Vulnerability Description
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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Apache | Http Server | 2.4.49 |
| Fedoraproject | Fedora | 34 |
| Oracle | Instantis Enterprisetrack | 17.1 |
| Oracle | Jd Edwards Enterpriseone Tools | < 9.2.6.0 |
| Oracle | Secure Backup | < 18.1.0.1.0 |
| Netapp | Cloud Backup | - |
Related Weaknesses (CWE)
References
- http://jvn.jp/en/jp/JVN51106450/index.htmlThird Party Advisory
- http://packetstormsecurity.com/files/164501/Apache-HTTP-Server-2.4.50-Path-TraveExploitThird Party AdvisoryVDB Entry
- http://packetstormsecurity.com/files/164609/Apache-HTTP-Server-2.4.50-Remote-CodExploitThird Party AdvisoryVDB Entry
- http://packetstormsecurity.com/files/164629/Apache-2.4.49-2.4.50-Traversal-RemotExploitThird Party AdvisoryVDB Entry
- http://packetstormsecurity.com/files/164941/Apache-HTTP-Server-2.4.50-Remote-CodExploitThird Party AdvisoryVDB Entry
- http://packetstormsecurity.com/files/165089/Apache-HTTP-Server-2.4.50-CVE-2021-4Third Party AdvisoryVDB Entry
- http://packetstormsecurity.com/files/167397/Apache-2.4.50-Remote-Code-Execution.ExploitThird Party AdvisoryVDB Entry
- http://www.openwall.com/lists/oss-security/2021/10/07/6Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2021/10/08/1Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2021/10/08/2Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2021/10/08/3Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2021/10/08/4Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2021/10/08/5Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2021/10/08/6Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2021/10/09/1Mailing ListThird Party Advisory
FAQ
What is CVE-2021-42013?
CVE-2021-42013 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 Ali...
How severe is CVE-2021-42013?
CVE-2021-42013 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2021-42013?
Check the references section above for vendor advisories and patch information. Affected products include: Apache Http Server, Fedoraproject Fedora, Oracle Instantis Enterprisetrack, Oracle Jd Edwards Enterpriseone Tools, Oracle Secure Backup.