GHSA-3f84-rpwh-47g6

Suggest an improvement
Source
https://github.com/advisories/GHSA-3f84-rpwh-47g6
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/10/GHSA-3f84-rpwh-47g6/GHSA-3f84-rpwh-47g6.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-3f84-rpwh-47g6
Aliases
Published
2024-10-29T14:33:00Z
Modified
2024-10-29T20:09:57.628079Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
Waitress vulnerable to DoS leading to high CPU usage/resource exhaustion
Details

Impact

When a remote client closes the connection before waitress has had the opportunity to call getpeername() waitress won't correctly clean up the connection leading to the main thread attempting to write to a socket that no longer exists, but not removing it from the list of sockets to attempt to process. This leads to a busy-loop calling the write function.

A remote attacker could run waitress out of available sockets with very little resources required.

Patches

Waitress 3.0.1 contains fixes that remove the race condition.

Workarounds

No work-around.

References

  • https://github.com/Pylons/waitress/issues/418
  • https://github.com/Pylons/waitress/pull/435
References

Affected packages

PyPI / waitress

Package

Name
waitress
View open source insights on deps.dev
Purl
pkg:pypi/waitress

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.0.1

Affected versions

0.*

0.1
0.2
0.3
0.4
0.5
0.6
0.6.1
0.7
0.8
0.8.1
0.8.2
0.8.3
0.8.4
0.8.5
0.8.6
0.8.7
0.8.8
0.8.9
0.8.10
0.8.11b0
0.9.0b0
0.9.0b1
0.9.0

1.*

1.0a1
1.0a2
1.0.0
1.0.1
1.0.2
1.1.0
1.2.0b1
1.2.0b2
1.2.0b3
1.2.0
1.2.1
1.3.0b0
1.3.0
1.3.1
1.4.0
1.4.1
1.4.2
1.4.3
1.4.4

2.*

2.0.0b0
2.0.0b1
2.0.0
2.1.0b0
2.1.0
2.1.1
2.1.2

3.*

3.0.0