CVE-2023-3748

Inifinite loop in babld message parsing may cause dos

Description

A flaw was found in FRRouting when parsing certain babeld unicast hello messages that are intended to be ignored. This issue may allow an attacker to send specially crafted hello messages with the unicast flag set, the interval field set to 0, or any TLV that contains a sub-TLV with the Mandatory flag set to enter an infinite loop and cause a denial of service.

Category

3.5
CVSS
Severity: Low
CVSS 3.1 •
EPSS 0.02%
Third-Party Advisory redhat.com Third-Party Advisory redhat.com
Affected: n/a frr
Affected: Red Hat Red Hat Enterprise Linux 8
Affected: Red Hat Red Hat Enterprise Linux 9
Affected: Fedora Fedora
Published at:
Updated at:

References

Link Tags
https://access.redhat.com/security/cve/CVE-2023-3748 third party advisory vdb entry
https://bugzilla.redhat.com/show_bug.cgi?id=2223668 third party advisory issue tracking

Frequently Asked Questions

What is the severity of CVE-2023-3748?
CVE-2023-3748 has been scored as a low severity vulnerability.
How to fix CVE-2023-3748?
To fix CVE-2023-3748, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-3748 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-3748 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-3748?
CVE-2023-3748 affects n/a frr, Red Hat Red Hat Enterprise Linux 8, Red Hat Red Hat Enterprise Linux 9, Fedora Fedora.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.