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CVE-2023-40457

N/A
Published: November 10, 2024 at 12:00 AM UTC
Updated: June 17, 2026 at 06:17 AM UTC
1 product affected across 1 vendorExtremexos

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Severity
N/A
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

The BGP daemon in Extreme Networks ExtremeXOS (aka EXOS) 30.7.1.1 allows an attacker (who is not on a directly connected network) to cause a denial of service (BGP session reset) because of BGP attribute error mishandling (for attribute 21 and 25). NOTE: the vendor disputes this because it is "evaluating support for RFC 7606 as a future feature" and believes that "customers that have chosen to not require or implement RFC 7606 have done so willingly and with knowledge of what is needed to defend against these types of attacks."

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (3)

Source: [email protected]
https://blog.benjojo.co.uk/asset/JgH8G5duO1
Source: [email protected]
https://blog.benjojo.co.uk/post/bgp-path-attributes-grave-error-handling
Source: [email protected]
https://supportdocs.extremenetworks.com/support/documentation/extremexos-32-5/

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

Quick Info

StatusDEFERRED
CWE
CWE-209

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