What’s Vulnerable › Vulnerabilities

CVE-2006-20001: Apache HTTP Server: mod_dav out of bounds read, or write of zero byte

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-01-17 · updated 2026-06-16
• Weakness: CWE-787

Description

A carefully crafted If: request header can cause a memory read, or write of a single zero byte, in a pool (heap) memory location beyond the header value sent. This could cause the process to crash. This issue affects Apache HTTP Server 2.4.54 and earlier.

Affected products

• Apache HTTP Server: before 2.4.55 — fixed in 2.4.55

How to fix

Upgrade to a fixed version: Apache HTTP Server 2.4.55. Check the vendor advisory for mitigations.

References

• https://httpd.apache.org/security/vulnerabilities_24.html
• https://security.gentoo.org/glsa/202309-01
• https://httpd.apache.org/security/vulnerabilities_24.html
• https://security.gentoo.org/glsa/202309-01
• https://security.netapp.com/advisory/ntap-20230316-0005/

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