AEGLIX vulnerability intelligence
CVE-2021-42013
CRITICAL · CVSS 9.8 · Analyzed
Published: 2021-10-07 · Updated: 2026-06-17 · Source: NVD
Vulnerability overview
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.
Severity and scoring
- CVSS score
- 9.8 · CRITICAL
- CVSS version
- 3.1
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-22, NVD-CWE-Other
CVSS measures technical severity; it does not establish whether this vulnerability is being exploited in your environment.
Known exploitation and remediation
Listed in CISA’s Known Exploited Vulnerabilities catalog.
- Affected product
- Apache · HTTP Server
- Added to catalog
- 2021-11-03
- Required action
- Apply updates per vendor instructions.
- CISA remediation due date
- 2021-11-17
CISA deadlines apply to the organizations covered by its directives. Confirm your own remediation requirements.
Verify affected versions and patch availability in the vendor advisory before making changes.
Affected products and versions
cpe:2.3:a:apache:http_server:2.4.49:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.4.50:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
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:*:*:*:*:*:*:*
cpe:2.3:a:oracle:jd_edwards_enterpriseone_tools:*:*:*:*:*:*:*:*
Before (exclusive): 9.2.6.0
cpe:2.3:a:oracle:secure_backup:*:*:*:*:*:*:*:*
Before (exclusive): 18.1.0.1.0
cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*
These are NVD CPE applicability entries. Some products depend on configuration conditions; consult the official record to confirm applicability.
Advisories and references
- http://jvn.jp/en/jp/JVN51106450/index.html
Third Party Advisory
- http://packetstormsecurity.com/files/164501/Apache-HTTP-Server-2.4.50-Path-Traversal-Code-Execution.html
Exploit · Third Party Advisory · VDB Entry
- http://packetstormsecurity.com/files/164609/Apache-HTTP-Server-2.4.50-Remote-Code-Execution.html
Exploit · Third Party Advisory · VDB Entry
- http://packetstormsecurity.com/files/164629/Apache-2.4.49-2.4.50-Traversal-Remote-Code-Execution.html
Exploit · Third Party Advisory · VDB Entry
- http://packetstormsecurity.com/files/164941/Apache-HTTP-Server-2.4.50-Remote-Code-Execution.html
Exploit · Third Party Advisory · VDB Entry
- http://packetstormsecurity.com/files/165089/Apache-HTTP-Server-2.4.50-CVE-2021-42013-Exploitation.html
Third Party Advisory · VDB Entry
- http://packetstormsecurity.com/files/167397/Apache-2.4.50-Remote-Code-Execution.html
Exploit · Third Party Advisory · VDB Entry
- http://www.openwall.com/lists/oss-security/2021/10/07/6
Mailing List · Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/10/08/1
Mailing List · Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/10/08/2
Mailing List · Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/10/08/3
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/2021/10/08/5
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/2021/10/09/1
Mailing List · Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/10/11/4
Mailing List · Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/10/15/3
Mailing List · Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/10/16/1
Mailing List · Third Party Advisory
- https://httpd.apache.org/security/vulnerabilities_24.html
Release Notes · Vendor Advisory
- https://lists.apache.org/thread.html/r17a4c6ce9aff662efd9459e9d1850ab4a611cb23392fc68264c72cb3%40%3Ccvs.httpd.apache.org%3E
Mailing List · Patch
- https://lists.apache.org/thread.html/r7c795cd45a3384d4d27e57618a215b0ed19cb6ca8eb070061ad5d837%40%3Cannounce.apache.org%3E
Mailing List
- https://lists.apache.org/thread.html/rb5b0e46f179f60b0c70204656bc52fcb558e961cb4d06a971e9e3efb%40%3Cusers.httpd.apache.org%3E
Mailing List
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RMIIEFINL6FUIOPD2A3M5XC6DH45Y3CC/
Release Notes
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WS5RVHOIIRECG65ZBTZY7IEJVWQSQPG3/
Release Notes
- https://security.gentoo.org/glsa/202208-20
Third Party Advisory
- https://security.netapp.com/advisory/ntap-20211029-0009/
Third Party Advisory
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-pathtrv-LAzg68cZ
Third Party Advisory
- https://www.oracle.com/security-alerts/cpuapr2022.html
Patch · Third Party Advisory
- https://www.oracle.com/security-alerts/cpujan2022.html
Patch · Third Party Advisory
- https://www.povilaika.com/apache-2-4-50-exploit/
Exploit · Third Party Advisory
- http://jvn.jp/en/jp/JVN51106450/index.html
Third Party Advisory
- http://packetstormsecurity.com/files/164501/Apache-HTTP-Server-2.4.50-Path-Traversal-Code-Execution.html
Exploit · Third Party Advisory · VDB Entry
- http://packetstormsecurity.com/files/164609/Apache-HTTP-Server-2.4.50-Remote-Code-Execution.html
Exploit · Third Party Advisory · VDB Entry
- http://packetstormsecurity.com/files/164629/Apache-2.4.49-2.4.50-Traversal-Remote-Code-Execution.html
Exploit · Third Party Advisory · VDB Entry
- http://packetstormsecurity.com/files/164941/Apache-HTTP-Server-2.4.50-Remote-Code-Execution.html
Exploit · Third Party Advisory · VDB Entry
- http://packetstormsecurity.com/files/165089/Apache-HTTP-Server-2.4.50-CVE-2021-42013-Exploitation.html
Third Party Advisory · VDB Entry
- http://packetstormsecurity.com/files/167397/Apache-2.4.50-Remote-Code-Execution.html
Exploit · Third Party Advisory · VDB Entry
- http://www.openwall.com/lists/oss-security/2021/10/07/6
Mailing List · Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/10/08/1
Mailing List · Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/10/08/2
Mailing List · Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/10/08/3
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/2021/10/08/5
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/2021/10/09/1
Mailing List · Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/10/11/4
Mailing List · Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/10/15/3
Mailing List · Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/10/16/1
Mailing List · Third Party Advisory
- https://httpd.apache.org/security/vulnerabilities_24.html
Release Notes · Vendor Advisory
- https://lists.apache.org/thread.html/r17a4c6ce9aff662efd9459e9d1850ab4a611cb23392fc68264c72cb3%40%3Ccvs.httpd.apache.org%3E
Mailing List · Patch
- https://lists.apache.org/thread.html/r7c795cd45a3384d4d27e57618a215b0ed19cb6ca8eb070061ad5d837%40%3Cannounce.apache.org%3E
Mailing List
- https://lists.apache.org/thread.html/rb5b0e46f179f60b0c70204656bc52fcb558e961cb4d06a971e9e3efb%40%3Cusers.httpd.apache.org%3E
Mailing List
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RMIIEFINL6FUIOPD2A3M5XC6DH45Y3CC/
Release Notes
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WS5RVHOIIRECG65ZBTZY7IEJVWQSQPG3/
Release Notes
- https://security.gentoo.org/glsa/202208-20
Third Party Advisory
- https://security.netapp.com/advisory/ntap-20211029-0009/
Third Party Advisory
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-pathtrv-LAzg68cZ
Third Party Advisory
- https://www.oracle.com/security-alerts/cpuapr2022.html
Patch · Third Party Advisory
- https://www.oracle.com/security-alerts/cpujan2022.html
Patch · Third Party Advisory
- https://www.povilaika.com/apache-2-4-50-exploit/
Exploit · Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-42013
US Government Resource