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.
Key facts
- CVSS score
- 4.3 (v2.0)
- Severity
- MEDIUM
- CVSS vector
AV:N/AC:M/Au:N/C:N/I:N/A:P- Weakness (CWE)
- CWE-119
- EPSS score
- 3.0% (87th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2013-4860)
- Published
- August 28, 2013
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2013-4860 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.
View on the EU Vulnerability DatabaseAffected products
- opensuse / opensuse
- opensuse / opensuse
- opensuse / opensuse
- strongswan / strongswan
- strongswan / strongswan
- strongswan / strongswan
- strongswan / strongswan
- strongswan / strongswan
- strongswan / strongswan
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(Vendor Advisory)
- http://secunia.com/advisories/54524(Vendor Advisory)
- http://strongswan.org/blog/2013/08/01/strongswan-5.1.0-released.html(Vendor Advisory)
- http://strongswan.org/blog/2013/08/01/strongswan-denial-of-service-vulnerability-%28cve-2013-5018%29.html(Vendor Advisory)
- http://www.securityfocus.com/bid/61564
- https://lists.strongswan.org/pipermail/users/2013-July/009540.html(Exploit)
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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