Rsync server leaks arbitrary client files
CVE-2024-12086 is an information disclosure vulnerability in rsync affecting upstream versions through 3.3.0. During client-to-server transfers, the rsync protocol has the server send checksum values to the client so the client can determine what data must be transmitted. A malicious rsync server can abuse this behavior by supplying specially crafted checksum values referencing arbitrary client-side files. By observing the client’s responses, the server can infer and reconstruct the contents of those files byte-by-byte. The issue therefore allows a hostile server a client connects to for upload/synchronization to enumerate and recover arbitrary files from the client machine.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
9 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
One of a set of Rsync daemon vulnerabilities (Rsync <= 3.3.0) that can contribute to remote code execution, directory traversal, and/or sensitive information disclosure.
An information leak vulnerability in rsync.
An rsync client vulnerability that allows a malicious server to read arbitrary files.
One of several additional vulnerabilities in the Rsync server implementation for which the Rsync project released fixes.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.