All vulnerabilities
CVE-2021-41773

Apache HTTP Server Path Traversal Vulnerability

Apache HTTP ServerWeb servers
Open in ThreatlineRecord JSON
CVSS
7.5High
ExploitationExploited in the wildAdded to KEV 3 Nov 2021. Known ransomware useCISA KEV
Exploit odds (EPSS)>99.9%Chance of exploitation activity in the next 30 days, higher than 99.9% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Federal deadline17 Nov 2021Remediation due date for US federal agenciesCISA KEV
CISA required actionApply updates per vendor instructions. CISA KEV

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Timeline

  1. 10 May 2021Exploit code publicMetasploit
  2. 5 Oct 2021, 08:40 UTCPublishedCVE List
  3. 3 Nov 2021Added to CISA KEVCISA KEV

Public exploit code and templates 5

  • Exploit moduleApache 2.4.49/2.4.50 Traversal RCE 10 May 2021Metasploit
  • Auxiliary moduleApache 2.4.49/2.4.50 Traversal RCE scanner 10 May 2021Metasploit
  • Webapps exploitApache HTTP Server 2.4.49 - Path Traversal & Remote Code Execution (RCE) 6 Oct 2021Exploit-DB
  • Webapps exploitApache HTTP Server 2.4.50 - Remote Code Execution (RCE) (3) 11 Nov 2021Exploit-DB
  • Scanner templateApache 2.4.49 - Path Traversal and Remote Code ExecutionNuclei

Listed so defenders can prioritize. Threatline links to the source and does not host exploit code.

Description

Apache HTTP Server contains a path traversal vulnerability that allows an attacker to perform remote code execution if files outside directories configured by Alias-like directives are not under default �require all denied� or if CGI scripts are enabled. The original patch issued under this CVE ID is insufficient, please review remediation information under CVE-2021-42013.

Text from CVE List

Affected versions 1

  • Apache HTTP Serveraffected: Apache HTTP Server 2.4 2.4.49CVE List

References 14