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CVE-2023-41361

27
FAUCET Score

CVE-2023-41361 is a critical vulnerability affecting FRRouting FRR 9.0 and related Debian distributions, stemming from a lack of length validation for the received software version in bgpd/bgp_open.c. With a CVSS score of 9.8 (CRITICAL), it presents a high-impact threat allowing for remote exploitation without user interaction, potentially leading to full compromise of confidentiality, integrity, and availability. While no public exploit code, Metasploit modules, or active exploitation have been identified, and community discussion remains minimal, the inherent severity warrants immediate attention and patching.

Impacted Technologies

VendorProductVersion(s)CPE
<= 9.0CPE matchmatch criteria
cpe:2.3:a:frrouting:frrouting:*:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.77%
Probability of exploitation in next 30 days
EPSS Percentile
52.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0077 is in the 35th percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

github_advisorypatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: 20139-17084Fixed in: 9.1-2
microsoftpatch availablevia msrc
Product: Azure Linux 3.0 x64Fixed in: 9.1-2
microsoftpatch availablevia msrc
Product: Azure Linux 3.0 ARMFixed in: 9.1-2
microsoftpatch availablevia msrc
Product: azl3 frr 8.5.3-2 on Azure Linux 3.0Fixed in: 9.1-2

Vendor Advisories (3)

microsoft2024-Jun/CVE-2023-41361

CVE-2023-41361

Jun 11, 2024
redhatCVE-2023-41361Moderate

frr: does not check for an overly large length of the rcv software version

Aug 29, 2023
microsoft2023-Aug/CVE-2023-41361Critical

An issue was discovered in FRRouting FRR 9.0. bgpd/bgp_open.c does not check for an overly large length of the rcv software version.

Aug 8, 2023

References

github.com / FRRouting/frr/pull/14241
PatchVendor Advisory
lists.debian.org / debian-lts-announce/2023/09/msg00020.html
Mailing ListThird Party Advisory