{"cve":"CVE-2023-40457","nvd":{"published":"2024-11-11T00:15:13.817","modified":"2026-06-17T06:17:56.707","status":"Deferred","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.\"","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-209"],"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/"],"products":[],"source":"nvd","synced_at":"2026-10-19T21:57:07.693694550+00:00"},"epss":{"cve":"CVE-2023-40457","score":0.00298,"percentile":0.22476,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}