CVE-2024-12084 | Rsync: heap buffer overflow in rsync due to improper checksum length handling

Exp

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.

Published: 2025-01-15 Last update: 2025-11-03 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-12084 is rated High Exploit Risk (86.7/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 4.63%). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +1.17% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2024-12084

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2024-12084

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-30 3.46% 4.63% +1.17%
2 2026-03-10 4.00% 3.46% -0.54%
3 2026-02-27 — 4.00% —

Full EPSS history (31 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-12084

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]

Weakness enumeration for CVE-2024-12084

OS Trackers for CVE-2024-12084

vendor priority summary link
alpine — CVE-2024-12084: 1 source package rows (rsync); 11 state rows across 6 repos (3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 6, open 5. https://security.alpinelinux.org/vuln/CVE-2024-12084
debian unimportant CVE-2024-12084 unimportant priority: Debian including 1 source packages (rsync), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2024-12084
gentoo high CVE-2024-12084: 1 GLSA(s) (202501-01), 1 atom(s) (net-misc/rsync); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2024-12084
redhat critical — https://access.redhat.com/security/cve/CVE-2024-12084
suse critical CVE-2024-12084 severity critical: SUSE including 250 source package names (15.7.20.5.1:rsync-3.2.7-150600.3.8.1, 2.1.3-5.3:rsync-3.2.7-4.1, …), 436 product×package rows across 171 product lines (Container bci/kiwi, Container suse/hpc/warewulf4-x86_64/sle-hpc-node, … (171 product lines)): Known Affected 231, Fixed 175, Known Not Affected 30. https://www.suse.com/security/cve/CVE-2024-12084/
ubuntu high CVE-2024-12084 high priority: Ubuntu including 1 source packages (rsync), 8 status rows across 8 suites (bionic, focal, jammy, noble, oracular, trusty, upstream, xenial): not-affected 4, released 4. https://ubuntu.com/security/CVE-2024-12084

Affected software / configurations for CVE-2024-12084

Vendor Product Version Raw CPE
samba rsync 3.2.7 cpe:2.3:a:samba:rsync:3.2.7:-:*:*:*:*:*:*
samba rsync 3.3.0 cpe:2.3:a:samba:rsync:3.3.0:-:*:*:*:*:*:*
almalinux almalinux 10.0 cpe:2.3:o:almalinux:almalinux:10.0:-:*:*:*:*:*:*
archlinux arch_linux — cpe:2.3:o:archlinux:arch_linux:-:*:*:*:*:*:*:*
gentoo linux — cpe:2.3:o:gentoo:linux:-:*:*:*:*:*:*:*
nixos nixos < 24.11 cpe:2.3:o:nixos:nixos:*:*:*:*:*:*:*:*
nixos nixos 24.11 cpe:2.3:o:nixos:nixos:24.11:*:*:*:*:*:*:*
novell suse_linux — cpe:2.3:o:novell:suse_linux:-:*:*:*:*:*:*:*
tritondatacenter smartos < 20250123 cpe:2.3:o:tritondatacenter:smartos:*:*:*:*:*:*:*:*
redhat enterprise_linux 10.0 cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*

References for CVE-2024-12084

cvelogic Threat Intelligence