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CVE-2023-3748

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Date: July 24, 2023

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.

Language: C

Severity Score

Related Resources (6)

https://access.redhat.com/security/cve/CVE-2023-3748
https://bugzilla.redhat.com/show_bug.cgi?id=2223668
https://github.com/FRRouting/frr/commit/0a95d121ca8e1f43d41d952d6c82d111ca850085
https://nvd.nist.gov/vuln/detail/CVE-2023-3748
https://security-tracker.debian.org/tracker/CVE-2023-3748
https://www.mend.io/vulnerability-database/CVE-2023-3748

Severity Score

Weakness Type (CWE)

Loop with Unreachable Exit Condition ('Infinite Loop')

CWE-835

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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