CVE-2022-40318 Denial of service in n/a
Attackers can cause a denial of service in FRRouting's BGP daemon by sending a crafted BGP OPEN message, leading to assertion failures or out-of-bounds reads.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-40318?
CVE-2022-40318 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 3 May 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
An issue was discovered in bgpd in FRRouting (FRR) through 8.4. By crafting a BGP OPEN message with an option of type 0xff (Extended Length from RFC 9072), attackers may cause a denial of service (assertion failure and daemon restart, or out-of-bounds read). This is possible because of inconsistent boundary checks that do not account for reading 3 bytes (instead of 2) in this 0xff case. NOTE: this behavior occurs in bgp_open_option_parse in the bgp_open.c file, a different location (with a different attack vector) relative to CVE-2022-40302.
Weakness: CWE-125
Which versions are affected by CVE-2022-40318?
It affects 2 products.
Products include Debian Debian Linux, Frrouting Frrouting.
How do I fix CVE-2022-40318?
Apply the vendor's patch.
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-2022-40318 being exploited?
There is no known exploitation of CVE-2022-40318 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2022-40318, GHSA-9rqq-99cf-35g5.