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7.2	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Apache HTTP Server up to 2.2.21. It has been classified as problematic. The impacted element is an unknown function of the component Threaded MPM. The manipulation with the input %{cookiename}C Log Format String leads to input validation. This vulnerability is listed as CVE-2012-0021. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Apache HTTP Server up to 2.2.21 (Web Server). This issue affects an unknown code block of the component Threaded MPM. The manipulation with the input value %{cookiename}C Log Format String leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is availability. The summary by CVE is:

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.

The weakness was presented 01/26/2012 with Apache (Website). It is possible to read the advisory at h20000.www2.hp.com. The identification of this vulnerability is CVE-2012-0021 since 12/07/2011. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 80581 (Oracle Solaris Third-Party Patch Update : apache (cve_2012_0021_improper_input)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Solaris Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 185002 (HP-UX Running Apache Remote Denial of Service Vulnerability (HPSBUX02761)).

Upgrading to version 2.2.22-dev eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 12136.

The vulnerability is also documented in the databases at Tenable (80581), SecurityFocus (BID 51705†), OSVDB (78555†), Secunia (SA47779†) and SecurityTracker (ID 1026616†). See VDB-4548, VDB-4582, VDB-7810 and VDB-8308 for similar entries. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Web Server

Vendor

• Apache

Name

• HTTP Server

Version

• 2.2.0
• 2.2.1
• 2.2.2
• 2.2.3
• 2.2.4
• 2.2.5
• 2.2.6
• 2.2.7
• 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
• 2.2.17
• 2.2.18
• 2.2.19
• 2.2.20
• 2.2.21

License

• open-source

Support

• end of life (old version)

Website

• Vendor: https://www.apache.org/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 80581
Nessus Name: Oracle Solaris Third-Party Patch Update : apache (cve_2012_0021_improper_input)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 71965
OpenVAS Name: Slackware Advisory SSA:2012-041-01 httpd
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: HTTP Server 2.2.22-dev
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

ISS Proventia IPS: 🔍
PaloAlto IPS: 🔍
Fortigate IPS: 🔍

Timelineinfo

12/07/2011 🔍
01/26/2012 +50 days 🔍
01/26/2012 +0 days 🔍
01/27/2012 +1 days 🔍
01/27/2012 +0 days 🔍
01/27/2012 +0 days 🔍
01/27/2012 +0 days 🔍
01/29/2012 +2 days 🔍
02/01/2012 +3 days 🔍
02/21/2012 +20 days 🔍
01/19/2015 +1063 days 🔍
03/20/2021 +2252 days 🔍

Sourcesinfo

Vendor: apache.org

Advisory: h20000.www2.hp.com⛔
Organization: Apache
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2012-0021 (🔍)
GCVE (CVE): GCVE-0-2012-0021
GCVE (VulDB): GCVE-100-4583

OVAL: 🔍

SecurityFocus: 51705 - Apache HTTP Server CVE-2012-0021 mod_log_config Denial Of Service Vulnerability
Secunia: 47779 - Apache HTTP Server "httpOnly" Cookie Disclosure and Denial of Service, Moderately Critical
OSVDB: 78555
SecurityTracker: 1026616 - Apache Bugs Let Remote Users Deny Service and Obtain Cookie Data
Vulnerability Center: 34339 - Apache HTTP Server 2.2.17 Through 2.2.21 Remote DoS via a Specially Crafted Cookie, High

See also: 🔍

Entryinfo

Created: 02/21/2012 01:00
Updated: 03/20/2021 16:10
Changes: 02/21/2012 01:00 (80), 04/16/2019 15:11 (14), 03/20/2021 16:10 (3)
Complete: 🔍
Cache ID: 216:A74:103

Discussion

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