[USN-7206-4] rsync regression

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==========================================================================
Ubuntu Security Notice USN-7206-4
February 10, 2025

rsync regression
==========================================================================

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

- Ubuntu 24.10

Summary:

USN-7206-3 caused some regression in rsync.

Software Description:
- rsync: fast, versatile, remote (and local) file-copying tool

Details:

USN-7206-3 fixed vulnerabilities in rsync for Ubuntu 24.10. The update
introduced a regression in rsync. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

Simon Scannell, Pedro Gallegos, and Jasiel Spelman discovered that rsync
did not properly handle checksum lengths. An attacker could use this
issue to execute arbitrary code. (CVE-2024-12084)

Simon Scannell, Pedro Gallegos, and Jasiel Spelman discovered that rsync
compared checksums with uninitialized memory. An attacker could exploit
this issue to leak sensitive information. (CVE-2024-12085)

Simon Scannell, Pedro Gallegos, and Jasiel Spelman discovered that rsync
incorrectly handled file checksums. A malicious server could use this
to expose arbitrary client files. (CVE-2024-12086)

Simon Scannell, Pedro Gallegos, and Jasiel Spelman discovered that rsync
mishandled symlinks for some settings. An attacker could exploit this
to write files outside the intended directory. (CVE-2024-12087)

Simon Scannell, Pedro Gallegos, and Jasiel Spelman discovered that rsync
failed to verify symbolic link destinations for some settings. An
attacker could exploit this for path traversal attacks. (CVE-2024-12088)

Aleksei Gorban discovered a race condition in rsync's handling of
symbolic links. An attacker could use this to access sensitive
information or escalate privileges. (CVE-2024-12747)

Update instructions:

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

Ubuntu 24.10
rsync 3.3.0-1ubuntu0.2

In general, a standard system update will make all the necessary changes.
After a standard system update you need to restart rsync daemons if
configured to make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-7206-4
https://ubuntu.com/security/notices/USN-7206-3
https://ubuntu.com/security/notices/USN-7206-2
https://ubuntu.com/security/notices/USN-7206-1
https://launchpad.net/bugs/2096914

Package Information:
https://launchpad.net/ubuntu/+source/rsync/3.3.0-1ubuntu0.2