CVE-2017-1000111 Information

Description

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.

Vulnerability Type (CWE)

CWE-787

Published

2017-10-05

Last Modified

2020-10-15

CVSS Vector

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Base Score

7.8 HIGH

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

References

http://www.debian.org/security/2017/dsa-3981 (Third Party Advisory) http://www.securityfocus.com/bid/100267 (Third Party Advisory,VDB Entry) http://www.securitytracker.com/id/1039132 (Third Party Advisory,VDB Entry) https://access.redhat.com/errata/RHSA-2017:2918 (Third Party Advisory) https://access.redhat.com/errata/RHSA-2017:2930 (Third Party Advisory) https://access.redhat.com/errata/RHSA-2017:2931 (Third Party Advisory) https://access.redhat.com/errata/RHSA-2017:3200 (Third Party Advisory) https://access.redhat.com/security/cve/cve-2017-1000111 (Third Party Advisory)