CVE-2003-0795

Zebra vulnerability

CVSS

5.0

EPSS

8.2%

EPSS pct

94th

Exploited

No known

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 vendor

Gnu

Affected product

Zebra

CVSS vector

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

Weakness type (CWE)

CWE-20 — Improper Input Validation

Published

2003-12-15

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no authentication. Successful exploitation leads to partial impact to availability.

Its EPSS score of 8.2% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 94% of all scored CVEs.

Check your external exposure to CVE-2003-0795

Confirm whether Gnu Zebra is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2003-0795.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2003-0795

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