CVSS: 8.2EPSS: 20%CPEs: 37EXPL: 0CVE-2021-44224 – Possible NULL dereference or SSRF in forward proxy configurations in Apache HTTP Server 2.4.51 and earlier
https://notcve.org/view.php?id=CVE-2021-44224
A crafted URI sent to httpd configured as a forward proxy (ProxyRequests on) can cause a crash (NULL pointer dereference) or, for configurations mixing forward and reverse proxy declarations, can allow for requests to be directed to a declared Unix Domain Socket endpoint (Server Side Request Forgery). This issue affects Apache HTTP Server 2.4.7 up to 2.4.51 (included). Un URI diseñado que es enviado a httpd configurado como proxy directo (ProxyRequests on) puede causar un fallo (desreferencia de puntero NULL) o, en el caso de configuraciones que mezclan declaraciones de proxy directo e inverso, puede permitir que las peticiones se dirijan a un endpoint de socket de dominio Unix declarado (Server Side Request Forgery). Este problema afecta a Apache HTTP Server versiones 2.4.7 hasta 2.4.51 (incluyéndola) There's a null pointer dereference and server-side request forgery flaw in httpd's mod_proxy module, when it is configured to be used as a forward proxy. A crafted packet could be sent on the adjacent network to the forward proxy that could cause a crash, or potentially SSRF via misdirected Unix Domain Socket requests. • http://httpd.apache.org/security/vulnerabilities_24.html http://seclists.org/fulldisclosure/2022/May/33 http://seclists.org/fulldisclosure/2022/May/35 http://seclists.org/fulldisclosure/2022/May/38 http://www.openwall.com/lists/oss-security/2021/12/20/3 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BFSWOH4X77CV7AH7C4RMHUBDWKQDL4YH https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RGWILBORT67SHMSLYSQZG2NMXGCMPUZO https:// • CWE-476: NULL Pointer Dereference CWE-918: Server-Side Request Forgery (SSRF) •
CVSS: 9.8EPSS: 13%CPEs: 35EXPL: 2CVE-2021-44790 – Possible buffer overflow when parsing multipart content in mod_lua of Apache HTTP Server 2.4.51 and earlier
https://notcve.org/view.php?id=CVE-2021-44790
A carefully crafted request body can cause a buffer overflow in the mod_lua multipart parser (r:parsebody() called from Lua scripts). The Apache httpd team is not aware of an exploit for the vulnerabilty though it might be possible to craft one. This issue affects Apache HTTP Server 2.4.51 and earlier. Un cuerpo de petición cuidadosamente diseñado puede causar un desbordamiento de búfer en el analizador multiparte mod_lua (r:parsebody() llamado desde scripts Lua). El equipo de Apache httpd no presenta constancia de que se presente una explotación para esta vulnerabilidad, aunque podría ser posible diseñar uno. • https://www.exploit-db.com/exploits/51193 https://github.com/nuPacaChi/-CVE-2021-44790 http://httpd.apache.org/security/vulnerabilities_24.html http://packetstormsecurity.com/files/171631/Apache-2.4.x-Buffer-Overflow.html http://seclists.org/fulldisclosure/2022/May/33 http://seclists.org/fulldisclosure/2022/May/35 http://seclists.org/fulldisclosure/2022/May/38 http://www.openwall.com/lists/oss-security/2021/12/20/4 https://lists.fedoraproject.org/archives/list/package-announce • CWE-787: Out-of-bounds Write •
CVSS: 9.8EPSS: 97%CPEs: 10EXPL: 28CVE-2021-42013 – Apache HTTP Server Path Traversal Vulnerability
https://notcve.org/view.php?id=CVE-2021-42013
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. • https://www.exploit-db.com/exploits/50406 https://www.exploit-db.com/exploits/50446 https://www.exploit-db.com/exploits/50512 https://github.com/andrea-mattioli/apache-exploit-CVE-2021-42013 https://github.com/asaotomo/CVE-2021-42013-Apache-RCE-Poc-Exp https://github.com/BassoNicolas/CVE-2021-42013 https://github.com/TheLastVvV/CVE-2021-42013 https://github.com/rafifdna/CVE-2021-42013 https://github.com/rnsss/CVE-2021-42013 https://github.com/LayarKacaSiber/CVE-2021-42013 • CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') •
CVSS: 7.5EPSS: 97%CPEs: 7EXPL: 40CVE-2021-41773 – Apache HTTP Server Path Traversal Vulnerability
https://notcve.org/view.php?id=CVE-2021-41773
A flaw was found in a change made to path normalization in Apache HTTP Server 2.4.49. 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 is known to be exploited in the wild. • https://www.exploit-db.com/exploits/50512 https://www.exploit-db.com/exploits/50383 https://github.com/blasty/CVE-2021-41773 https://github.com/thehackersbrain/CVE-2021-41773 https://github.com/iilegacyyii/PoC-CVE-2021-41773 https://github.com/lorddemon/CVE-2021-41773-PoC https://github.com/0xRar/CVE-2021-41773 https://github.com/ZephrFish/CVE-2021-41773-PoC https://github.com/itsecurityco/CVE-2021-41773 https://github.com/BlueTeamSteve/CVE-2021-41773 https://github. • CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') •
CVSS: 7.5EPSS: 0%CPEs: 7EXPL: 0CVE-2021-41524 – null pointer dereference in h2 fuzzing
https://notcve.org/view.php?id=CVE-2021-41524
While fuzzing the 2.4.49 httpd, a new null pointer dereference was detected during HTTP/2 request processing, allowing an external source to DoS the server. This requires a specially crafted request. The vulnerability was recently introduced in version 2.4.49. No exploit is known to the project. Mientras se realizaba el fuzzing del httpd versión 2.4.49, se detectó una nueva desreferencia de puntero null durante el procesamiento de peticiones HTTP/2, permitiendo a una fuente externa hacer DoS al servidor. • http://www.openwall.com/lists/oss-security/2021/10/05/1 https://httpd.apache.org/security/vulnerabilities_24.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DSM6UWQICBJ2TU727RENU3HBKEAFLT6T https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EUVJVRJRBW5QVX4OY3NOHZDQ3B3YOTSG https://security.gentoo.org/glsa/202208-20 https://security.netapp.com/advisory/ntap-20211029-0009 https://tools.cisco.com/security/center/content/CiscoSecurityAd • CWE-476: NULL Pointer Dereference •