CVE-2009-2661

Description

The asn1_length function in strongSwan 2.8 before 2.8.11, 4.2 before 4.2.17, and 4.3 before 4.3.3 does not properly handle X.509 certificates with crafted Relative Distinguished Names (RDNs), which allows remote attackers to cause a denial of service (pluto IKE daemon crash) via malformed ASN.1 data. NOTE: this is due to an incomplete fix for CVE-2009-2185.

Category

5.0
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 1.79% Top 20%
Vendor Advisory opensuse.org Vendor Advisory debian.org Vendor Advisory opensuse.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.openwall.com/lists/oss-security/2009/07/27/1 mailing list
http://download.strongswan.org/patches/07_asn1_length_patch/strongswan-4.x.x_asn1_length.patch patch
http://lists.opensuse.org/opensuse-security-announce/2009-11/msg00004.html vendor advisory
http://secunia.com/advisories/36922 third party advisory
http://www.debian.org/security/2009/dsa-1899 vendor advisory
http://www.vupen.com/english/advisories/2009/2247 vdb entry
http://up2date.astaro.com/2009/08/up2date_7505_released.html
http://lists.opensuse.org/opensuse-security-announce/2009-10/msg00001.html vendor advisory
http://download.strongswan.org/patches/07_asn1_length_patch/strongswan-4.3.x_asn1_length.patch
https://lists.strongswan.org/pipermail/announce/2009-July/000056.html patch mailing list

Frequently Asked Questions

What is the severity of CVE-2009-2661?
CVE-2009-2661 has been scored as a medium severity vulnerability.
How to fix CVE-2009-2661?
To fix CVE-2009-2661, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2009-2661 being actively exploited in the wild?
It is possible that CVE-2009-2661 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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