CVE-2016-5696 Information

Description

net/ipv4/tcp_input.c in the Linux kernel before 4.7 does not properly determine the rate of challenge ACK segments which makes it easier for remote attackers to hijack TCP sessions via a blind in-window attack.

CVSS Vector

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

Reference

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=75ff39ccc1bd5d3c455b6822ab09e533c551f758 http://rhn.redhat.com/errata/RHSA-2016-1631.html http://rhn.redhat.com/errata/RHSA-2016-1632.html http://rhn.redhat.com/errata/RHSA-2016-1633.html http://rhn.redhat.com/errata/RHSA-2016-1657.html http://rhn.redhat.com/errata/RHSA-2016-1664.html http://rhn.redhat.com/errata/RHSA-2016-1814.html http://rhn.redhat.com/errata/RHSA-2016-1815.html http://rhn.redhat.com/errata/RHSA-2016-1939.html http://source.android.com/security/bulletin/2016-10-01.html http://www.openwall.com/lists/oss-security/2016/07/12/2 http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html http://www.prnewswire.com/news-releases/mitnick-attack-reappears-at-geekpwn-macau-contest-300270779.html http://www.securityfocus.com/bid/91704 http://www.securitytracker.com/id/1036625 http://www.ubuntu.com/usn/USN-3070-1 http://www.ubuntu.com/usn/USN-3070-2 http://www.ubuntu.com/usn/USN-3070-3 http://www.ubuntu.com/usn/USN-3070-4 http://www.ubuntu.com/usn/USN-3071-1 http://www.ubuntu.com/usn/USN-3071-2 http://www.ubuntu.com/usn/USN-3072-1 http://www.ubuntu.com/usn/USN-3072-2 https://bto.bluecoat.com/security-advisory/sa131 https://bugzilla.redhat.com/show_bug.cgi?id=1354708 https://github.com/Gnoxter/mountain_goat https://github.com/torvalds/linux/commit/75ff39ccc1bd5d3c455b6822ab09e533c551f758 https://kc.mcafee.com/corporate/index?page=content&id=SB10167 https://security.paloaltonetworks.com/CVE-2016-5696 https://www.usenix.org/system/files/conference/usenixsecurity16/sec16_paper_cao.pdf

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

LOW

Base Score

LOW

Base Severity

4.8