What’s Vulnerable › Vulnerabilities

CVE-2004-0747

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2004-10-20 · updated 2026-06-16
• Weakness: CWE-131

Description

Buffer overflow in Apache 2.0.50 and earlier allows local users to gain apache privileges via a .htaccess file that causes the overflow during expansion of environment variables.

Affected products

• Apache HTTP Server: from 2.0.35 before 2.0.51 — fixed in 2.0.51

How to fix

Upgrade to a fixed version: Apache HTTP Server 2.0.51. Check the vendor advisory for mitigations.

References

• http://secunia.com/advisories/12540
• http://secunia.com/advisories/34920
• http://securitytracker.com/id?1011303
• http://support.ca.com/irj/portal/anonymous/phpsupcontent?contentID=205147
• http://www.gentoo.org/security/en/glsa/glsa-200409-21.xml
• http://www.kb.cert.org/vuls/id/481998
• http://www.mandrakesecure.net/en/advisories/advisory.php?name=MDKSA-2004:096
• http://www.novell.com/linux/security/advisories/2004_32_apache2.html
• http://www.redhat.com/support/errata/RHSA-2004-463.html
• http://www.trustix.org/errata/2004/0047/
• http://www.vupen.com/english/advisories/2009/1233
• https://exchange.xforce.ibmcloud.com/vulnerabilities/17384

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