RSYNC: Rsync Daemon Checksum Handling Heap-based Buffer Overflow

This signature detects attempts to exploit a known vulnerability against Rsync. A successful attack can lead to a buffer overflow and arbitrary remote code execution within the context of the Rsync.

Extended Description

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.

References

CVE: CVE-2024-12085

URL: https://download.samba.org/pub/rsync/NEWS#3.4.0 https://www.openwall.com/lists/oss-security/2025/01/14/3

Short Name

RSYNC:DAEMON-CHKSM-HEAPOF

Severity

Major

Recommended

False

Recommended Action

Drop

RSYNC: Rsync Daemon Checksum Handling Heap-based Buffer Overflow

Extended Description

References

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