CVE-2011-4415 - CVE House
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Status published Low CVE-2011-4415

The ap_pregsub function in server/util.c in the Apache HTTP Server...

Vulnerability Description

The ap_pregsub function in server/util.c in the Apache HTTP Server 2.0.x through 2.0.64 and 2.2.x through 2.2.21, when the mod_setenvif module is enabled, does not restrict the size of values of environment variables, which allows local users to cause a denial of service (memory consumption or NULL pointer dereference) via a .htaccess file with a crafted SetEnvIf directive, in conjunction with a crafted HTTP request header, related to (1) the "len +=" statement and (2) the apr_pcalloc function call, a different vulnerability than CVE-2011-3607.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

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Affected Vendor

Affected Software

http server
Vulnerable Versions:
2.0, 2.0.9, 2.0.28, 2.0.32, 2.0.34, 2.0.35, 2.0.36, 2.0.37, 2.0.38, 2.0.39, 2.0.40, 2.0.41, 2.0.42, 2.0.43, 2.0.44, 2.0.45, 2.0.46, 2.0.47, 2.0.48, 2.0.49, 2.0.50, 2.0.51, 2.0.52, 2.0.53, 2.0.54, 2.0.55, 2.0.56, 2.0.57, 2.0.58, 2.0.59, 2.0.60, 2.0.61, 2.0.63, 2.0.64, 2.2.0, 2.2.1, 2.2.2, 2.2.3, 2.2.4, 2.2.6, 2.2.8, 2.2.9, 2.2.10, 2.2.11, 2.2.12, 2.2.13, 2.2.14, 2.2.15, 2.2.16, 2.2.18, 2.2.19, 2.2.20, 2.2.21

Timeline

Official Publish: November 8th, 2011
Last Modified: August 7th, 2024
Added to House: July 19th, 2026

CVSS Vectors

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.