CVE-2021-41773

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. 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.

7.5 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

4.3 /10

CVSS v2.0 : MEDIUM

V2 Legend

Vector : AV:N/AC:M/Au:N/C:P/I:N/A:N

Exploitability : 8.6 / Impact : 2.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

References
Link Resource
https://httpd.apache.org/security/vulnerabilities_24.html Vendor Advisory
https://lists.apache.org/thread.html/r6abf5f2ba6f1aa8b1030f95367aaf17660c4e4c78cb2338aee18982f@%3Cusers.httpd.apache.org%3E Mailing List Vendor Advisory
https://lists.apache.org/thread.html/r98d704ed4377ed889d40479db79ed1ee2f43b2ebdd79ce84b042df45@%3Cannounce.apache.org%3E Mailing List Vendor Advisory
http://www.openwall.com/lists/oss-security/2021/10/05/2 Mailing List Third Party Advisory
http://packetstormsecurity.com/files/164418/Apache-HTTP-Server-2.4.49-Path-Traversal.html Exploit Third Party Advisory VDB Entry
http://www.openwall.com/lists/oss-security/2021/10/07/1 Mailing List Third Party Advisory
http://packetstormsecurity.com/files/164418/Apache-HTTP-Server-2.4.49-Path-Traversal-Remote-Code-Execution.html Exploit Third Party Advisory VDB Entry
https://lists.apache.org/thread.html/r7c795cd45a3384d4d27e57618a215b0ed19cb6ca8eb070061ad5d837@%3Cannounce.apache.org%3E Mailing List Vendor Advisory
https://lists.apache.org/thread.html/rb5b0e46f179f60b0c70204656bc52fcb558e961cb4d06a971e9e3efb@%3Cusers.httpd.apache.org%3E Mailing List Vendor Advisory
http://www.openwall.com/lists/oss-security/2021/10/07/6 Mailing List Third Party Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-pathtrv-LAzg68cZ Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/10/08/1 Exploit Mailing List Third Party Advisory
https://lists.apache.org/thread.html/r17a4c6ce9aff662efd9459e9d1850ab4a611cb23392fc68264c72cb3@%3Ccvs.httpd.apache.org%3E Mailing List Patch Vendor Advisory
http://www.openwall.com/lists/oss-security/2021/10/08/2 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/10/08/4 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/10/08/3 Exploit Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/10/08/6 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/10/08/5 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/10/09/1 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/10/11/4 Mailing List Patch Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RMIIEFINL6FUIOPD2A3M5XC6DH45Y3CC/ Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WS5RVHOIIRECG65ZBTZY7IEJVWQSQPG3/ Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/10/15/3 Mailing List Patch Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/10/16/1 Mailing List Third Party Advisory
http://packetstormsecurity.com/files/164629/Apache-2.4.49-2.4.50-Traversal-Remote-Code-Execution.html Exploit Third Party Advisory VDB Entry
https://security.netapp.com/advisory/ntap-20211029-0009/ Third Party Advisory
http://packetstormsecurity.com/files/164941/Apache-HTTP-Server-2.4.50-Remote-Code-Execution.html Exploit Third Party Advisory VDB Entry
https://www.oracle.com/security-alerts/cpujan2022.html Patch Third Party Advisory
https://security.gentoo.org/glsa/202208-20 Third Party Advisory
Configurations

Configuration 1 (hide)

cpe:2.3:a:apache:http_server:2.4.49:*:*:*:*:*:*:*

Configuration 2 (hide)

OR cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*

Configuration 3 (hide)

OR cpe:2.3:a:oracle:instantis_enterprisetrack:17.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:instantis_enterprisetrack:17.2:*:*:*:*:*:*:*
cpe:2.3:a:oracle:instantis_enterprisetrack:17.3:*:*:*:*:*:*:*

Configuration 4 (hide)

cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*
History

28 Oct 2022, 16:16

Type Values Removed Values Added
References (GENTOO) https://security.gentoo.org/glsa/202208-20 - (GENTOO) https://security.gentoo.org/glsa/202208-20 - Third Party Advisory

15 Aug 2022, 11:15

Type Values Removed Values Added
References
  • (GENTOO) https://security.gentoo.org/glsa/202208-20 -

25 Mar 2022, 18:22

Type Values Removed Values Added
First Time Netapp
Oracle
Netapp cloud Backup
Oracle instantis Enterprisetrack
References (MISC) https://www.oracle.com/security-alerts/cpujan2022.html - (MISC) https://www.oracle.com/security-alerts/cpujan2022.html - Patch, Third Party Advisory
CPE cpe:2.3:a:oracle:instantis_enterprisetrack:17.2:*:*:*:*:*:*:*
cpe:2.3:a:oracle:instantis_enterprisetrack:17.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:instantis_enterprisetrack:17.3:*:*:*:*:*:*:*
cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*

07 Feb 2022, 16:16

Type Values Removed Values Added
References
  • (MISC) https://www.oracle.com/security-alerts/cpujan2022.html -

30 Nov 2021, 20:18

Type Values Removed Values Added
CPE cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
References (CONFIRM) https://security.netapp.com/advisory/ntap-20211029-0009/ - (CONFIRM) https://security.netapp.com/advisory/ntap-20211029-0009/ - Third Party Advisory
References (MLIST) http://www.openwall.com/lists/oss-security/2021/10/08/4 - Third Party Advisory (MLIST) http://www.openwall.com/lists/oss-security/2021/10/08/4 - Mailing List, Third Party Advisory
References (MLIST) http://www.openwall.com/lists/oss-security/2021/10/08/3 - Third Party Advisory (MLIST) http://www.openwall.com/lists/oss-security/2021/10/08/3 - Exploit, Mailing List, Third Party Advisory
References (MLIST) http://www.openwall.com/lists/oss-security/2021/10/09/1 - Third Party Advisory (MLIST) http://www.openwall.com/lists/oss-security/2021/10/09/1 - Mailing List, Third Party Advisory
References (MISC) http://packetstormsecurity.com/files/164629/Apache-2.4.49-2.4.50-Traversal-Remote-Code-Execution.html - (MISC) http://packetstormsecurity.com/files/164629/Apache-2.4.49-2.4.50-Traversal-Remote-Code-Execution.html - Exploit, Third Party Advisory, VDB Entry
References (MLIST) http://www.openwall.com/lists/oss-security/2021/10/07/1 - Third Party Advisory (MLIST) http://www.openwall.com/lists/oss-security/2021/10/07/1 - Mailing List, Third Party Advisory
References (MLIST) http://www.openwall.com/lists/oss-security/2021/10/11/4 - Third Party Advisory (MLIST) http://www.openwall.com/lists/oss-security/2021/10/11/4 - Mailing List, Patch, Third Party Advisory
References (MLIST) http://www.openwall.com/lists/oss-security/2021/10/08/1 - Third Party Advisory (MLIST) http://www.openwall.com/lists/oss-security/2021/10/08/1 - Exploit, Mailing List, Third Party Advisory
References (MLIST) http://www.openwall.com/lists/oss-security/2021/10/08/6 - Third Party Advisory (MLIST) http://www.openwall.com/lists/oss-security/2021/10/08/6 - Mailing List, Third Party Advisory
References (MISC) http://packetstormsecurity.com/files/164418/Apache-HTTP-Server-2.4.49-Path-Traversal-Remote-Code-Execution.html - Exploit, Third Party Advisory (MISC) http://packetstormsecurity.com/files/164418/Apache-HTTP-Server-2.4.49-Path-Traversal-Remote-Code-Execution.html - Exploit, Third Party Advisory, VDB Entry
References (MLIST) http://www.openwall.com/lists/oss-security/2021/10/15/3 - (MLIST) http://www.openwall.com/lists/oss-security/2021/10/15/3 - Mailing List, Patch, Third Party Advisory
References (MLIST) http://www.openwall.com/lists/oss-security/2021/10/08/2 - Third Party Advisory (MLIST) http://www.openwall.com/lists/oss-security/2021/10/08/2 - Mailing List, Third Party Advisory
References (MLIST) https://lists.apache.org/thread.html/r17a4c6ce9aff662efd9459e9d1850ab4a611cb23392fc68264c72cb3@%3Ccvs.httpd.apache.org%3E - Mailing List, Vendor Advisory (MLIST) https://lists.apache.org/thread.html/r17a4c6ce9aff662efd9459e9d1850ab4a611cb23392fc68264c72cb3@%3Ccvs.httpd.apache.org%3E - Mailing List, Patch, Vendor Advisory
References (MLIST) http://www.openwall.com/lists/oss-security/2021/10/16/1 - (MLIST) http://www.openwall.com/lists/oss-security/2021/10/16/1 - Mailing List, Third Party Advisory
References (MLIST) http://www.openwall.com/lists/oss-security/2021/10/08/5 - Third Party Advisory (MLIST) http://www.openwall.com/lists/oss-security/2021/10/08/5 - Mailing List, Third Party Advisory
References (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RMIIEFINL6FUIOPD2A3M5XC6DH45Y3CC/ - (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RMIIEFINL6FUIOPD2A3M5XC6DH45Y3CC/ - Mailing List, Third Party Advisory
References (MLIST) http://www.openwall.com/lists/oss-security/2021/10/07/6 - Third Party Advisory (MLIST) http://www.openwall.com/lists/oss-security/2021/10/07/6 - Mailing List, Third Party Advisory
References (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WS5RVHOIIRECG65ZBTZY7IEJVWQSQPG3/ - (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WS5RVHOIIRECG65ZBTZY7IEJVWQSQPG3/ - Mailing List, Third Party Advisory
References (MISC) http://packetstormsecurity.com/files/164941/Apache-HTTP-Server-2.4.50-Remote-Code-Execution.html - (MISC) http://packetstormsecurity.com/files/164941/Apache-HTTP-Server-2.4.50-Remote-Code-Execution.html - Exploit, Third Party Advisory, VDB Entry

11 Nov 2021, 17:15

Type Values Removed Values Added
References
  • (MISC) http://packetstormsecurity.com/files/164941/Apache-HTTP-Server-2.4.50-Remote-Code-Execution.html -

29 Oct 2021, 13:15

Type Values Removed Values Added
References
  • (CONFIRM) https://security.netapp.com/advisory/ntap-20211029-0009/ -

25 Oct 2021, 19:15

Type Values Removed Values Added
References
  • (MISC) http://packetstormsecurity.com/files/164629/Apache-2.4.49-2.4.50-Traversal-Remote-Code-Execution.html -

16 Oct 2021, 09:15

Type Values Removed Values Added
References
  • (MLIST) http://www.openwall.com/lists/oss-security/2021/10/16/1 -

15 Oct 2021, 21:15

Type Values Removed Values Added
References
  • (MLIST) http://www.openwall.com/lists/oss-security/2021/10/15/3 -

15 Oct 2021, 03:15

Type Values Removed Values Added
References
  • (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WS5RVHOIIRECG65ZBTZY7IEJVWQSQPG3/ -

13 Oct 2021, 02:15

Type Values Removed Values Added
References
  • (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RMIIEFINL6FUIOPD2A3M5XC6DH45Y3CC/ -

12 Oct 2021, 15:43

Type Values Removed Values Added
CPE cpe:2.3:a:apache:http_server:2.4.49:*:*:*:*:*:*:*
References (MISC) https://httpd.apache.org/security/vulnerabilities_24.html - (MISC) https://httpd.apache.org/security/vulnerabilities_24.html - Vendor Advisory
References (MISC) http://packetstormsecurity.com/files/164418/Apache-HTTP-Server-2.4.49-Path-Traversal.html - (MISC) http://packetstormsecurity.com/files/164418/Apache-HTTP-Server-2.4.49-Path-Traversal.html - Exploit, Third Party Advisory, VDB Entry
References (MLIST) http://www.openwall.com/lists/oss-security/2021/10/08/4 - (MLIST) http://www.openwall.com/lists/oss-security/2021/10/08/4 - Third Party Advisory
References (MLIST) https://lists.apache.org/thread.html/r98d704ed4377ed889d40479db79ed1ee2f43b2ebdd79ce84b042df45@%3Cannounce.apache.org%3E - (MLIST) https://lists.apache.org/thread.html/r98d704ed4377ed889d40479db79ed1ee2f43b2ebdd79ce84b042df45@%3Cannounce.apache.org%3E - Mailing List, Vendor Advisory
References (MLIST) http://www.openwall.com/lists/oss-security/2021/10/08/3 - (MLIST) http://www.openwall.com/lists/oss-security/2021/10/08/3 - Third Party Advisory
References (CISCO) https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-pathtrv-LAzg68cZ - (CISCO) https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-pathtrv-LAzg68cZ - Third Party Advisory
References (MLIST) http://www.openwall.com/lists/oss-security/2021/10/09/1 - (MLIST) http://www.openwall.com/lists/oss-security/2021/10/09/1 - Third Party Advisory
References (MLIST) https://lists.apache.org/thread.html/rb5b0e46f179f60b0c70204656bc52fcb558e961cb4d06a971e9e3efb@%3Cusers.httpd.apache.org%3E - (MLIST) https://lists.apache.org/thread.html/rb5b0e46f179f60b0c70204656bc52fcb558e961cb4d06a971e9e3efb@%3Cusers.httpd.apache.org%3E - Mailing List, Vendor Advisory
References (MLIST) http://www.openwall.com/lists/oss-security/2021/10/07/1 - (MLIST) http://www.openwall.com/lists/oss-security/2021/10/07/1 - Third Party Advisory
References (MLIST) https://lists.apache.org/thread.html/r6abf5f2ba6f1aa8b1030f95367aaf17660c4e4c78cb2338aee18982f@%3Cusers.httpd.apache.org%3E - (MLIST) https://lists.apache.org/thread.html/r6abf5f2ba6f1aa8b1030f95367aaf17660c4e4c78cb2338aee18982f@%3Cusers.httpd.apache.org%3E - Mailing List, Vendor Advisory
References (MLIST) http://www.openwall.com/lists/oss-security/2021/10/11/4 - (MLIST) http://www.openwall.com/lists/oss-security/2021/10/11/4 - Third Party Advisory
References (MLIST) http://www.openwall.com/lists/oss-security/2021/10/08/1 - (MLIST) http://www.openwall.com/lists/oss-security/2021/10/08/1 - Third Party Advisory
References (MLIST) http://www.openwall.com/lists/oss-security/2021/10/08/6 - (MLIST) http://www.openwall.com/lists/oss-security/2021/10/08/6 - Third Party Advisory
References (MISC) http://packetstormsecurity.com/files/164418/Apache-HTTP-Server-2.4.49-Path-Traversal-Remote-Code-Execution.html - (MISC) http://packetstormsecurity.com/files/164418/Apache-HTTP-Server-2.4.49-Path-Traversal-Remote-Code-Execution.html - Exploit, Third Party Advisory
References (MLIST) http://www.openwall.com/lists/oss-security/2021/10/08/2 - (MLIST) http://www.openwall.com/lists/oss-security/2021/10/08/2 - Third Party Advisory
References (MLIST) http://www.openwall.com/lists/oss-security/2021/10/05/2 - (MLIST) http://www.openwall.com/lists/oss-security/2021/10/05/2 - Mailing List, Third Party Advisory
References (MLIST) https://lists.apache.org/thread.html/r7c795cd45a3384d4d27e57618a215b0ed19cb6ca8eb070061ad5d837@%3Cannounce.apache.org%3E - (MLIST) https://lists.apache.org/thread.html/r7c795cd45a3384d4d27e57618a215b0ed19cb6ca8eb070061ad5d837@%3Cannounce.apache.org%3E - Mailing List, Vendor Advisory
References (MLIST) https://lists.apache.org/thread.html/r17a4c6ce9aff662efd9459e9d1850ab4a611cb23392fc68264c72cb3@%3Ccvs.httpd.apache.org%3E - (MLIST) https://lists.apache.org/thread.html/r17a4c6ce9aff662efd9459e9d1850ab4a611cb23392fc68264c72cb3@%3Ccvs.httpd.apache.org%3E - Mailing List, Vendor Advisory
References (MLIST) http://www.openwall.com/lists/oss-security/2021/10/08/5 - (MLIST) http://www.openwall.com/lists/oss-security/2021/10/08/5 - Third Party Advisory
References (MLIST) http://www.openwall.com/lists/oss-security/2021/10/07/6 - (MLIST) http://www.openwall.com/lists/oss-security/2021/10/07/6 - Third Party Advisory
CWE CWE-22
CVSS v2 : unknown
v3 : unknown 		v2 : 4.3
v3 : 7.5

11 Oct 2021, 15:15

Type Values Removed Values Added
References
  • (MLIST) http://www.openwall.com/lists/oss-security/2021/10/11/4 -

11 Oct 2021, 10:15

Type Values Removed Values Added
Summary 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 expected document root. If files outside of the document root are not protected by "require all denied" these requests can succeed. Additionally this flaw could leak the source of interpreted files like CGI scripts. This issue is known to be exploited in the wild. This issue only affects Apache 2.4.49 and not earlier versions. 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.

09 Oct 2021, 21:15

Type Values Removed Values Added
References
  • (MLIST) http://www.openwall.com/lists/oss-security/2021/10/08/6 -
  • (MLIST) http://www.openwall.com/lists/oss-security/2021/10/09/1 -
  • (MLIST) http://www.openwall.com/lists/oss-security/2021/10/08/5 -

09 Oct 2021, 00:15

Type Values Removed Values Added
References
  • (MLIST) http://www.openwall.com/lists/oss-security/2021/10/08/4 -
  • (MLIST) http://www.openwall.com/lists/oss-security/2021/10/08/3 -

08 Oct 2021, 21:15

Type Values Removed Values Added
References
  • (MLIST) http://www.openwall.com/lists/oss-security/2021/10/08/2 -

08 Oct 2021, 14:15

Type Values Removed Values Added
References
  • (MLIST) https://lists.apache.org/thread.html/r17a4c6ce9aff662efd9459e9d1850ab4a611cb23392fc68264c72cb3@%3Ccvs.httpd.apache.org%3E -

08 Oct 2021, 09:15

Type Values Removed Values Added
References
  • (MLIST) http://www.openwall.com/lists/oss-security/2021/10/08/1 -

07 Oct 2021, 23:15

Type Values Removed Values Added
References
  • (CISCO) https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-pathtrv-LAzg68cZ -

07 Oct 2021, 18:15

Type Values Removed Values Added
References
  • (MLIST) http://www.openwall.com/lists/oss-security/2021/10/07/6 -

07 Oct 2021, 17:15

Type Values Removed Values Added
References
  • (MLIST) https://lists.apache.org/thread.html/rb5b0e46f179f60b0c70204656bc52fcb558e961cb4d06a971e9e3efb@%3Cusers.httpd.apache.org%3E -
  • (MLIST) https://lists.apache.org/thread.html/r7c795cd45a3384d4d27e57618a215b0ed19cb6ca8eb070061ad5d837@%3Cannounce.apache.org%3E -

07 Oct 2021, 15:15

Type Values Removed Values Added
References
  • (MISC) http://packetstormsecurity.com/files/164418/Apache-HTTP-Server-2.4.49-Path-Traversal-Remote-Code-Execution.html -

07 Oct 2021, 12:15

Type Values Removed Values Added
References
  • (MLIST) http://www.openwall.com/lists/oss-security/2021/10/07/1 -

06 Oct 2021, 17:15

Type Values Removed Values Added
References
  • (MISC) http://packetstormsecurity.com/files/164418/Apache-HTTP-Server-2.4.49-Path-Traversal.html -

05 Oct 2021, 15:15

Type Values Removed Values Added
References
  • (MLIST) http://www.openwall.com/lists/oss-security/2021/10/05/2 -

05 Oct 2021, 13:15

Type Values Removed Values Added
References
  • (MLIST) https://lists.apache.org/thread.html/r98d704ed4377ed889d40479db79ed1ee2f43b2ebdd79ce84b042df45@%3Cannounce.apache.org%3E -
  • (MLIST) https://lists.apache.org/thread.html/r6abf5f2ba6f1aa8b1030f95367aaf17660c4e4c78cb2338aee18982f@%3Cusers.httpd.apache.org%3E -

05 Oct 2021, 09:15

Type Values Removed Values Added
New CVE
Information

Published : 2021-10-05 09:15

Updated : 2022-10-28 16:16

NVD link : CVE-2021-41773

Mitre link : CVE-2021-41773

JSON object : View

Products Affected

netapp

  • cloud_backup

fedoraproject

  • fedora

apache

  • http_server

oracle

  • instantis_enterprisetrack
CWE
CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')