Apache HTTP Server up to 2.0.53 mod_setenvif ap_pregsub numeric error

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Apache HTTP Server up to 2.0.53. Affected by this vulnerability is the function ap_pregsub of the component mod_setenvif. This manipulation causes numeric error. The identification of this vulnerability is CVE-2011-3607. Furthermore, there is an exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Apache HTTP Server up to 2.0.53 (Web Server). It has been declared as problematic. Affected by this vulnerability is the function ap_pregsub of the component mod_setenvif. The manipulation with an unknown input leads to a numeric error vulnerability. The CWE definition for the vulnerability is CWE-189. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Integer overflow in 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, allows local users to gain privileges via a .htaccess file with a crafted SetEnvIf directive, in conjunction with a crafted HTTP request header, leading to a heap-based buffer overflow.

The weakness was shared 11/08/2011 by halfdog as Bug 750935 as confirmed bug report (Bugzilla). The advisory is shared at bugzilla.redhat.com. This vulnerability is known as CVE-2011-3607 since 09/21/2011. An attack has to be approached locally. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known.

It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 68488 (Oracle Linux 5 : httpd (ELSA-2012-0323)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 350701 (Amazon Linux Security Advisory for httpd: ALAS-2012-046).

Upgrading eliminates this vulnerability. A possible mitigation has been published 5 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (71093), Exploit-DB (41769), Tenable (68488), SecurityFocus (BID 50494†) and OSVDB (76744†). The entries VDB-68671 and VDB-59556 are related to this item. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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  • end of life (old version)

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.9
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Numeric error
CWE: CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 68488
Nessus Name: Oracle Linux 5 : httpd (ELSA-2012-0323)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 70724
OpenVAS Name: Debian Security Advisory DSA 2405-1 (apache2)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
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Timelineinfo

09/21/2011 🔍
11/02/2011 +42 days 🔍
11/02/2011 +0 days 🔍
11/02/2011 +0 days 🔍
11/08/2011 +6 days 🔍
11/08/2011 +0 days 🔍
03/09/2012 +122 days 🔍
07/12/2013 +490 days 🔍
03/23/2015 +619 days 🔍
08/10/2024 +3428 days 🔍

Sourcesinfo

Vendor: apache.org

Advisory: Bug 750935
Researcher: halfdog
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2011-3607 (🔍)
GCVE (CVE): GCVE-0-2011-3607
GCVE (VulDB): GCVE-100-59389

OVAL: 🔍

X-Force: 71093
SecurityFocus: 50494 - Apache HTTP Server 'ap_pregsub()' Function Local Privilege Escalation Vulnerability
Secunia: 45793 - Apache HTTP Server "ap_pregsub()" Privilege Escalation Vulnerability, Less Critical
OSVDB: 76744
SecurityTracker: 1026267

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 03/23/2015 16:50
Updated: 08/10/2024 06:13
Changes: 03/23/2015 16:50 (81), 04/23/2019 22:13 (5), 08/10/2024 06:13 (25)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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