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

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CVE-2012-0021

Severity CVSS v4.0:
Pending analysis
Type:
CWE-20 Input Validation
Publication date:
28/01/2012
Last modified:
11/04/2025

Description

The log_cookie function in mod_log_config.c in the mod_log_config module in the Apache HTTP Server 2.2.17 through 2.2.21, when a threaded MPM is used, does not properly handle a %{}C format string, which allows remote attackers to cause a denial of service (daemon crash) via a cookie that lacks both a name and a value.

Impact

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

Base Score: 2.60 LOW
Vector: AV:N/AC:H/Au:N/C:N/I:N/A:P

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

Base Score 2.0
2.60
Severity 2.0
LOW

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:apache:http_server:2.2.17:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.2.18:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.2.19:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.2.20:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.2.21:*:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools