In Firecracker 0.20.x before 0.20.1 and 0.21.x before 0.21.2, the network stack can freeze under heavy ingress traffic. This can result in a denial of service on the microVM when it is configured with a single network interface, and an availability problem for the microVM network interface on which the issue is triggered.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-16843
Reference (s):
- https://www.openwall.com/lists/oss-security/2020/08/13/1
- https://github.com/firecracker-microvm/firecracker/issues/2057
- URL: https://github.com/firecracker-microvm/firecracker/issues/2057
- MLIST:[oss-security] 20200813 CVE-2020-16843: Firecracker v0.20.0, v0.21.0 and v0.21.1 network stack can freeze under heavy ingress traffic
- URL: http://www.openwall.com/lists/oss-security/2020/08/13/1