Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

Go to Calendar     Go to Press Room     Go to Newsletters subscription

Search

CVE-2011-4415

Severity CVSS v4.0:
Pending analysis
Type:
CWE-20 Input Validation
Publication date:
08/11/2011
Last modified:
11/04/2025

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

Vector 2.0
AV:L/AC:H/Au:N/C:N/I:N/A:P CVSS v2.0 Severity and Metrics:

Base Score: 1.20 LOW
Vector: AV:L/AC:H/Au:N/C:N/I:N/A:P

Attack Vector (AV): Local
Attack Complexity (AC): High
Authentication (Au): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Physical

Base Score 2.0
1.20
Severity 2.0
LOW

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:apache:http_server:2.0:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.0.9:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.0.28:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.0.28:beta:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.0.32:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.0.32:beta:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.0.34:beta:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.0.35:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.0.36:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.0.37:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.0.38:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.0.39:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.0.40:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.0.41:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.0.42:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools