CVE-2013-5018

The is_asn1 function in strongSwan 4.1.11 through 5.0.4 does not properly validate the return value of the asn1_length function, which allows remote attackers to cause a denial of service (segmentation fault) via a (1) XAuth username, (2) EAP identity, or (3) PEM encoded file that starts with a 0x04, 0x30, or 0x31 character followed by an ASN.1 length value that triggers an integer overflow.

🔗 References (18)

• cve@mitrehttp://lists.opensuse.org/opensuse-updates/2013-08/msg00021.html
• cve@mitrehttp://lists.opensuse.org/opensuse-updates/2013-08/msg00022.html
• cve@mitrehttp://lists.opensuse.org/opensuse-updates/2013-08/msg00050.html
• cve@mitrehttp://secunia.com/advisories/54315
• cve@mitrehttp://secunia.com/advisories/54524
• cve@mitrehttp://strongswan.org/blog/2013/08/01/strongswan-5.1.0-released.html
• cve@mitrehttp://strongswan.org/blog/2013/08/01/strongswan-denial-of-service-vulnerability-%28cve-2013-5018%29.html
• cve@mitrehttp://www.securityfocus.com/bid/61564
• cve@mitrehttps://lists.strongswan.org/pipermail/users/2013-July/009540.html
• af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-updates/2013-08/msg00021.html
• af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-updates/2013-08/msg00022.html
• af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-updates/2013-08/msg00050.html
• af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/54315
• af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/54524
• af854a3a-2127-422b-91ae-364da2661108http://strongswan.org/blog/2013/08/01/strongswan-5.1.0-released.html