CVE-2009-1957

Description

charon/sa/ike_sa.c in the charon daemon in strongSWAN before 4.3.1 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via an invalid IKE_SA_INIT request that triggers "an incomplete state," followed by a CREATE_CHILD_SA request.

Category

5.0
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 1.74% Top 20%
Vendor Advisory debian.org Vendor Advisory opensuse.org Vendor Advisory strongswan.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://secunia.com/advisories/35296 third party advisory
http://download.strongswan.org/patches/03_invalid_ike_state_patch/strongswan-4.x.x_invalid_ike_state.patch patch
http://secunia.com/advisories/36922 third party advisory
https://lists.strongswan.org/pipermail/users/2009-May/003457.html mailing list
http://www.debian.org/security/2009/dsa-1899 vendor advisory
http://www.securityfocus.com/bid/35178 vdb entry
http://secunia.com/advisories/35685 third party advisory
http://lists.opensuse.org/opensuse-security-announce/2009-07/msg00002.html vendor advisory
http://download.strongswan.org/CHANGES4.txt patch
http://download.strongswan.org/patches/03_invalid_ike_state_patch/strongswan-4.x.x_invalid_ike_state.readme vendor advisory

Frequently Asked Questions

What is the severity of CVE-2009-1957?
CVE-2009-1957 has been scored as a medium severity vulnerability.
How to fix CVE-2009-1957?
To fix CVE-2009-1957, 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-2009-1957 being actively exploited in the wild?
It is possible that CVE-2009-1957 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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