CVE-2004-0837

Severity: low (CVSS 2.6 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.9% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2004-11-03 · updated 2026-06-16

Description

MySQL 4.x before 4.0.21, and 3.x before 3.23.49, allows attackers to cause a denial of service (crash or hang) via multiple threads that simultaneously alter MERGE table UNIONs.

Affected products

Debian Linux: 3.0
Mysql: 4.1.0
MySQL Server: from 3.20 before 3.23.49; from 4.0.0 before 4.0.21 — fixed in 3.23.49, 4.0.21

How to fix

Upgrade to a fixed version: MySQL Server 3.23.49, 4.0.21. Check the vendor advisory for mitigations.

References

http://bugs.mysql.com/2408
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000892
http://lists.mysql.com/internals/16168
http://lists.mysql.com/internals/16173
http://lists.mysql.com/internals/16174
http://marc.info/?l=bugtraq&m=110140517515735&w=2
http://mysql.bkbits.net:8080/mysql-3.23/diffs/myisammrg/myrg_open.c%401.15
http://secunia.com/advisories/12783/
http://securitytracker.com/id?1011606
http://sunsolve.sun.com/search/document.do?assetkey=1-26-101864-1
http://www.ciac.org/ciac/bulletins/p-018.shtml
http://www.debian.org/security/2004/dsa-562

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