CVE-2021-42013: Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)
Apache Software Foundation · Apache HTTP Server
Vendor fix available · Affected: Apache Software Foundation Apache HTTP Server · Exploitation: in CISA KEV since 3 Nov 2021
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
ExploitationIn CISA KEV
- In CISA KEVCISA KEV catalogue3 Nov 2021
- Exploited (reported): not seen
- Scanning observed: not seen
- Proof of concept public: not seen
- Not established: not seen
Higher than 99% of scored CVEs
DescriptionCVE.org
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.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- Apache Software Foundation · Apache HTTP ServerApache HTTP Server 2.4.49; Apache HTTP Server 2.4.50
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalogue.
- CISA KEV
- Listed since 3 Nov 2021 · known ransomware use · catalogue entry
- Public check
- Apache 2.4.49/2.4.50 - Path Traversal and Remote Code Execution · nuclei template in projectdiscovery/nuclei-templates
- Published
- October 2021
- Bounty reports
- 2 disclosed on HackerOne
Disclosed bug bounty reports about CVE-2021-42013
The reports on HackerOne that name this CVE, with HackerOne's own outcome. Titles and metadata only.
- Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773) (CVE-2021-42013)Internet Bug Bounty · 2021 · critical severityValid
- Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.50Internet Bug Bounty · 2021 · critical severityValid
What changed
CoverageNo articles yet
No CyberSIXT article names CVE-2021-42013 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.
References
- NVD entrynvd.nist.gov
- CISA KEV cataloguecisa.gov
- CVE recordcve.org
- Weakness CWE-22cwe.mitre.org
- Vendor advisorytools.cisco.com
- Vendor advisorylists.fedoraproject.org
- Vendor advisorylists.fedoraproject.org
- Vendor advisorysecurity.gentoo.org
- httpd.apache.org/security/vulnerabilities_24.htmlhttpd.apache.org
- Third-party advisoryjvn.jp
- oracle.com/security-alerts/cpujan2022.htmloracle.com
- security.netapp.com/advisory/ntap-20211029-0009security.netapp.com
- packetstormsecurity.com/files/164629/Apache-2.4.49-2.4.50-Traverpacketstormsecurity.com
- packetstormsecurity.com/files/164941/Apache-HTTP-Server-2.4.50-Rpacketstormsecurity.com
- packetstormsecurity.com/files/164501/Apache-HTTP-Server-2.4.50-Ppacketstormsecurity.com
- packetstormsecurity.com/files/164609/Apache-HTTP-Server-2.4.50-Rpacketstormsecurity.com
19 more references are in the CVE record.