Affected: rsync, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4

A heap-based buffer overflow flaw was found in the rsync daemon. This issue is due to improper handling of attacker-controlled checksum lengths (s2length) in the code. When MAX_DIGEST_LEN exceeds the fixed SUM_LENGTH (16 bytes), an attacker can write out of bounds in the sum2 buffer.

Affected: Ubuntu:Pro:14.04:LTS: rsync, Ubuntu:Pro:16.04:LTS: rsync, Ubuntu:Pro:18.04:LTS: rsync, Ubuntu:20.04:LTS: rsync, Ubuntu:22.04:LTS: rsync, Ubuntu:24.04:LTS: rsync

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)