CVE-2016-8655 Information

Description

Race condition in net/packet/af_packet.c in the Linux kernel through 4.8.12 allows local users to gain privileges or cause a denial of service (use-after-free) by leveraging the CAP_NET_RAW capability to change a socket version related to the packet_set_ring and packet_setsockopt functions.

CVSS Vector

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

Reference

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=84ac7260236a49c79eede91617700174c2c19b0c http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00044.html http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00054.html http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00055.html http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00056.html http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00067.html http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00070.html http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00073.html http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00076.html http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00077.html http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00087.html http://packetstormsecurity.com/files/140063/Linux-Kernel-4.4.0-AF_PACKET-Race-Condition-Privilege-Escalation.html http://rhn.redhat.com/errata/RHSA-2017-0386.html http://rhn.redhat.com/errata/RHSA-2017-0387.html http://rhn.redhat.com/errata/RHSA-2017-0402.html http://www.openwall.com/lists/oss-security/2016/12/06/1 http://www.securityfocus.com/bid/94692 http://www.securitytracker.com/id/1037403 http://www.securitytracker.com/id/1037968 http://www.ubuntu.com/usn/USN-3149-1 http://www.ubuntu.com/usn/USN-3149-2 http://www.ubuntu.com/usn/USN-3150-1 http://www.ubuntu.com/usn/USN-3150-2 http://www.ubuntu.com/usn/USN-3151-1 http://www.ubuntu.com/usn/USN-3151-2 http://www.ubuntu.com/usn/USN-3151-3 http://www.ubuntu.com/usn/USN-3151-4 http://www.ubuntu.com/usn/USN-3152-1 http://www.ubuntu.com/usn/USN-3152-2 https://bugzilla.redhat.com/show_bug.cgi?id=1400019 https://github.com/torvalds/linux/commit/84ac7260236a49c79eede91617700174c2c19b0c https://source.android.com/security/bulletin/2017-03-01.html https://www.exploit-db.com/exploits/40871/ https://www.exploit-db.com/exploits/44696/

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8