Description
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.
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Affected products
- Apache Software Foundation / Apache HTTP ServerApache HTTP Server 2.4 2.4.49 – Apache HTTP Server 2.4 2.4.49
Exploits & proofs of concept
- nucleiApache 2.4.49 - Path Traversal and Remote Code Executionby daffainfo,666asd
References
- MISChttps://httpd.apache.org/security/vulnerabilities_24.html
- MAILING_LISThttps://lists.apache.org/thread.html/r6abf5f2ba6f1aa8b1030f95367aaf17660c4e4c78cb2338aee18982f%40%3Cusers.httpd.apache.org%3E
- MAILING_LISThttps://lists.apache.org/thread.html/r98d704ed4377ed889d40479db79ed1ee2f43b2ebdd79ce84b042df45%40%3Cannounce.apache.org%3E
- MAILING_LISThttp://www.openwall.com/lists/oss-security/2021/10/05/2
- MAILING_LISThttp://www.openwall.com/lists/oss-security/2021/10/07/1
- MAILING_LISThttps://lists.apache.org/thread.html/r7c795cd45a3384d4d27e57618a215b0ed19cb6ca8eb070061ad5d837%40%3Cannounce.apache.org%3E
- MAILING_LISThttps://lists.apache.org/thread.html/rb5b0e46f179f60b0c70204656bc52fcb558e961cb4d06a971e9e3efb%40%3Cusers.httpd.apache.org%3E
- MAILING_LISThttp://www.openwall.com/lists/oss-security/2021/10/07/6
- VENDOR_ADVISORYhttps://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-pathtrv-LAzg68cZ
- MAILING_LISThttp://www.openwall.com/lists/oss-security/2021/10/08/1
- MAILING_LISThttps://lists.apache.org/thread.html/r17a4c6ce9aff662efd9459e9d1850ab4a611cb23392fc68264c72cb3%40%3Ccvs.httpd.apache.org%3E
- MAILING_LISThttp://www.openwall.com/lists/oss-security/2021/10/08/2
- MAILING_LISThttp://www.openwall.com/lists/oss-security/2021/10/08/3
- MAILING_LISThttp://www.openwall.com/lists/oss-security/2021/10/08/4
- MAILING_LISThttp://www.openwall.com/lists/oss-security/2021/10/08/6
- MAILING_LISThttp://www.openwall.com/lists/oss-security/2021/10/08/5
- MAILING_LISThttp://www.openwall.com/lists/oss-security/2021/10/09/1
- EXPLOIThttp://packetstormsecurity.com/files/164418/Apache-HTTP-Server-2.4.49-Path-Traversal.html
- EXPLOIThttp://packetstormsecurity.com/files/164418/Apache-HTTP-Server-2.4.49-Path-Traversal-Remote-Code-Execution.html
- MAILING_LISThttp://www.openwall.com/lists/oss-security/2021/10/11/4
- MAILING_LISThttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RMIIEFINL6FUIOPD2A3M5XC6DH45Y3CC/
- MAILING_LISThttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WS5RVHOIIRECG65ZBTZY7IEJVWQSQPG3/
- MAILING_LISThttp://www.openwall.com/lists/oss-security/2021/10/15/3
- MAILING_LISThttp://www.openwall.com/lists/oss-security/2021/10/16/1
- VENDOR_ADVISORYhttps://www.oracle.com/security-alerts/cpujan2022.html
- MISChttps://security.netapp.com/advisory/ntap-20211029-0009/
- EXPLOIThttp://packetstormsecurity.com/files/164629/Apache-2.4.49-2.4.50-Traversal-Remote-Code-Execution.html
- EXPLOIThttp://packetstormsecurity.com/files/164941/Apache-HTTP-Server-2.4.50-Remote-Code-Execution.html
- MISChttps://security.gentoo.org/glsa/202208-20