src/racoon/handler.c in racoon in ipsec-tools does not remove an "orphaned ph1" (phase 1) handle when it has been initiated remotely, which allows remote attackers to cause a denial of service (resource consumption).

The racoon daemon in IPsec-Tools 0.8.2 contains a remotely exploitable computational-complexity attack when parsing and storing ISAKMP fragments. The implementation permits a remote attacker to exhaust computational resources on the remote endpoint by repeatedly sending ISAKMP fragment packets in a particular order such that the worst-case computational complexity is realized in the algorithm utilized to determine if reassembly of the fragments can take place.

The eaycheckx509cert function in KAME Racoon successfully verifies certificates even when OpenSSL validation fails, which could allow remote attackers to bypass authentication.

The Internet Key Exchange version 1 (IKEv1) implementation (isakmpagg.c) in racoon in ipsec-tools before 0.6.3, when running in aggressive mode, allows remote attackers to cause a denial of service (null dereference and crash) via crafted IKE packets, as demonstrated by the PROTOS ISAKMP Test Suite for IKEv1.

The KAME racoon daemon in ipsec-tools before 0.5 allows remote attackers to cause a denial of service (crash) via malformed ISAKMP packets.

The isakmpinforecv function in src/racoon/isakmpinf.c in racoon in Ipsec-tools before 0.6.7 allows remote attackers to cause a denial of service (tunnel crash) via crafted (1) DELETE (ISAKMPNPTYPED) and (2) NOTIFY (ISAKMPNPTYPEN) messages.

Multiple memory leaks in Ipsec-tools before 0.7.2 allow remote attackers to cause a denial of service (memory consumption) via vectors involving (1) signature verification during user authentication with X.509 certificates, related to the eaycheckx509sign function in src/racoon/cryptoopenssl.c; and (2) the NAT-Traversal (aka NAT-T) keepalive implementation, related to src/racoon/nattraversal.c.

ipsec-tools upstream version 0.7.2 announcement mentions following security fix:

o Fix a remote crash in fragmentation code

http://sourceforge.net/project/shownotes.php?groupid=74601&releaseid=677611

Upstream CVS commit provides further details:

From Neil Kettle: Fix a possible null pointer dereference in fragmentation code.

http://cvsweb.netbsd.org/bsdweb.cgi/src/crypto/dist/ipsec-tools/src/racoon/isakmpfrag.c?f=h#rev1.4.6.1 http://cvsweb.netbsd.org/bsdweb.cgi/src/crypto/dist/ipsec-tools/src/racoon/isakmpfrag.c.diff?r1=1.4&r2=1.4.6.1&f=h

racoon/gssapi.c in IPsec-Tools 0.8.2 allows remote attackers to cause a denial of service (NULL pointer dereference and IKE daemon crash) via a series of crafted UDP requests.

ipsec-tools upstream version 0.7.2 announcement mentions following security fix:

o Fix a remote crash in fragmentation code

http://sourceforge.net/project/shownotes.php?groupid=74601&releaseid=677611

Upstream CVS commit provides further details:

From Neil Kettle: Fix a possible null pointer dereference in fragmentation code.

http://cvsweb.netbsd.org/bsdweb.cgi/src/crypto/dist/ipsec-tools/src/racoon/isakmpfrag.c?f=h#rev1.4.6.1 http://cvsweb.netbsd.org/bsdweb.cgi/src/crypto/dist/ipsec-tools/src/racoon/isakmpfrag.c.diff?r1=1.4&r2=1.4.6.1&f=h

ipsec-tools upstream released 0.7.1 including a fix for a memory leak in racoon daemon triggered by the invalid proposals, possibly resulting in a denial of service once daemon runs out of memory.

References: http://marc.info/?l=ipsec-tools-devel&m=121688914101709&w=2 http://bugs.gentoo.org/showbug.cgi?id=232831

Upstream patch: http://cvsweb.netbsd.org/bsdweb.cgi/src/crypto/dist/ipsec-tools/src/racoon/proposal.c.diff?r1=1.15&r2=1.16&f=h http://cvsweb.netbsd.org/bsdweb.cgi/src/crypto/dist/ipsec-tools/ChangeLog.diff?r1=1.169&r2=1.170&f=h