CVE-2023-41361Network attack vector

Remote memory corruption via oversized software version

Published Aug 29, 2023 · Updated Oct 2, 2024

Buffer overflow in bgpd in FRRouting FRR 9.0 allows remote attackers to corrupt process memory via a crafted BGP OPEN message. The bgp_capability_software_version function copies the received capability length into a fixed BGP_MAX_SOFT_VERSION buffer without first limiting the length to 64 bytes. An unauthenticated BGP peer with network access can reach the parser, and the resulting overwrite can crash bgpd; public sources do not demonstrate code execution.

CVSS severity9.8
Critical
EPSS probability0.90%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in bgpd in FRRouting FRR 9.0 allows remote attackers to corrupt process memory via a crafted BGP OPEN message. The bgp_capability_software_version function copies the received capability length into a fixed BGP_MAX_SOFT_VERSION buffer without first limiting the length to 64 bytes. An unauthenticated BGP peer with network access can reach the parser, and the resulting overwrite can crash bgpd; public sources do not demonstrate code execution.

The record

CVE
CVE-2023-41361
Published
Aug 29, 2023
Updated
Oct 2, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-120, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 29, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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