Vulnerability Monitor

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CVE-2003-0795

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.

Security Impact Summary

CVE-2003-0795 is a security vulnerability that . Impacting 3 products from gnu, from quagga, from sgi organizations running these solutions should prioritize assessment and patching.

Historical Context

Originally identified in 2003, this vulnerability predates many modern security frameworks and practices. The vulnerability landscape of that era was characterized by different threat models and less mature defense mechanisms compared to contemporary standards.

Published

2003-12-15T05:00:00.000

Last Modified

2025-04-03T01:03:51.193

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 5.0 (MEDIUM)

CVSSv2 Vector

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

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Primary
CWE-20

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	gnu	zebra	0.91a	Yes
Application	gnu	zebra	0.92a	Yes
Application	gnu	zebra	0.93a	Yes
Application	gnu	zebra	0.93b	Yes
Application	quagga	quagga	≤ 0.96.3	Yes
Application	quagga	quagga	0.95	Yes
Application	quagga	quagga	0.96	Yes
Application	quagga	quagga	0.96.1	Yes
Application	quagga	quagga	0.96.2	Yes
Application	sgi	propack	2.2.1	Yes
Application	sgi	propack	2.3	Yes

References

http://marc.info/?l=bugtraq&m=106883387304266&w=2 ([email protected])
http://secunia.com/advisories/10563 Vendor Advisory ([email protected])
http://www.debian.org/security/2004/dsa-415 Patch, Vendor Advisory ([email protected])
http://www.redhat.com/support/errata/RHSA-2003-305.html Patch, Vendor Advisory ([email protected])
http://www.redhat.com/support/errata/RHSA-2003-307.html Patch, Vendor Advisory ([email protected])
http://marc.info/?l=bugtraq&m=106883387304266&w=2 (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/10563 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.debian.org/security/2004/dsa-415 Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.redhat.com/support/errata/RHSA-2003-305.html Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.redhat.com/support/errata/RHSA-2003-307.html Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For gnu's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.