runc is a CLI tool for spawning and running containers according to the OCI specification. In versions 1.2.7 and below, 1.3.0-rc.1 through 1.3.1, 1.4.0-rc.1 and 1.4.0-rc.2 files, runc would not perform sufficient verification that the source of the bind-mount (i.e., the container's /dev/null) was actually a real /dev/null inode when using the container's /dev/null to mask. This exposes two methods of attack: an arbitrary mount gadget, leading to host information disclosure, host denial of service, container escape, or a bypassing of maskedPaths. This issue is fixed in versions 1.2.8, 1.3.3 and 1.4.0-rc.3.
{
"priority_reason": "runc developers have rated this as being high severity",
"binaries": [
{
"binary_version": "1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm4",
"binary_name": "golang-github-opencontainers-runc-dev"
},
{
"binary_version": "1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm4",
"binary_name": "runc"
}
]
}