Loop with Unreachable Exit Condition ('Infinite Loop') Affecting frr package, versions <8.4.4-1.1~deb12u2


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.78% (53rd percentile)

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  • Snyk IDSNYK-ECHOLATEST-FRR-19865108
  • published16 Sept 2026
  • disclosed24 Jul 2023

Introduced: 24 Jul 2023

CVE-2023-3748  (opens in a new tab)
CWE-835  (opens in a new tab)

How to fix?

Upgrade Echo:latest frr to version 8.4.4-1.1~deb12u2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream frr package and not the frr package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

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 Base Scores

version 3.1