CVE-2023-40457 Denial of service in n/a
An unauthenticated remote attacker can cause a denial of service by resetting BGP sessions through mishandled attribute errors in ExtremeXOS.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-40457?
CVE-2023-40457 is a denial of service vulnerability in n/a, published on 10 Nov 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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."
Weakness: CWE-209
Which versions are affected by CVE-2023-40457?
How do I fix CVE-2023-40457?
No fix has been published for CVE-2023-40457 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2023-40457 being exploited?
There is no known exploitation of CVE-2023-40457 in the wild and no public exploit code.
Sources
Also known as GHSA-hwrr-qggh-2777.