USN-7206-1: rsync vulnerabilities

Releases

• Ubuntu 24.04 LTS
• Ubuntu 22.04 LTS
• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM
• Ubuntu 14.04 ESM

Packages

• rsync - fast, versatile, remote (and local) file-copying tool

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 24.04

• rsync - 3.2.7-1ubuntu1.1

Ubuntu 22.04

• rsync - 3.2.7-0ubuntu0.22.04.3

Ubuntu 20.04

• rsync - 3.1.3-8ubuntu0.8

Ubuntu 18.04

• rsync - 3.1.2-2.1ubuntu1.6+esm1
  Available with Ubuntu Pro

Ubuntu 16.04

• rsync - 3.1.1-3ubuntu1.3+esm3
  Available with Ubuntu Pro

Ubuntu 14.04

• rsync - 3.1.0-2ubuntu0.4+esm1

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

• CVE-2024-12085
• CVE-2024-12084
• CVE-2024-12088
• CVE-2024-12087
• CVE-2024-12086
• CVE-2024-12747