From: Secunia Security Advisories (sec-advsecunia.com)
Date: Mon Jun 22 2009 - 16:47:03 CDT

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TITLE:
strongSwan ASN.1 Parsing Denial of Service Vulnerabilities

SECUNIA ADVISORY ID:
SA35522

VERIFY ADVISORY:
http://secunia.com/advisories/35522/

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 when processing ASN.1 Relative Distinguished Names can be
exploited to crash the pluto IKE daemon via a specially crafted X.509
certificate.

2) An error when converting ASN.1 UTCTIME and GENERALIZEDTIME strings
can be exploited to crash the pluto IKE daemon via a specially crafted
X.509 certificate.

The vulnerabilities are reported in versions prior to 2.8.10, 4.2.16,
and 4.3.2.

SOLUTION:
Update to version 2.8.10, 4.2.16, or 4.3.2.

Patches are also available:
http://download.strongswan.org/patches/05_asn1_rdn_patch/
http://download.strongswan.org/patches/06_asn1_time_patch/

PROVIDED AND/OR DISCOVERED BY:
The vendor credits the Orange Labs vulnerability research team.

ORIGINAL ADVISORY:
http://download.strongswan.org/patches/05_asn1_rdn_patch/strongswan-2.x.x_asn1_rdn.readme
http://download.strongswan.org/patches/06_asn1_time_patch/strongswan-2.x.x_asn1_time.readme

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