CRITICAL🚩 CISA KEV⚡ EXPLOIT✓ PATCH🇵🇱 Wersja polska

CVE-2021-42013

CVSS 9.8v3.1pub. 2021-10-07upd. 2025-10-27

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.

CVSS Vector

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

Apache HTTP Server
APP
Apache
2.4.492.4.50
Fedora Project Fedora
OS
Fedoraproject
3435
Netapp Cloud Backup
APP
Netapp
wszystkie wersje
Oracle Instantis Enterprisetrack
APP
Oracle
17.117.217.3
Oracle Jd Edwards Enterpriseone Tools
APP
Oracle
< 9.2.6.0
Oracle Secure Backup
APP
Oracle
< 18.1.0.1.0

CISA KEV — detailsi

Vendori: Apache ↗
Producti: HTTP Server
Added to KEVi: November 3, 2021
Remediation deadline (US Federal)i: November 17, 2021(overdue)
Ransomwarei: Active ransomware campaigns exploit this vulnerability

🔧Advisory Apache↗🇺🇸CISA KEV (original)↗

Required action (CISA)i

Apply updates per vendor instructions.

CISA descriptioni

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. This CVE ID resolves an incomplete patch for CVE-2021-41773.

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