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.

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.

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

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

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).

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

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.

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