Read the docs
TI-2004-00773 Aliases CVE-2004-0836GHSA-6f26-27c8-j6cv

Buffer overflow in the mysql_real_connect function in MySQL 4.x before 4.0.21, and 3.x…

Priority MEDIUM 55CWE-119Published · Updated

Key facts

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

Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-119 and the CVSS impact.

Summary

Buffer overflow in the mysql_real_connect function in MySQL 4.x before 4.0.21, and 3.x before 3.23.49, allows remote DNS servers to cause a denial of service and possibly execute arbitrary code via a DNS response with a large address length (h_length).

Why it matters now

EPSS 0.09801 95th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
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 · 2

CPEVersionsRoleVendor
cpe:2.3:a:oracle:mysql:*:*:*:*:*:*:*:*3.20 to before 3.23.49; 4.0.0 to before 4.0.21VulnerableOracle
cpe:2.3:o:debian:debian_linux:3.0:*:*:*:*:*:*:*3.0VulnerableDebian
  • cpe:2.3:a:oracle:mysql:*:*:*:*:*:*:*:* Versions 3.20 to before 3.23.49; 4.0.0 to before 4.0.21 Vulnerable ·Oracle
  • cpe:2.3:o:debian:debian_linux:3.0:*:*:*:*:*:*:* Versions 3.0 Vulnerable ·Debian

Remediation

Red Hat 2 advisories

  • RHSA-2004:611 Released 2004-10-27 · Red Hat rating Important
    mysql-server security update
    • Red Hat Desktop version 3 Extras
  • RHSA-2004:597 Released 2004-10-20 · Red Hat rating Important
    mysql security update
    • Red Hat Enterprise Linux AS (Advanced Server) version 2.1
    • Red Hat Enterprise Linux ES version 2.1
    • Red Hat Enterprise Linux WS 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 Desktop version 3 ExtrasFixed RHSA-2004:611
Red Hat Enterprise Linux AS (Advanced Server) version 2.1 Fixed RHSA-2004:597
Red Hat Enterprise Linux ES version 2.1Fixed RHSA-2004:597
Red Hat Enterprise Linux WS version 2.1Fixed RHSA-2004:597
Red Hat Linux Advanced Workstation 2.1Fixed RHSA-2004:597

Timeline

  1. 2026-10-02 Threatist record created from CVE-2004-0836
  2. 2026-10-03 Alias added: GHSA-6f26-27c8-j6cv

References

Exploit 1

Patch 2

Advisory 7

Sources

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