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Vulnerabilities

Vulnerability · CVE-2006-3747

Off-by-one error in the ldap scheme handling in the Rewrite module (mod_rewrite) in Apache 1.3 from 1.3.28, 2.0.46 and other versions before 2.0.59, and 2.2, when Rewr…

Published Jul 28, 2006 · catalog updated Jun 16, 2026 · http server

Last checked Nov 7, 2026. A connected source was read within the last 7 days.

Check this week

CVE-2006-3747 is not in CISA KEV. FIRST estimates a 97.13% chance of exploitation in the next 30 days. Check whether you run http server.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High7.6
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
97.13%
Remediation
Version ranges on file
Affected products
cpe apache/http server · cpe canonical/ubuntu linux

Off-by-one error in the ldap scheme handling in the Rewrite module (mod_rewrite) in Apache 1.3 from 1.3.28, 2.0.46 and other versions before 2.0.59, and 2.2, when RewriteEngine is enabled, allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via crafted URLs that are not properly handled using certain rewrite rules.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe apache/http server< 1.3.37
  • cpe apache/http server< 2.0.59
  • cpe apache/http server< 2.2.3
  • cpe canonical/ubuntu linux5.04
  • cpe canonical/ubuntu linux5.10
  • cpe canonical/ubuntu linux6.06

How to fix CVE-2006-3747

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2006-3747 is not in CISA KEV. FIRST estimates a 97.13% chance of exploitation in the next 30 days. Check whether you run http server.

Which versions are affected?

Compare what you have installed with apache/http server < 1.3.37; apache/http server < 2.0.59; apache/http server < 2.2.3; canonical/ubuntu linux 5.04. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-189. EPSS 97.13%. There is no CISA KEV listing. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. Use the source links for the original advisory.

Technology hubs

Apache HTTP Server security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jul 28, 2006 · Monitored products — critical

    Detected

    Off-by-one error in the ldap scheme handling in the Rewrite module (mod_rewrite) in Apache 1.3 from 1.3.28, 2.0.46 and other versions before 2.0.59, and 2.2, when RewriteEngine is enabled, allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via crafted URLs that are not properly handled using certain rewrite rules.

  2. Jun 16, 2026 · Monitored products — critical

    Updated

    Off-by-one error in the ldap scheme handling in the Rewrite module (mod_rewrite) in Apache 1.3 from 1.3.28, 2.0.46 and other versions before 2.0.59, and 2.2, when RewriteEngine is enabled, allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via crafted URLs that are not properly handled using certain rewrite rules.

Sources

  • CVE.orgVulnerability recordCVE-2006-3747

    Official CVE identifier

    cve.org
  • Monitored products — criticalVendor advisoryCVE-2006-3747

    Off-by-one error in the ldap scheme handling in the Rewrite module (mod_rewrite) in Apache 1.3 from 1.3.28, 2.0.46 and other versions before 2.0.59, and 2.2, when RewriteEngine is enabled, allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via crafted URLs that are not properly handled using certain rewrite rules.

    nvd.nist.gov
  • Metasploit ModulesPublic exploit moduleexploit_windows/http/apache_mod_rewrite_ldap

    Public module reference (great). Module source is not copied into this catalog.

    rapid7.com

References

Freshness

Last verified in this catalog Nov 7, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • Metasploit ModulesNov 7, 2026
  • CVE.orgNov 4, 2026
  • Monitored products — criticalNov 4, 2026