CVE-2023-40457

Severity: unknown
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-11-11 · updated 2026-06-17
Weakness: CWE-209

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 products

extremenetworks Extremeos: 30.7.1.1

References

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

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