Uncaught Exception Affecting waitress package, versions <2.1.1-2ubuntu1


Severity

Recommended
0.0
medium
0
10

Based on Ubuntu security rating.

Threat Intelligence

EPSS
1.47% (72nd percentile)

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  • Snyk IDSNYK-UBUNTU2210-WAITRESS-3064450
  • published2 Jun 2022
  • disclosed31 May 2022

Introduced: 31 May 2022

CVE-2022-31015  (opens in a new tab)
CWE-248  (opens in a new tab)
CWE-362  (opens in a new tab)

How to fix?

Upgrade Ubuntu:22.10 waitress to version 2.1.1-2ubuntu1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream waitress package and not the waitress package as distributed by Ubuntu. See How to fix? for Ubuntu:22.10 relevant fixed versions and status.

Waitress is a Web Server Gateway Interface server for Python 2 and 3. Waitress versions 2.1.0 and 2.1.1 may terminate early due to a thread closing a socket while the main thread is about to call select(). This will lead to the main thread raising an exception that is not handled and then causing the entire application to be killed. This issue has been fixed in Waitress 2.1.2 by no longer allowing the WSGI thread to close the socket. Instead, that is always delegated to the main thread. There is no work-around for this issue. However, users using waitress behind a reverse proxy server are less likely to have issues if the reverse proxy always reads the full response.

CVSS Base Scores

version 3.1