CVE-2021-41773: Apache HTTP Server Path Traversal Vulnerability

CVE-2021-41773 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2021-11-03

A path traversal flaw in Apache HTTP Server 2.4.49 allows attackers to map URLs to files outside of configured directories. If CGI scripts are enabled for these aliased paths, the vulnerability can be leveraged for remote code execution.

Technologies: Apache HTTP Server. Vendors: Apache.

Quick answers

Is CVE-2021-41773 exploited in the wild?
Yes. CVE-2021-41773 is known to be exploited in the wild, first recorded on 3 November 2021. Treat it as urgent.
How severe is CVE-2021-41773?
Critical severity, with a CVSS score of 9.8, published 3 November 2021.
Which products and versions are affected?
Apache HTTP Server 2.4.49.
Is there a fix for CVE-2021-41773?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2021-41773 attacked?
It is attacked over the network, in a hosted service.
Am I affected by CVE-2021-41773?
Check whether you run Apache HTTP Server. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

  • Apache HTTP Server 2.4.49

Timeline

  • 2021-10-05: disclosed: Initial public disclosure via mailing lists
  • 2021-11-03: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
  • 2021-11-03: advisory: NVD publication date
  • exploited: Confirmed exploited in the wild

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