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CVE-2013-5018

Date: August 28, 2013

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.

Language: C

Severity Score

Related Resources (11)

http://strongswan.org/blog/2013/08/01/strongswan-5.1.0-released.html
http://lists.opensuse.org/opensuse-updates/2013-08/msg00050.html
http://lists.opensuse.org/opensuse-updates/2013-08/msg00022.html
http://www.securityfocus.com/bid/61564
http://secunia.com/advisories/54315
http://secunia.com/advisories/54524
http://strongswan.org/blog/2013/08/01/strongswan-denial-of-service-vulnerability-%28cve-2013-5018%29.html
https://lists.strongswan.org/pipermail/users/2013-July/009540.html
https://nvd.nist.gov/vuln/detail/CVE-2013-5018
http://lists.opensuse.org/opensuse-updates/2013-08/msg00021.html
https://www.mend.io/vulnerability-database/CVE-2013-5018

Severity Score

Weakness Type (CWE)

Buffer Errors

CWE-119

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): LOW

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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