CVE-2003-0795

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 8.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2003-12-15 · updated 2026-06-16
Weakness: CWE-20

Description

The vty layer in Quagga before 0.96.4, and Zebra 0.93b and earlier, does not verify that sub-negotiation is taking place when processing the SE marker, which allows remote attackers to cause a denial of service (crash) via a malformed telnet command to the telnet CLI port, which may trigger a null dereference.

Affected products

GNU Zebra: 0.91a, 0.92a, 0.93a, 0.93b
quagga: through 0.96.3; 0.95, 0.96, 0.96.1, 0.96.2
Sgi Propack: 2.2.1, 2.3

References

http://marc.info/?l=bugtraq&m=106883387304266&w=2
http://secunia.com/advisories/10563
http://www.debian.org/security/2004/dsa-415
http://www.redhat.com/support/errata/RHSA-2003-305.html
http://www.redhat.com/support/errata/RHSA-2003-307.html
http://marc.info/?l=bugtraq&m=106883387304266&w=2
http://secunia.com/advisories/10563
http://www.debian.org/security/2004/dsa-415
http://www.redhat.com/support/errata/RHSA-2003-305.html
http://www.redhat.com/support/errata/RHSA-2003-307.html

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