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Quagga / Zebra Malformed Telnet Command Denial of Service

medium Nessus Plugin ID 11925

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Synopsis

The remote routing daemon is prone to a denial of service attack.

Description

A remote denial of service vulnerability exists in Zebra and Quagga that can be triggered by sending a telnet option delimiter with no actual option data, which causes the daemon to attempt to dereference a typically NULL pointer and crash.

This affects all versions from 0.90a to 0.93b.

Solution

If using Quagga, upgrade to version 0.96.4 or later.

See Also

https://seclists.org/bugtraq/2003/Nov/151

http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=107140

Plugin Details

Severity: Medium

ID: 11925

File Name: zebra_dos.nasl

Version: 1.25

Type: remote

Published: 11/17/2003

Updated: 11/15/2018

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.2

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.9

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Vulnerability Publication Date: 11/13/2003

Reference Information

CVE: CVE-2003-0795

BID: 9029