CVE-2009-0790

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2009-04-01 · updated 2026-06-16
Weakness: CWE-20

Description

The pluto IKE daemon in Openswan and Strongswan IPsec 2.6 before 2.6.21 and 2.4 before 2.4.14, and Strongswan 4.2 before 4.2.14 and 2.8 before 2.8.9, allows remote attackers to cause a denial of service (daemon crash and restart) via a crafted (1) R_U_THERE or (2) R_U_THERE_ACK Dead Peer Detection (DPD) IPsec IKE Notification message that triggers a NULL pointer dereference related to inconsistent ISAKMP state and the lack of a phase2 state association in DPD.

Affected products

strongSwan: 2.4.0, 2.4.0a, 2.4.1, 2.4.2, 2.4.3, 2.4.4 (+28)
Xelerance Openswan: 2.4.0, 2.4.1, 2.4.2, 2.4.3, 2.4.4, 2.4.5 (+20)

References

http://download.strongswan.org/CHANGES4.txt
http://lists.opensuse.org/opensuse-security-announce/2009-04/msg00010.html
http://secunia.com/advisories/34472
http://secunia.com/advisories/34483
http://secunia.com/advisories/34494
http://secunia.com/advisories/34546
http://www.debian.org/security/2009/dsa-1759
http://www.debian.org/security/2009/dsa-1760
http://www.openswan.org/CVE-2009-0790/CVE-2009-0790.txt
http://www.redhat.com/support/errata/RHSA-2009-0402.html
http://www.securityfocus.com/archive/1/502270/100/0/threaded
http://www.securityfocus.com/bid/34296

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