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CVE Database

CVE-2013-5018

Impact: Moderate
Public: 2013-08-01
Bugzilla: 991215: CVE-2013-5018 strongswan: denial of service flaw in 5.0.3/5.0.4

Details

The MITRE CVE dictionary describes this issue as:

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.

Find out more about CVE-2013-5018 from the MITRE CVE dictionary and NIST NVD.

Statement

Not vulnerable. This issue did not affect the versions of openswan as shipped with Red Hat Enterprise Linux 5 or 6 as they did not include the problematic newline checks when validating ASN.1 length.

CVSS v2 metrics

NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.

Base Score: 4.3
Base Metrics: AV:N/AC:M/Au:N/C:N/I:N/A:P
Access Vector: Network
Access Complexity: Medium
Authentication: None
Confidentiality Impact: None
Integrity Impact: None
Availability Impact: Partial

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat security errata

Platform Errata Release Date

External References

http://strongswan.org/blog/2013/08/01/strongswan-denial-of-service-vulnerability-(cve-2013-5018).html

This page is generated automatically and has not been checked for errors or omissions.

For clarification or corrections please contact the Red Hat Security Response Team.