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CVE-2003-0795: gnu zebra Improper Input Validation

CVSS: 5.0v2.0MediumModified
Published 18-11-2003Last modified 08-08-2024
Open JSON

Vulnerability summary

CVE-2003-0795 is a medium (CVSS 5.0) Improper Input Validation vulnerability in gnu zebra. EPSS estimates a 8.43% chance of exploitation in the next 30 days, higher than 94.9% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
32/100
0100
Medium · default modelHow is this calculated?
CVSS score
5.0/10
010
Medium · v2.0 (NVD)
EPSS score
8.43%
0%100%
Low · +0.20 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1exploit-database

Timeline

  1. 18-11-2003
    PublishedVulnerability first disclosed.
  2. 08-08-2024
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

1 score · 1 source · 1 version

EPSS trend

Probability

8.43%

Chance of exploitation in the next 30 days

Percentile

95%

Versus all other CVEs

30-day change

+0.20 pp

From 8.23% on 18-09-2026

18-09-202618-10-2026
EPSS score
8.43%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • exploit-databasedoslinuxVerified

    GNU Zebra 0.9x / Quagga 0.96 - Remote Denial of Service

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Gnu1 product
  • zebra0.91a | 0.92a | 0.93a | 0.93b
Quagga1 product
  • quagga≤ 0.96.3 | 0.95 | 0.96 | 0.96.1 | 0.96.2
Sgi1 product

3 vendors · 3 products

References

5 links