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AUSCERT External Security Bulletin Redistribution
ESB-2021.1666
USN-4956-1: Eventlet vulnerability
18 May 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: Eventlet
Publisher: Ubuntu
Operating System: Ubuntu
UNIX variants (UNIX, Linux, OSX)
Windows
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2021-21419
Original Bulletin:
https://ubuntu.com/security/notices/USN-4956-1
Comment: This advisory references vulnerabilities in products which run on
platforms other than Ubuntu. It is recommended that administrators
running Eventlet check for an updated version of the software for
their operating system.
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USN-4956-1: Eventlet vulnerability
17 May 2021
Eventlet could be made denial of service if it received a specially
crafted request.
Releases
o Ubuntu 21.04
o Ubuntu 20.10
o Ubuntu 20.04 LTS
Packages
o python-eventlet - concurrent networking library
Details
It was discovered that Eventlet incorrectly handled certain requests.
An attacker could possibly use this issue to cause a denial of service.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 21.04
o python3-eventlet - 0.30.0-0ubuntu1.1
Ubuntu 20.10
o python3-eventlet - 0.26.1-0ubuntu1.1
Ubuntu 20.04
o python3-eventlet - 0.25.1-2ubuntu1.1
In general, a standard system update will make all the necessary changes.
References
o CVE-2021-21419
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