Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.029
EPSS Ranking 85.6%
CVSS Severity
CVSS v2 Score 4.3
References
- http://lists.opensuse.org/opensuse-updates/2013-08/msg00021.html
- http://lists.opensuse.org/opensuse-updates/2013-08/msg00022.html
- http://lists.opensuse.org/opensuse-updates/2013-08/msg00050.html
- http://secunia.com/advisories/54315
- http://secunia.com/advisories/54524
- http://strongswan.org/blog/2013/08/01/strongswan-5.1.0-released.html
- http://strongswan.org/blog/2013/08/01/strongswan-denial-of-service-vulnerability-%28cve-2013-5018%29.html
- http://www.securityfocus.com/bid/61564
- https://lists.strongswan.org/pipermail/users/2013-July/009540.html
- http://lists.opensuse.org/opensuse-updates/2013-08/msg00021.html
- http://lists.opensuse.org/opensuse-updates/2013-08/msg00022.html
- http://lists.opensuse.org/opensuse-updates/2013-08/msg00050.html
- http://secunia.com/advisories/54315
- http://secunia.com/advisories/54524
- http://strongswan.org/blog/2013/08/01/strongswan-5.1.0-released.html
- http://strongswan.org/blog/2013/08/01/strongswan-denial-of-service-vulnerability-%28cve-2013-5018%29.html
- http://www.securityfocus.com/bid/61564
- https://lists.strongswan.org/pipermail/users/2013-July/009540.html
Products affected by CVE-2013-5018
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cpe:2.3:a:strongswan:strongswan:4.1.11
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cpe:2.3:a:strongswan:strongswan:5.0.0
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cpe:2.3:a:strongswan:strongswan:5.0.1
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cpe:2.3:a:strongswan:strongswan:5.0.2
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cpe:2.3:a:strongswan:strongswan:5.0.3
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cpe:2.3:a:strongswan:strongswan:5.0.4
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cpe:2.3:o:opensuse:opensuse:11.4
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cpe:2.3:o:opensuse:opensuse:12.2
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cpe:2.3:o:opensuse:opensuse:12.3