Linux kernel: heap out-of-bounds in AF_PACKET sockets. This new issue is analogous to previously disclosed CVE-2016-8655. In both cases, a socket option that changes socket state may race with safety checks in packet_set_ring. Previously with PACKET_VERSION. This time with PACKET_RESERVE. The solution is similar: lock the socket for the update. This issue may be exploitable, we did not investigate further. As this issue affects PF_PACKET sockets, it requires CAP_NET_RAW in the process namespace. But note that with user namespaces enabled, any process can create a namespace in which it has CAP_NET_RAW.
The product writes data past the end, or before the beginning, of the intended buffer.
| Link | Tags |
|---|---|
| https://access.redhat.com/errata/RHSA-2017:3200 | third party advisory vendor advisory |
| http://www.securityfocus.com/bid/100267 | vdb entry third party advisory |
| https://access.redhat.com/errata/RHSA-2017:2918 | third party advisory vendor advisory |
| https://access.redhat.com/errata/RHSA-2017:2931 | third party advisory vendor advisory |
| http://www.debian.org/security/2017/dsa-3981 | third party advisory vendor advisory |
| https://access.redhat.com/security/cve/cve-2017-1000111 | third party advisory |
| http://www.securitytracker.com/id/1039132 | vdb entry third party advisory |
| https://access.redhat.com/errata/RHSA-2017:2930 | third party advisory vendor advisory |