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TI-2003-00737 Aliases CVE-2003-0795GHSA-77hp-5q78-94cv

The vty layer in Quagga before 0.96.4, and Zebra 0.93b and earlier, does not verify that…

Priority LOW 34CWE-20Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · Partial
Fix status
Fixed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat.

Summary

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.

Why it matters now

EPSS 0.08431 95th percentileScored 2026-11-07
Fix Fixed Red Hat: 2 advisories

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 11

CPEVersionsRoleVendor
cpe:2.3:a:gnu:zebra:0.91a:*:*:*:*:*:*:*0.91aVulnerableGNU
cpe:2.3:a:gnu:zebra:0.92a:*:*:*:*:*:*:*0.92aVulnerableGNU
cpe:2.3:a:gnu:zebra:0.93a:*:*:*:*:*:*:*0.93aVulnerableGNU
cpe:2.3:a:gnu:zebra:0.93b:*:*:*:*:*:*:*0.93bVulnerableGNU
cpe:2.3:a:quagga:quagga:*:*:*:*:*:*:*:*up to 0.96.3VulnerableQuagga
cpe:2.3:a:quagga:quagga:0.95:*:*:*:*:*:*:*0.95VulnerableQuagga
cpe:2.3:a:quagga:quagga:0.96:*:*:*:*:*:*:*0.96VulnerableQuagga
cpe:2.3:a:quagga:quagga:0.96.1:*:*:*:*:*:*:*0.96.1VulnerableQuagga
cpe:2.3:a:quagga:quagga:0.96.2:*:*:*:*:*:*:*0.96.2VulnerableQuagga
cpe:2.3:a:sgi:propack:2.2.1:*:*:*:*:*:*:*2.2.1VulnerableSgi
  • cpe:2.3:a:gnu:zebra:0.91a:*:*:*:*:*:*:* Versions 0.91a Vulnerable ·GNU
  • cpe:2.3:a:gnu:zebra:0.92a:*:*:*:*:*:*:* Versions 0.92a Vulnerable ·GNU
  • cpe:2.3:a:gnu:zebra:0.93a:*:*:*:*:*:*:* Versions 0.93a Vulnerable ·GNU
  • cpe:2.3:a:gnu:zebra:0.93b:*:*:*:*:*:*:* Versions 0.93b Vulnerable ·GNU
  • cpe:2.3:a:quagga:quagga:*:*:*:*:*:*:*:* Versions up to 0.96.3 Vulnerable ·Quagga
  • cpe:2.3:a:quagga:quagga:0.95:*:*:*:*:*:*:* Versions 0.95 Vulnerable ·Quagga
  • cpe:2.3:a:quagga:quagga:0.96:*:*:*:*:*:*:* Versions 0.96 Vulnerable ·Quagga
  • cpe:2.3:a:quagga:quagga:0.96.1:*:*:*:*:*:*:* Versions 0.96.1 Vulnerable ·Quagga
  • cpe:2.3:a:quagga:quagga:0.96.2:*:*:*:*:*:*:* Versions 0.96.2 Vulnerable ·Quagga
  • cpe:2.3:a:sgi:propack:2.2.1:*:*:*:*:*:*:* Versions 2.2.1 Vulnerable ·Sgi
Show 1 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:sgi:propack:2.3:*:*:*:*:*:*:*2.3VulnerableSgi
  • cpe:2.3:a:sgi:propack:2.3:*:*:*:*:*:*:* Versions 2.3 Vulnerable ·Sgi

Remediation

Red Hat 2 advisories

  • RHSA-2003:307 Released 2003-11-13 · Red Hat rating Important
    : Updated zebra packages fix security vulnerabilities
    • Red Hat Linux 7.2
    • Red Hat Linux 7.3
    • Red Hat Linux 8.0
    • Red Hat Linux 9
  • RHSA-2003:305 Released 2003-11-12 · Red Hat rating Important
    zebra security update
    • Red Hat Enterprise Linux AS (Advanced Server) version 2.1
    • Red Hat Linux Advanced Workstation 2.1

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux AS (Advanced Server) version 2.1 Fixed RHSA-2003:305
Red Hat Linux 7.2Fixed RHSA-2003:307
Red Hat Linux 7.3Fixed RHSA-2003:307
Red Hat Linux 8.0Fixed RHSA-2003:307
Red Hat Linux 9Fixed RHSA-2003:307
Red Hat Linux Advanced Workstation 2.1Fixed RHSA-2003:305

Timeline

  1. 2026-10-02 Threatist record created from CVE-2003-0795
  2. 2026-10-03 Alias added: GHSA-77hp-5q78-94cv
  3. 2026-10-24 EPSS moved to the 95th–99th percentile
  4. 2026-10-25 EPSS moved to the 90th–95th percentile
  5. 2026-11-03 EPSS moved to the 95th–99th percentile

References

Patch 3

Other 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences