Vulnerability Summary for CVE-2016-5696

Vulnerability Summary for CVE-2016-5696

Original release date: 08/06/2016

Last revised: 08/10/2016

Source: US-CERT/NIST

Overview

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 man-in-the-middle attackers to hijack TCP sessions via a blind in-window attack.

Impact

CVSS Severity (version 3.0):

CVSS v3 Base Score: 5.9 Medium

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

Impact Score: 3.6

Exploitability Score: 2.2

CVSS Version 3 Metrics:

Attack Vector (AV): Network

Attack Complexity (AC): High

Privileges Required (PR): None

User Interaction (UI): None

Scope (S): Unchanged

Confidentiality (C): High

Integrity (I): None

Availability (A): None

CVSS Severity (version 2.0):

CVSS v2 Base Score: 4.3 MEDIUM

Vector: (AV:N/AC:M/Au:N/C:P/I:N/A:N) (legend)

Impact Subscore: 2.9

Exploitability Subscore: 8.6

CVSS Version 2 Metrics:

Access Vector: Network exploitable

Access Complexity: Medium

Authentication: Not required to exploit

Impact Type: Allows unauthorized disclosure of information

References to Advisories, Solutions, and Tools

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External Source: MISC

Name: http://www.prnewswire.com/news-releases/mitnick-attack-reappears-at-geekpwn-macau-contest-300270779.html

Type: Technical Description

Hyperlink: http://www.prnewswire.com/news-releases/mitnick-attack-reappears-at-geekpwn-macau-contest-300270779.html

External Source: MLIST

Name: [oss-security] 20160712 Re: CVE-2016-5389: linux kernel - challange ack information leak.

Type: Mailing List; Third Party Advisory

Hyperlink: http://www.openwall.com/lists/oss-security/2016/07/12/2

External Source: CONFIRM

Name: https://bugzilla.redhat.com/show_bug.cgi?id=1354708

Type: Issue Tracking

Hyperlink: https://bugzilla.redhat.com/show_bug.cgi?id=1354708

External Source: CONFIRM

Name: http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=75ff39ccc1bd5d3c455b6822ab09e533c551f758

Type: Issue Tracking; Patch

Hyperlink: http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=75ff39ccc1bd5d3c455b6822ab09e533c551f758

External Source: CONFIRM

Name: https://github.com/torvalds/linux/commit/75ff39ccc1bd5d3c455b6822ab09e533c551f758

Type: Issue Tracking; Patch

Hyperlink: https://github.com/torvalds/linux/commit/75ff39ccc1bd5d3c455b6822ab09e533c551f758

Vulnerable software and versions

+ Configuration 1
* OR
* cpe:/o:linux:linux_kernel:4.6.6 and previous versions

* Denotes Vulnerable Software
Changes related to vulnerability configurations

Technical Details

Vulnerability Type (View All)

• Information Leak / Disclosure (CWE-200)

CVE Standard Vulnerability Entry http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-5696

- wong chee tat :)