Home / mailings

PDF

[USN-9084-1] Radicale vulnerability

Posted on 13 November 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-9084-1
November 12, 2026

radicale vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 LTS

Summary:

Radicale could be made to expose sensitive information over the network.

Software Description:
- radicale: simple calendar and addressbook server

Details:

It was discovered that Radicale did not delay failed authentication
attempts when using htpasswd authentication. A remote attacker could
possibly use this issue to obtain user passwords through timing or
brute-force attacks.

Update instructions:

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

Ubuntu 16.04 LTS
python-radicale 1.1.1-1ubuntu0.1~esm1
Available with Ubuntu Pro
python3-radicale 1.1.1-1ubuntu0.1~esm1
Available with Ubuntu Pro
radicale 1.1.1-1ubuntu0.1~esm1
Available with Ubuntu Pro

After a standard system update you need to restart Radicale to make all the
necessary changes.

References:
https://ubuntu.com/security/notices/USN-9084-1
CVE-2017-8342

--===============6879041330653092551==Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: OpenPGP digital signature

 

TOP