CVE-2023-3748

frr: Inifinite loop in babld message parsing may cause DoS

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Severity

Low

Red Hat Product Security

3.5

CVSS 3.1

Review impact separately from score.

Published · April 15, 2023

Updated · November 22, 2025

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.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 3.5
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CWE-835 · Loop with Unreachable Exit Condition ('Infinite Loop')