Critical · published January 15, 2025
CVSS calls it critical at 9.8. It sits in the 99.4th percentile for exploit probability.
🔥 A heap-based buffer overflow in the rsync daemon opens the door for a sneaky attacker to control memory and wreak havoc! Think of it like a restaurant where the chef has a limited amount of counter space. If a delivery driver brings in a huge shipment without checking the order, the extra ingredients might spill over, messing up everything on the counter! An attacker could exploit this flaw to overwrite critical memory areas, leading to system crashes, unauthorized access, or even remote code execution. Imagine a malicious guest pulling the fire alarm in a packed restaurant — pandemonium could ensue!
Think of it like a restaurant where the chef has a limited amount of counter space. If a delivery driver brings in a huge shipment without checking the order, the extra ingredients might spill over, messing up everything on the counter! This vulnerability arises from improper handling of the checksum lengths in the rsync daemon, allowing an attacker to write outside the allocated memory bounds of the sum2 buffer when MAX_DIGEST_LEN exceeds the fixed SUM_LENGTH (16 bytes).
An attacker could exploit this flaw to overwrite critical memory areas, leading to system crashes, unauthorized access, or even remote code execution. Imagine a malicious guest pulling the fire alarm in a packed restaurant — pandemonium could ensue! Immediately patch rsync to the latest version to resolve this flaw. Review your rsync settings and monitor for any unusual activity that could indicate exploitation attempts. It's always wise to implement strict input validation as an additional safeguard! You’ve got this! By taking action now, you can lock down your systems and keep them safe from potential attacks! 🛡️
| Product | Versions | Fixed in |
|---|---|---|
| samba/rsync | all versions | — |
| samba/rsync | all versions | — |
| almalinux/almalinux | all versions | — |
| archlinux/arch_linux | all versions | — |
| gentoo/linux | all versions | — |
| nixos/nixos | < 24.11 | 24.11 |
| nixos/nixos | all versions | — |
| novell/suse_linux | all versions | — |
| tritondatacenter/smartos | < 20250123 | 20250123 |
| redhat/enterprise_linux | all versions | — |