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TITLE:
strongSwan Two Denial of Service Vulnerabilities

SECUNIA ADVISORY ID:
SA35296

VERIFY ADVISORY:
http://secunia.com/advisories/35296/

DESCRIPTION:
Two vulnerabilities have been reported in strongSwan, which can be
exploited by malicious people to cause a DoS (Denial of Service).

1) An error in the IKEv2 charon daemon can be exploited to trigger a
NULL pointer dereference and cause a crash via specially crafted
IKE_SA_INIT and CREATE_CHILD_SA requests.

2) An error in the IKEv2 charon daemon can be exploited to trigger a
NULL pointer dereference and cause a crash via an IKE_AUTH request
missing a TSi or TSr payload.

The vulnerabilities are reported in versions 4.1.0 through 4.3.0.

SOLUTION:
Update to version 4.3.1 or 4.2.15, or apply patches:
http://download.strongswan.org/patches/03_invalid_ike_state_patch/
http://download.strongswan.org/patches/04_swapped_ts_check_patch/

PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.

ORIGINAL ADVISORY:
http://download.strongswan.org/patches/03_invalid_ike_state_patch/strongswan-4.x.x_invalid_ike_state.readme
http://download.strongswan.org/patches/04_swapped_ts_check_patch/strongswan-4.x.x._swapped_ts_check.readme

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