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Fencer Vulns
critical 9.8

CVE-2024-12084 in the critical feed json

Rsync: heap buffer overflow in rsync due to improper checksum length handling

published 2025-01-15 21 mo ago modified 2026-11-04 4 d ago also EUVD-2024-50580

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
72.5%
EPSS 72.5% chance of exploitation in 30 days, percentile 99.4%
public exploits
0
none known

Summary

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.

Patch / fix

  • Red Hat Red Hat Enterprise Linux 10 0:3.4.1-2.el10
  • rsync Debian 12 3.2.7-1+deb12u1
  • rsync Debian 14, Debian 13 3.3.0+ds1-3

debian advisories DEBIAN-CVE-2024-12084

  • rsync Ubuntu 22.04 LTS 3.2.7-0ubuntu0.22.04.3
  • rsync Ubuntu 24.04 LTS 3.2.7-1ubuntu1.1

ubuntu advisories UBUNTU-CVE-2024-12084

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • rsync RHEL 10.0 3.4.1-2.el10
  • rsync-daemon RHEL 10.0 3.4.1-2.el10
  • rsync-rrsync RHEL 10.0 3.4.1-2.el10

red hat advisories RHBA-2025:6470

  • rsync Linux Micro 6.1 3.3.0-slfo.1.1_3.1
  • rsync Linux Micro 6.0 3.2.7-4.1
  • rsync SLE Module for Basesystem 15 SP6, openSUSE Leap 15.6 3.2.7-150600.3.8.1

suse advisories SUSE-SU-2025:20223-1SUSE-SU-2025:20122-1SUSE-SU-2025:0156-1

  • rsync openSUSE Tumbleweed 3.4.1-1.1

opensuse advisories openSUSE-SU-2025:14665-1

  • rsync Alpine 3.24, Alpine 3.23, Alpine 3.22 +4 more 3.4.0-r0

alpine advisories ALPINE-CVE-2024-12084

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • rsync CBL-Mariner 2.0, Azure Linux 3.0 3.4.1-1

azure linux advisories AZL-55646AZL-55691

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

  • rsync Arch Linux 3.4.0-1

arch linux advisories AVG-2858

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-12084 updated cvss 9.8

rsync: Heap Buffer Overflow in Rsync due to Improper Checksum Length Handling

  • Red Hat Enterprise Linux AppStream (v. 10) rsync-daemon 3.4.1-2.el10, rsync-rrsync 3.4.1-2.el10 Red Hat Enterprise Linux BaseOS (v. 10) rsync 3.4.1-2.el10
    fixed: vendor fix RHBA-2025:6470
  • Red Hat Enterprise Linux 6 rsync Red Hat Enterprise Linux 7 rsync Red Hat Enterprise Linux 8 rsync, rsync-daemon Red Hat Enterprise Linux 9 rsync, rsync-daemon, rsync-rrsync Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
total
Assessed
20 mo ago

Exploit prediction

72.51% chance of exploitation in the next 30 days, higher than 99.4% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/google/security-research/security/advisories/GHSA-p5pg-x43v-mvqj referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat OpenShift Container Platform 4

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.