Apache HTTP Server up to 2.4.9 mod_status race condition

CVSS Meta Temp Score
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CTI Interest Score
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6.4$0-$5k0.00

A vulnerability classified as critical has been found in Apache HTTP Server up to 2.4.9 (Web Server). This affects some unknown processing of the component mod_status. The manipulation with an unknown input leads to a race condition vulnerability. CWE is classifying the issue as CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was published 07/14/2014 by Marek Kroemeke as Fixed in Apache httpd 2.4.10-dev as confirmed advisory (Website) via ZDI (Zero Day Initiative). The advisory is shared at httpd.apache.org. This vulnerability is uniquely identified as CVE-2014-0226 since 12/03/2013. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are unknown but a public exploit is available. The advisory points out:

A race condition was found in mod_status. An attacker able to access a public server status page on a server using a threaded MPM could send a carefully crafted request which could lead to a heap buffer overflow. Note that it is not a default or recommended configuration to have a public accessible server status page.

A public exploit has been developed by Marek Kroemeke and been published 1 weeks after the advisory. The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 45 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 78331 (Amazon Linux AMI : httpd (ALAS-2014-388)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Amazon Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 185106 (HP-UX Apache Web Server Suite Remote Denial of Service Vulnerability (HPSBUX03337)).

Upgrading to version 2.4.10-dev eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (94678), Exploit-DB (34133), Tenable (78331), SecurityFocus (BID 68678†) and OSVDB (109216†). Further details are available at zerodayinitiative.com.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

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CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.4

VulDB Base Score: 7.3
VulDB Temp Score: 6.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Race condition
CWE: CWE-362
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Marek Kroemeke
Download: 🔍

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Nessus ID: 78331
Nessus Name: Amazon Linux AMI : httpd (ALAS-2014-388)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 702989
OpenVAS Name: Debian Security Advisory DSA 2989-1 (apache2 - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
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Exploit Delay Time: 🔍

Upgrade: HTTP Server 2.4.10-dev

Timelineinfo

12/03/2013 🔍
05/30/2014 +178 days 🔍
07/14/2014 +45 days 🔍
07/14/2014 +0 days 🔍
07/16/2014 +2 days 🔍
07/18/2014 +2 days 🔍
07/20/2014 +2 days 🔍
07/21/2014 +1 days 🔍
07/21/2014 +0 days 🔍
08/21/2014 +31 days 🔍
10/12/2014 +52 days 🔍
02/09/2022 +2677 days 🔍

Sourcesinfo

Vendor: apache.org

Advisory: Fixed in Apache httpd 2.4.10-dev
Researcher: Marek Kroemeke
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-0226 (🔍)
OVAL: 🔍
IAVM: 🔍

X-Force: 94678 - Apache HTTP Server mod_status buffer overflow, High Risk
SecurityFocus: 68678 - Apache HTTP Server 'mod_status' CVE-2014-0226 Remote Code Execution Vulnerability
Secunia: 60536 - SUSE update for apache2, Moderately Critical
OSVDB: 109216

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

Entryinfo

Created: 07/18/2014 11:21 AM
Updated: 02/09/2022 04:04 PM
Changes: 07/18/2014 11:21 AM (74), 04/12/2019 09:45 AM (24), 02/09/2022 04:04 PM (3)
Complete: 🔍
Cache ID: 44:E1C:40

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