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.

CVSS v3.0 7.5 HIGH
CVSS v2.0 4.3 MEDIUM

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:-:*:*:*:*:*:*:*

Information

Published : 2021-10-05 02:15

Updated : 2022-10-28 09:16

NVD link : CVE-2021-41773

Mitre link : CVE-2021-41773

JSON object : View

CWE

CWE-22

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

Products Affected

netapp

cloud_backup

apache

http_server

fedoraproject

fedora

oracle

instantis_enterprisetrack

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7.5 /10

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

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

JSON object

Attach tags to CVE-2021-41773

7.5^/10

4.3^/10

Attach tags to `CVE-2021-41773`