USN-7206-4: rsync regression

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)