Denial of Service Vulnerability in Quagga and Zebra Telnet CLI Port

CVE-2003-0795 · MEDIUM Severity

AV:N/AC:L/AU:N/C:N/I:N/A:P

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.

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