What’s Vulnerable › Vulnerabilities

CVE-2006-3918

• Severity: medium (CVSS 4.3 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 95.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2006-07-28 · updated 2026-06-16
• Weakness: CWE-79

Description

http_protocol.c in (1) IBM HTTP Server 6.0 before 6.0.2.13 and 6.1 before 6.1.0.1, and (2) Apache HTTP Server 1.3 before 1.3.35, 2.0 before 2.0.58, and 2.2 before 2.2.2, does not sanitize the Expect header from an HTTP request when it is reflected back in an error message, which might allow cross-site scripting (XSS) style attacks using web client components that can send arbitrary headers in requests, as demonstrated using a Flash SWF file.

Affected products

• Apache HTTP Server: from 1.3.3 before 1.3.35 — fixed in 1.3.35
• Canonical Ubuntu Linux: 6.06, 6.10, 7.04, 7.10
• Debian Linux: 3.1
• RedHat Enterprise Linux Server: 2.0
• RedHat Enterprise Linux Workstation: 2.0

How to fix

Upgrade to a fixed version: Apache HTTP Server 1.3.35. Check the vendor advisory for mitigations.

References

• http://archives.neohapsis.com/archives/bugtraq/2006-05/0151.html
• http://archives.neohapsis.com/archives/bugtraq/2006-07/0425.html
• http://kb.vmware.com/KanisaPlatform/Publishing/466/5915871_f.SAL_Public.html
• http://lists.opensuse.org/opensuse-security-announce/2008-04/msg00004.html
• http://marc.info/?l=bugtraq&m=125631037611762&w=2
• http://marc.info/?l=bugtraq&m=129190899612998&w=2
• http://marc.info/?l=bugtraq&m=130497311408250&w=2
• http://openbsd.org/errata.html#httpd2
• http://rhn.redhat.com/errata/RHSA-2006-0618.html
• http://rhn.redhat.com/errata/RHSA-2006-0692.html
• http://secunia.com/advisories/21172

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