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USN-5258-1: WeeChat vulnerabilities

4 February 2022

Several security issues were fixed in WeeChat.

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Releases

Packages

  • weechat - Fast, light and extensible chat client (metapackage)

Details

Stuart Nevans Locke discovered that WeeChat's relay plugin insecurely handled
malformed websocket frames. A remote attacker in control of a server
could possibly use this issue to cause denial of service in a client.
(CVE-2021-40516)

Stuart Nevans Locke discovered that WeeChat insecurely handled certain
IRC messages. A remote attacker in control of a server could possibly use
this issue to cause denial of service in a client. This issue only affected
Ubuntu 16.04 ESM and Ubuntu 18.04 ESM. (CVE-2020-9760)

Stuart Nevans Locke discovered that WeeChat insecurely handled certain
IRC messages. A remote unauthenticated attacker could possibly use these
issues to cause denial of service in a client. These issues only affected
Ubuntu 16.04 ESM and Ubuntu 18.04 ESM. (CVE-2020-9759, CVE-2020-8955)

Joseph Bisch discovered that WeeChat's logger incorrectly handled certain
memory operations when handling log file names. A remote attacker could possibly
use this issue to cause denial of service in a client. This issue only
affected Ubuntu 16.04 ESM. (CVE-2017-14727)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 20.04
Ubuntu 18.04
Ubuntu 16.04

In general, a standard system update will make all the necessary changes.

References

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Further reading