CVE-2024-12084

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

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.

Remediation

Workaround:

  • Red Hat recommends filtering untrusted connections to Rsync via firewall rules on the host and on network firewall appliances. Additionally, systems which only need to provide remote Rsync access to users with known identities can enable authentication using the ```auth users``` parameter in their rsyncd configuration file (rsyncd.conf). Systems that provide anonymous read access to hosted files via Rsync, such as mirror hosts, do not have reasonable mitigation options available. We strongly urge operators using vulnerable versions of Rsync to update as soon as possible.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 15.98% Top 10%
Affected: Red Hat Red Hat Enterprise Linux 10
Affected: Red Hat Red Hat Enterprise Linux 6
Affected: Red Hat Red Hat Enterprise Linux 7
Affected: Red Hat Red Hat Enterprise Linux 8
Affected: Red Hat Red Hat Enterprise Linux 9
Affected: Red Hat Red Hat OpenShift Container Platform 4
Published at:
Updated at:

References

Link Tags
https://access.redhat.com/security/cve/CVE-2024-12084 vdb entry
https://bugzilla.redhat.com/show_bug.cgi?id=2330527 issue tracking
https://kb.cert.org/vuls/id/952657
http://www.openwall.com/lists/oss-security/2025/01/14/6
https://github.com/google/security-research/security/advisories/GHSA-p5pg-x43v-mvqj

Frequently Asked Questions

What is the severity of CVE-2024-12084?
CVE-2024-12084 has been scored as a critical severity vulnerability.
How to fix CVE-2024-12084?
As a workaround for remediating CVE-2024-12084: Red Hat recommends filtering untrusted connections to Rsync via firewall rules on the host and on network firewall appliances. Additionally, systems which only need to provide remote Rsync access to users with known identities can enable authentication using the ```auth users``` parameter in their rsyncd configuration file (rsyncd.conf). Systems that provide anonymous read access to hosted files via Rsync, such as mirror hosts, do not have reasonable mitigation options available. We strongly urge operators using vulnerable versions of Rsync to update as soon as possible.
Is CVE-2024-12084 being actively exploited in the wild?
It is possible that CVE-2024-12084 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~16% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-12084?
CVE-2024-12084 affects 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.
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