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Mend.io Vulnerability Database

CVE-2021-42013

Good to know:

Date: October 7, 2021

It was found that the fix for CVE-2021-41773 in Apache HTTP Server 2.4.50 was insufficient. 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 only affects Apache 2.4.49 and Apache 2.4.50 and not earlier versions.

Language: C

Severity Score

9.8

Related Resources (34)

Url: https://lists.apache.org/thread.html/rb5b0e46f179f60b0c70204656bc52fcb558e961cb4d06a971e9e3efb@%3Cusers.httpd.apache.org%3E

Url: http://www.openwall.com/lists/oss-security/2021/10/11/4

Url: http://packetstormsecurity.com/files/164501/Apache-HTTP-Server-2.4.50-Path-Traversal-Code-Execution.html

Url: http://www.openwall.com/lists/oss-security/2021/10/15/3

Url: https://httpd.apache.org/security/vulnerabilities_24.html

Url: http://www.openwall.com/lists/oss-security/2021/10/16/1

Url: http://packetstormsecurity.com/files/164629/Apache-2.4.49-2.4.50-Traversal-Remote-Code-Execution.html

Url: http://jvn.jp/en/jp/JVN51106450/index.html

Url: https://www.povilaika.com/apache-2-4-50-exploit/

Url: https://security.netapp.com/advisory/ntap-20211029-0009/

Url: https://www.oracle.com/security-alerts/cpujan2022.html

Url: https://lists.apache.org/thread.html/r7c795cd45a3384d4d27e57618a215b0ed19cb6ca8eb070061ad5d837@%3Cannounce.apache.org%3E

Url: http://www.openwall.com/lists/oss-security/2021/10/08/2

Url: http://www.openwall.com/lists/oss-security/2021/10/09/1

Url: http://www.openwall.com/lists/oss-security/2021/10/08/1

Url: http://packetstormsecurity.com/files/165089/Apache-HTTP-Server-2.4.50-CVE-2021-42013-Exploitation.html

Url: https://security.alpinelinux.org/vuln/CVE-2021-42013

Url: http://www.openwall.com/lists/oss-security/2021/10/08/4

Url: https://www.oracle.com/security-alerts/cpuapr2022.html

Url: http://www.openwall.com/lists/oss-security/2021/10/08/3

Url: https://security-tracker.debian.org/tracker/CVE-2021-42013

Url: http://www.openwall.com/lists/oss-security/2021/10/08/6

Url: http://www.openwall.com/lists/oss-security/2021/10/07/6

Url: http://www.openwall.com/lists/oss-security/2021/10/08/5

Url: http://packetstormsecurity.com/files/164609/Apache-HTTP-Server-2.4.50-Remote-Code-Execution.html

Url: https://nvd.nist.gov/vuln/detail/CVE-2021-42013

Url: https://lists.apache.org/thread.html/r17a4c6ce9aff662efd9459e9d1850ab4a611cb23392fc68264c72cb3@%3Ccvs.httpd.apache.org%3E

Url: http://packetstormsecurity.com/files/167397/Apache-2.4.50-Remote-Code-Execution.html

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WS5RVHOIIRECG65ZBTZY7IEJVWQSQPG3/

Url: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-pathtrv-LAzg68cZ

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RMIIEFINL6FUIOPD2A3M5XC6DH45Y3CC/

Url: https://security.gentoo.org/glsa/202208-20

Url: http://packetstormsecurity.com/files/164941/Apache-HTTP-Server-2.4.50-Remote-Code-Execution.html

Url: https://www.mend.io/vulnerability-database/CVE-2021-42013

Severity Score

9.8

Weakness Type (CWE)

Path Traversal

CWE-22

Top Fix

Upgrade Version

Upgrade to version 2.4.51

Learn More

CVSS v3.1

Base Score:	9.8
Attack Vector (AV):	NETWORK
Attack Complexity (AC):	LOW
Privileges Required (PR):	NONE
User Interaction (UI):	NONE
Scope (S):	UNCHANGED
Confidentiality (C):	HIGH
Integrity (I):	HIGH
Availability (A):	HIGH

CVSS v2

Base Score:	7.5
Access Vector (AV):	NETWORK
Access Complexity (AC):	LOW
Authentication (AU):	NONE
Confidentiality (C):	PARTIAL
Integrity (I):	PARTIAL
Availability (A):	PARTIAL
Additional information:

Mend.io Vulnerability Database

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CVE-2021-42013

Good to know:

Date: October 7, 2021

Language: C

Severity Score

Related Resources (34)

Severity Score

Weakness Type (CWE)

Top Fix

Upgrade Version

CVSS v3.1

CVSS v2

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