CVE-2016-5696

medium
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

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.

References

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://securityadvisories.paloaltonetworks.com/Home/Detail/85

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://www.usenix.org/system/files/conference/usenixsecurity16/sec16_paper_cao.pdf

Details

Source: MITRE

Published: 2016-08-06

Updated: 2018-01-05

Type: CWE-200

Risk Information

CVSS v2

Base Score: 5.8

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

Impact Score: 4.9

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3

Base Score: 4.8

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

Impact Score: 2.5

Exploitability Score: 2.2

Severity: MEDIUM

Vulnerable Software

Configuration 1

OR

cpe:2.3:o:google:android:*:*:*:*:*:*:*:* versions up to 7.0 (inclusive)

Configuration 2

OR

cpe:2.3:a:oracle:vm_server:3.3:*:*:*:*:*:*:*

cpe:2.3:a:oracle:vm_server:3.4:*:*:*:*:*:*:*

Configuration 3

OR

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to 4.6.6 (inclusive)

Tenable Plugins

View all (46 total)

IDNameProductFamilySeverity
125100EulerOS Virtualization 3.0.1.0 : kernel (EulerOS-SA-2019-1494)NessusHuawei Local Security Checks
high
124983EulerOS Virtualization for ARM 64 3.0.1.0 : kernel (EulerOS-SA-2019-1530)NessusHuawei Local Security Checks
high
107065Arista Networks EOS tcp_input Challenge ACKs Shared Counter Disclosure (SA0023)NessusMisc.
medium
100419Palo Alto Networks PAN-OS 6.1.x < 6.1.17 / 7.0.x < 7.0.15 / 7.1.x < 7.1.10 / 8.0.x < 8.0.2 Multiple VulnerabilitiesNessusPalo Alto Local Security Checks
medium
99806EulerOS 2.0 SP1 : kernel (EulerOS-SA-2016-1043)NessusHuawei Local Security Checks
high
99163OracleVM 3.3 : Unbreakable / etc (OVMSA-2017-0057) (Dirty COW)NessusOracleVM Local Security Checks
critical
97205SUSE SLES12 Security Update : kernel (SUSE-SU-2017:0471-1)NessusSuSE Local Security Checks
high
97097SUSE SLES11 Security Update : kernel (SUSE-SU-2017:0437-1)NessusSuSE Local Security Checks
critical
95592openSUSE Security Update : the Linux Kernel (openSUSE-2016-1410)NessusSuSE Local Security Checks
high
95536SUSE SLES11 Security Update : kernel (SUSE-SU-2016:2976-1)NessusSuSE Local Security Checks
critical
95368SUSE SLED12 / SLES12 Security Update : kernel (SUSE-SU-2016:2912-1)NessusSuSE Local Security Checks
high
94303openSUSE Security Update : the Linux Kernel (openSUSE-2016-1227) (Dirty COW)NessusSuSE Local Security Checks
critical
93762RHEL 6 : kernel (RHSA-2016:1939)NessusRed Hat Local Security Checks
medium
93676Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2016-3617)NessusOracle Linux Local Security Checks
high
93445openSUSE Security Update : the Linux Kernel (openSUSE-2016-1076)NessusSuSE Local Security Checks
critical
93370SUSE SLES11 Security Update : kernel (SUSE-SU-2016:2245-1)NessusSuSE Local Security Checks
critical
93365RHEL 6 : kernel (RHSA-2016:1815)NessusRed Hat Local Security Checks
medium
93364RHEL 6 : kernel (RHSA-2016:1814)NessusRed Hat Local Security Checks
high
93324Debian DSA-3659-1 : linux - security updateNessusDebian Local Security Checks
medium
93321Debian DLA-609-1 : linux security updateNessusDebian Local Security Checks
high
93243Ubuntu 14.04 LTS : linux-lts-xenial vulnerabilities (USN-3070-4)NessusUbuntu Local Security Checks
high
93242Ubuntu 16.04 LTS : linux-snapdragon vulnerabilities (USN-3070-3)NessusUbuntu Local Security Checks
high
93241Ubuntu 16.04 LTS : linux-raspi2 vulnerabilities (USN-3070-2)NessusUbuntu Local Security Checks
high
93220Ubuntu 12.04 LTS : linux vulnerabilities (USN-3072-1)NessusUbuntu Local Security Checks
high
93219Ubuntu 12.04 LTS : linux-lts-trusty vulnerabilities (USN-3071-2)NessusUbuntu Local Security Checks
high
93218Ubuntu 14.04 LTS : linux vulnerabilities (USN-3071-1)NessusUbuntu Local Security Checks
high
93217Ubuntu 16.04 LTS : linux vulnerabilities (USN-3070-1)NessusUbuntu Local Security Checks
high
93136F5 Networks BIG-IP : Linux TCP stack vulnerability (K46514822)NessusF5 Networks Local Security Checks
medium
93099CentOS 6 : kernel (CESA-2016:1664)NessusCentOS Local Security Checks
medium
93096Scientific Linux Security Update : kernel on SL6.x i386/x86_64 (20160823)NessusScientific Linux Local Security Checks
medium
93095RHEL 6 : kernel (RHSA-2016:1664)NessusRed Hat Local Security Checks
medium
93094RHEL 7 : kernel (RHSA-2016:1657)NessusRed Hat Local Security Checks
high
93093Oracle Linux 6 : kernel (ELSA-2016-1664)NessusOracle Linux Local Security Checks
medium
93071Scientific Linux Security Update : kernel on SL7.x x86_64 (20160818)NessusScientific Linux Local Security Checks
medium
93052CentOS 7 : kernel (CESA-2016:1633)NessusCentOS Local Security Checks
medium
93042RHEL 7 : kernel (RHSA-2016:1633)NessusRed Hat Local Security Checks
medium
93041RHEL 7 : kernel-rt (RHSA-2016:1632)NessusRed Hat Local Security Checks
medium
93040RHEL 6 : MRG (RHSA-2016:1631)NessusRed Hat Local Security Checks
medium
93037OracleVM 3.3 : Unbreakable / etc (OVMSA-2016-0098)NessusOracleVM Local Security Checks
medium
93036OracleVM 3.4 : Unbreakable / etc (OVMSA-2016-0097)NessusOracleVM Local Security Checks
medium
93035Oracle Linux 7 : kernel (ELSA-2016-1633)NessusOracle Linux Local Security Checks
medium
92984Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2016-3595)NessusOracle Linux Local Security Checks
medium
92983Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2016-3594)NessusOracle Linux Local Security Checks
medium
92661Amazon Linux AMI : kernel (ALAS-2016-726)NessusAmazon Linux Local Security Checks
high
92446Fedora 24 : kernel (2016-9a16b2e14e)NessusFedora Local Security Checks
high
92444Fedora 23 : kernel (2016-784d5526d8)NessusFedora Local Security Checks
medium