Apache HTTP Server Path Traversal Vulnerability. Actively exploited: CISA added this vulnerability to its Known Exploited Vulnerabilities catalog on 03/11/2021. Patch affected systems as an emergency. It is known to be used in ransomware campaigns.
| Package | Affected versions | Patched versions |
|---|---|---|
| http server | = 2.4.49= 2.4.50 | |
| instantis enterprisetrack | = 17.1= 17.2= 17.3 | |
| jd edwards enterpriseone tools | < 9.2.6.0 | 9.2.6.0 |
| secure backup | < 18.1.0.1.0 | 18.1.0.1.0 |
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.
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