CVE-2006-5873

Severity: high (CVSS 7.8 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2006-12-12 · updated 2026-06-16

Description

Buffer overflow in the cluster_process_heartbeat function in cluster.c in layer 2 tunneling protocol network server (l2tpns) before 2.1.21 allows remote attackers to cause a denial of service via a large heartbeat packet.

Affected products

Debian Linux: 3.1
L2Tpns: 1.1, 2.0.13, 2.1

References

http://l2tpns.cvs.sourceforge.net/l2tpns/l2tpns/cluster.c?r1=1.53&r2=1.54
http://secunia.com/advisories/23230
http://secunia.com/advisories/23333
http://sourceforge.net/project/shownotes.php?group_id=97282&release_id=468202
http://www.debian.org/security/2006/dsa-1230
http://www.securityfocus.com/bid/21443
http://www.vupen.com/english/advisories/2006/4860
https://exchange.xforce.ibmcloud.com/vulnerabilities/30732
http://l2tpns.cvs.sourceforge.net/l2tpns/l2tpns/cluster.c?r1=1.53&r2=1.54
http://secunia.com/advisories/23230
http://secunia.com/advisories/23333
http://sourceforge.net/project/shownotes.php?group_id=97282&release_id=468202

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