Ecosyste.ms: Advisories

Security Advisories: MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLTk2OGYtNjZyNS01djc0

HTTP Request Smuggling in Waitress: Invalid whitespace characters in headers (Follow-up)

Impact

The patches introduced to fix https://github.com/Pylons/waitress/security/advisories/GHSA-m5ff-3wj3-8ph4 were not complete and still would allow an attacker to smuggle requests/split a HTTP request with invalid data.

This updates the existing CVE with ID: CVE-2019-16789

Patches

Waitress version 1.4.2 has been updated to now validate HTTP headers better to avoid the issue, completely fixing all known issues with whitespace.

Workarounds

There are no work-arounds, upgrading to Waitress 1.4.2 is highly recommended.

References

See https://github.com/Pylons/waitress/security/advisories/GHSA-m5ff-3wj3-8ph4 for more information on the security issue.

For more information

If you have any questions or comments about this advisory:

• open an issue at https://github.com/Pylons/waitress/issues (if not sensitive or security related)
• email the Pylons Security mailing list: [email protected] (if security related)

Permalink: https://github.com/advisories/GHSA-968f-66r5-5v74
JSON: https://advisories.ecosyste.ms/api/v1/advisories/MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLTk2OGYtNjZyNS01djc0
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: almost 5 years ago
Updated: 2 days ago

CVSS Score: 7.1
CVSS vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:H/A:N

Identifiers: GHSA-968f-66r5-5v74, CVE-2019-16789
References:

• https://github.com/Pylons/waitress/security/advisories/GHSA-968f-66r5-5v74
• https://nvd.nist.gov/vuln/detail/CVE-2019-16789
• https://github.com/github/advisory-review/pull/14604
• https://docs.pylonsproject.org/projects/waitress/en/latest/#security-fixes
• https://access.redhat.com/errata/RHSA-2020:0720
• https://www.oracle.com/security-alerts/cpuapr2022.html
• https://lists.debian.org/debian-lts-announce/2022/05/msg00011.html
• https://github.com/Pylons/waitress/commit/ddb65b489d01d696afa1695b75fdd5df3e4ffdf8
• https://github.com/Pylons/waitress/commit/11d9e138125ad46e951027184b13242a3c1de017
• https://github.com/advisories/GHSA-968f-66r5-5v74
• https://github.com/pypa/advisory-database/tree/main/vulns/waitress/PYSEC-2019-138.yaml
• https://lists.fedoraproject.org/archives/list/[email protected]/message/GVDHR2DNKCNQ7YQXISJ45NT4IQDX3LJ7
• https://lists.fedoraproject.org/archives/list/[email protected]/message/LYEOTGWJZVKPRXX2HBNVIYWCX73QYPM5

Repository: https://github.com/Pylons/waitress
Blast Radius: 31.2

Affected Packages