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Vulnerability Details : CVE-2021-41773

A flaw was found in a change made to path normalization in Apache HTTP Server 2.4.49. An attacker could use a path traversal attack to map URLs to files outside the directories configured by Alias-like directives. If files outside of these directories are not protected by the usual default configuration "require all denied", these requests can succeed. If CGI scripts are also enabled for these aliased pathes, this could allow for remote code execution. This issue is known to be exploited in the wild. This issue only affects Apache 2.4.49 and not earlier versions. The fix in Apache HTTP Server 2.4.50 was found to be incomplete, see CVE-2021-42013.
Publish Date : 2021-10-05 Last Update Date : 2021-11-11
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- CVSS Scores & Vulnerability Types

CVSS Score
4.3
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact None (There is no impact to the availability of the system.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Execute CodeDirectory traversal
CWE ID 22

- Products Affected By CVE-2021-41773

# Product Type Vendor Product Version Update Edition Language
1 Application Apache Http Server 2.4.49 * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Apache Http Server 1

- References For CVE-2021-41773

http://www.openwall.com/lists/oss-security/2021/10/08/2
MLIST [oss-security] 20211008 Re: CVE-2021-42013: Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)
http://packetstormsecurity.com/files/164418/Apache-HTTP-Server-2.4.49-Path-Traversal.html
http://www.openwall.com/lists/oss-security/2021/10/07/1
MLIST [oss-security] 20211007 RE: CVE-2021-41773: Path traversal and file disclosure vulnerability in Apache HTTP Server 2.4.49
http://packetstormsecurity.com/files/164418/Apache-HTTP-Server-2.4.49-Path-Traversal-Remote-Code-Execution.html
https://security.netapp.com/advisory/ntap-20211029-0009/ CONFIRM
https://lists.apache.org/thread.html/[email protected]%3Cannounce.apache.org%3E
MLIST [announce] 20211005 CVE-2021-41773: Path traversal and file disclosure vulnerability in Apache HTTP Server 2.4.49
http://packetstormsecurity.com/files/164941/Apache-HTTP-Server-2.4.50-Remote-Code-Execution.html
http://www.openwall.com/lists/oss-security/2021/10/07/6
MLIST [oss-security] 20211007 CVE-2021-42013: Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)
http://www.openwall.com/lists/oss-security/2021/10/08/3
MLIST [oss-security] 20211008 Re: CVE-2021-42013: Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)
http://www.openwall.com/lists/oss-security/2021/10/08/6
MLIST [oss-security] 20211008 Re: CVE-2021-42013: Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)
http://www.openwall.com/lists/oss-security/2021/10/08/5
MLIST [oss-security] 20211008 Re: CVE-2021-42013: Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)
http://www.openwall.com/lists/oss-security/2021/10/09/1
MLIST [oss-security] 20211009 Re: CVE-2021-42013: Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)
http://www.openwall.com/lists/oss-security/2021/10/11/4
MLIST [oss-security] 20211011 Re: CVE-2021-42013: Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)
http://www.openwall.com/lists/oss-security/2021/10/15/3
MLIST [oss-security] 20211015 Re: CVE-2021-42013: Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)
http://packetstormsecurity.com/files/164629/Apache-2.4.49-2.4.50-Traversal-Remote-Code-Execution.html
http://www.openwall.com/lists/oss-security/2021/10/16/1
MLIST [oss-security] 20211016 Re: CVE-2021-42013: Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)
https://lists.fedoraproject.org/archives/list/[email protected]/message/RMIIEFINL6FUIOPD2A3M5XC6DH45Y3CC/
FEDORA FEDORA-2021-2a10bc68a4
http://www.openwall.com/lists/oss-security/2021/10/08/4
MLIST [oss-security] 20211008 Re: CVE-2021-42013: Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)
http://www.openwall.com/lists/oss-security/2021/10/08/1
MLIST [oss-security] 20211008 Re: CVE-2021-42013: Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)
http://www.openwall.com/lists/oss-security/2021/10/05/2
MLIST [oss-security] 20211005 CVE-2021-41773: Path traversal and file disclosure vulnerability in Apache HTTP Server 2.4.49
https://lists.apache.org/thread.html/[email protected]%3Ccvs.httpd.apache.org%3E
MLIST [httpd-cvs] 20211008 [httpd-site] branch main updated: * Align with CVE-2021-42013 based on the latest findings
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-pathtrv-LAzg68cZ
CISCO 20211007 Apache HTTP Server Vulnerabilties: October 2021
https://lists.apache.org/thread.html/[email protected]%3Cusers.httpd.apache.org%3E
MLIST [httpd-users] 20211005 [[email protected]] CVE-2021-41773: Path traversal and file disclosure vulnerability in Apache HTTP Server 2.4.49
https://lists.apache.org/thread.html/[email protected]%3Cusers.httpd.apache.org%3E
MLIST [httpd-users] 20211007 [[email protected]] CVE-2021-42013: Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)
https://lists.fedoraproject.org/archives/list/[email protected]/message/WS5RVHOIIRECG65ZBTZY7IEJVWQSQPG3/
FEDORA FEDORA-2021-aaf90ef84a
https://lists.apache.org/thread.html/[email protected]%3Cannounce.apache.org%3E
MLIST [announce] 20211007 CVE-2021-42013: Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)
https://httpd.apache.org/security/vulnerabilities_24.html

- Metasploit Modules Related To CVE-2021-41773

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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