CVE-2003-0795

Exp

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.

Published: 2003-12-15 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2003-0795 is rated High Exploit Risk (68.2/100): CVSS Medium severity, with high exploitation likelihood (EPSS 8.23%, 94th percentile). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2003-0795

EDB-ID Source Kind Published Link
23375 exploit_db edb 2003-11-12 Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2003-0795

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 8.01% 8.23% +0.22%
2 2025-03-30 7.25% 8.01% +0.76%
3 2025-03-29 — 7.25% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2003-0795

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2003-0795

OS Trackers for CVE-2003-0795

vendor priority summary link
redhat high — https://access.redhat.com/security/cve/CVE-2003-0795

Affected software / configurations for CVE-2003-0795

Vendor Product Version Raw CPE
gnu zebra 0.91a cpe:2.3:a:gnu:zebra:0.91a:*:*:*:*:*:*:*
gnu zebra 0.92a cpe:2.3:a:gnu:zebra:0.92a:*:*:*:*:*:*:*
gnu zebra 0.93a cpe:2.3:a:gnu:zebra:0.93a:*:*:*:*:*:*:*
gnu zebra 0.93b cpe:2.3:a:gnu:zebra:0.93b:*:*:*:*:*:*:*
quagga quagga <= 0.96.3 cpe:2.3:a:quagga:quagga:*:*:*:*:*:*:*:*
quagga quagga 0.95 cpe:2.3:a:quagga:quagga:0.95:*:*:*:*:*:*:*
quagga quagga 0.96 cpe:2.3:a:quagga:quagga:0.96:*:*:*:*:*:*:*
quagga quagga 0.96.1 cpe:2.3:a:quagga:quagga:0.96.1:*:*:*:*:*:*:*
quagga quagga 0.96.2 cpe:2.3:a:quagga:quagga:0.96.2:*:*:*:*:*:*:*
sgi propack 2.2.1 cpe:2.3:a:sgi:propack:2.2.1:*:*:*:*:*:*:*
sgi propack 2.3 cpe:2.3:a:sgi:propack:2.3:*:*:*:*:*:*:*

References for CVE-2003-0795

cvelogic Threat Intelligence