CVE-2019-16792

Aliases:GHSA-4ppp-gpcr-7qf6GHSA-j7j6-7hfx-5522PYSEC-2020-178
Advisory lineage Upstream: 0 Downstream: 10
Modified
Published: 22 Jan 2020, 18:30
Last modified:05 Aug 2024, 01:24

Vulnerability Summary

Overall Risk (default)
medium
30/100
CVSS Score
7.5 HIGH
v3.1 (nvd)
EPSS Score
0.85% LOW
1% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

22 Jan 2020, 18:30
Published
Vulnerability first disclosed
05 Aug 2024, 01:24
Last Modified
Vulnerability information updated

Description

Waitress through version 1.3.1 allows request smuggling by sending the Content-Length header twice. Waitress would header fold a double Content-Length header and due to being unable to cast the now comma separated value to an integer would set the Content-Length to 0 internally. If two Content-Length headers are sent in a single request, Waitress would treat the request as having no body, thereby treating the body of the request as a new request in HTTP pipelining. This issue is fixed in Waitress 1.4.0.

CVSS Metrics

  • v3.1•HIGH•Score: 7.1CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N
  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
  • v2.0•MEDIUM•Score: 5AV:N/AC:L/Au:N/C:N/I:P/A:N

EPSS Trends

Current EPSS score: 0.85%• Percentile: 75%

Techniques & Countermeasures

  • CWE-444•Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

    The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination.

Affected Systems

  • agendaless•waitress

    ≤ 1.3.1

  • debian•debian_linux

    9.0

  • oracle•communications_cloud_native_core_network_function_cloud_native_environment

    1.10.0

  • pylons•waitress

    ≥ <= 1.3.1, ≤ 1.3.1

  • PyPI•waitress

    < 575994cd42e83fd772a5f7ec98b2c56751bd3f65 | < 1.4.0

References (9)