Flawed bounds checking in the copy_data function leads to a buffer overflow. An attacker in a virtual machine can leverage the buffer overflow to write arbitrary data to any address in the vhost_crypto application. The vulnerability can be used to gain code execution in the vhost_crypto process. This vulnerability is a complete compromise of the virtual machine host-guest isolation.
Statement: This flaw does not affect the versions of `dpdk` as shipped with Red Hat Enterprise Linux 7 and 8 or the versions embedded in Red Hat Virtualization or the Fast Datapath `openvswitch` package, as they do not enable generic crypto device library support. This causes the vulnerable code in vhost_crypto.c to not be included. This flaw does not affect Red Hat Ceph Storage 3 and 4 as dpdk (embedded in ceph source rpm) is not built in the packages, therefore the vulnerable code is not available in the resulting RPM and the issue cannot be exploited.
Acknowledgments: Name: Ryan Hall
External References: https://www.openwall.com/lists/oss-security/2020/09/28/3
Created dpdk tracking bugs for this issue: Affects: fedora-all [bug 1883273]
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s): https://access.redhat.com/security/cve/cve-2020-14374