag.c can be exploited to cause a crash.
Successful exploitation of this vulnerability requires that fragmentation support is enabled.
The vulnerabilities are reported in versions prior to 0.7.2.
Solution: Update to version 0.7.2.
Provided and/or discovered by: 1) Krzysztof Piotr Oledzk
2) The vendor credits Neil Kettle.
Original Advisory: 1) http://cvsweb.netbsd.org/bsdweb.cgi/src/crypto/dist/ipsec-tools/src/racoon/isakmp.c.diff?r1=220.127.116.11&r2=18.104.22.168&f=h
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Subject: IPsec-Tools Two Denial of Service Vulnerabilities
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