CVE-2021-41773

Description

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.

From the Tenable Blog

CVE-2021-41773: Path Traversal Zero-Day in Apache HTTP Server Exploited

Published: 2021-10-05

The Apache HTTP Server Project patched a path traversal vulnerability introduced less than a month ago that has been exploited in the wild.Update October 7: The Solution section has been updated to reflect the secondary fix the Apache HTTP Server Project released.

References

https://isc.sans.edu/diary/rss/31528

https://www.infosecurity-magazine.com/news/androxgh0st-botnet-adopts-mozi/

https://hackread.com/androxgh0st-botnet-integrate-mozi-iot-vulnerabilities/

https://www.cloudsek.com/blog/mozi-resurfaces-as-androxgh0st-botnet-unraveling-the-latest-exploitation-wave

https://www.ic3.gov/Media/News/2024/241010.pdf

https://blog.checkpoint.com/research/july-2024s-most-wanted-malware-remcos-and-ransomhub-run-rampant/

https://www.cisa.gov/news-events/cybersecurity-advisories/aa24-207a

https://isc.sans.edu/diary/rss/31086

https://thehackernews.com/2024/03/androxgh0st-malware-targets-laravel.html

https://blogs.juniper.net/en-us/security/shielding-networks-against-androxgh0st

https://www.cisa.gov/news-events/cybersecurity-advisories/aa24-016a

https://www.tenable.com/blog/aa23-215a-2022s-top-routinely-exploited-vulnerabilities

https://www.cisa.gov/news-events/cybersecurity-advisories/aa23-215a

https://www.tenable.com/blog/cisa-top-20-cves-exploited-peoples-republic-of-china-state-sponsored-actors-aa22-279a

https://www.tenable.com/cyber-exposure/a-look-inside-the-ransomware-ecosystem

https://www.tenable.com/cyber-exposure/2021-threat-landscape-retrospective

https://web.archive.org/web/20211025233339/https://twitter.com/pancak3lullz/status/1452679527197560837

https://www.tenable.com/blog/cve-2021-41773-path-traversal-zero-day-in-apache-http-server-exploited

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

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

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

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

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WS5RVHOIIRECG65ZBTZY7IEJVWQSQPG3/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RMIIEFINL6FUIOPD2A3M5XC6DH45Y3CC/

https://lists.apache.org/thread.html/rb5b0e46f179f60b0c70204656bc52fcb558e961cb4d06a971e9e3efb%40%3Cusers.httpd.apache.org%3E

https://lists.apache.org/thread.html/r98d704ed4377ed889d40479db79ed1ee2f43b2ebdd79ce84b042df45%40%3Cannounce.apache.org%3E

https://lists.apache.org/thread.html/r7c795cd45a3384d4d27e57618a215b0ed19cb6ca8eb070061ad5d837%40%3Cannounce.apache.org%3E

https://lists.apache.org/thread.html/r6abf5f2ba6f1aa8b1030f95367aaf17660c4e4c78cb2338aee18982f%40%3Cusers.httpd.apache.org%3E

https://lists.apache.org/thread.html/r17a4c6ce9aff662efd9459e9d1850ab4a611cb23392fc68264c72cb3%40%3Ccvs.httpd.apache.org%3E

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

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

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

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

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

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

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

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

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

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

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

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

http://www.openwall.com/lists/oss-security/2021/10/07/1

http://www.openwall.com/lists/oss-security/2021/10/05/2

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

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

http://packetstormsecurity.com/files/164418/Apache-HTTP-Server-2.4.49-Path-Traversal.html

http://packetstormsecurity.com/files/164418/Apache-HTTP-Server-2.4.49-Path-Traversal-Remote-Code-Execution.html

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3