CVE-20XX-?
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CVE-2021-42013

9.8 CRITICAL 100% exploit odds Drop everything exploited in the wild Fix listed Disclosure Web app

Summary

Apache HTTP Server 2.4.49 and 2.4.50 are affected by an insufficient fix for CVE-2021-41773 that allows a path traversal attack to map URLs to files outside directories configured by Alias-like directives, which can lead to remote code execution if CGI scripts are enabled for these paths.

Shortened by a language model. Every number, version and name in it is checked against the description below, and it is only shown when it is clearly shorter.

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.

At a glance

Exploitability
Can be exploited over the network without logging in. High risk of data exposure, data tampering, service disruption.
In the wild
CISA lists this as exploited in real attacks. Treat as urgent.
Fix
A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

  1. ReservedThe CVE id was reserved by its CNA
  2. PublishedDisclosed publicly on CVE.org and NVD
  3. 2021-11-03 Exploited in the wildAdded to CISA's Known Exploited Vulnerabilities list
  4. 2021-11-17 Remediation deadlineCISA's due date for federal agencies to fix it
  5. Last updatedMost recent change to the record

Why it ranks here

Details

Published
Last modified
Added to CISA KEV
2021-11-03
Exploit probability
100.0% · EPSS, next 30 days
Weakness
CWE-22 · Path traversal
Record status
Analyzed

Affected

Attack profile CVSS 3.1 · 9.8

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Raw vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2021-42013.md and follow it. Check whether this project is affected by CVE-2021-42013. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record