CVE-2016-2110

Description

The NTLMSSP authentication implementation in Samba 3.x and 4.x before 4.2.11, 4.3.x before 4.3.8, and 4.4.x before 4.4.2 allows man-in-the-middle attackers to perform protocol-downgrade attacks by modifying the client-server data stream to remove application-layer flags or encryption settings, as demonstrated by clearing the NTLMSSP_NEGOTIATE_SEAL or NTLMSSP_NEGOTIATE_SIGN option to disrupt LDAP security.

Category

5.9
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 4.69% Top 15%
Vendor Advisory slackware.com Vendor Advisory opensuse.org Vendor Advisory redhat.com Vendor Advisory opensuse.org Vendor Advisory ubuntu.com Vendor Advisory opensuse.org Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory opensuse.org Vendor Advisory ubuntu.com Vendor Advisory fedoraproject.org Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory fedoraproject.org Vendor Advisory opensuse.org Vendor Advisory redhat.com Vendor Advisory opensuse.org Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory opensuse.org Vendor Advisory ubuntu.com Vendor Advisory fedoraproject.org Vendor Advisory opensuse.org Vendor Advisory redhat.com Vendor Advisory gentoo.org Vendor Advisory debian.org Vendor Advisory redhat.com Vendor Advisory ubuntu.com Vendor Advisory redhat.com Vendor Advisory ubuntu.com Vendor Advisory samba.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.458012 vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00020.html vendor advisory
http://rhn.redhat.com/errata/RHSA-2016-0612.html vendor advisory
http://lists.opensuse.org/opensuse-updates/2016-05/msg00124.html vendor advisory
http://www.ubuntu.com/usn/USN-2950-1 vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00024.html vendor advisory
http://rhn.redhat.com/errata/RHSA-2016-0613.html vendor advisory
http://badlock.org/
http://rhn.redhat.com/errata/RHSA-2016-0621.html vendor advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00042.html vendor advisory
http://www.ubuntu.com/usn/USN-2950-5 vendor advisory
https://www.samba.org/samba/history/samba-4.2.10.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-April/182185.html vendor advisory
http://rhn.redhat.com/errata/RHSA-2016-0624.html vendor advisory
http://rhn.redhat.com/errata/RHSA-2016-0618.html vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00022.html vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00021.html vendor advisory
https://www.samba.org/samba/latest_news.html#4.4.2
http://www.securitytracker.com/id/1035533 vdb entry
http://lists.fedoraproject.org/pipermail/package-announce/2016-April/182272.html vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00046.html vendor advisory
http://rhn.redhat.com/errata/RHSA-2016-0614.html vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00023.html vendor advisory
http://rhn.redhat.com/errata/RHSA-2016-0620.html vendor advisory
http://rhn.redhat.com/errata/RHSA-2016-0611.html vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00047.html vendor advisory
https://bto.bluecoat.com/security-advisory/sa122
http://www.ubuntu.com/usn/USN-2950-3 vendor advisory
http://lists.fedoraproject.org/pipermail/package-announce/2016-April/182288.html vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00048.html vendor advisory
https://www.samba.org/samba/security/CVE-2016-2110.html patch vendor advisory
http://rhn.redhat.com/errata/RHSA-2016-0619.html vendor advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05082964
https://h20566.www2.hpe.com/hpsc/doc/public/display?docId=emr_na-c05087821
https://security.gentoo.org/glsa/201612-47 vendor advisory
http://www.debian.org/security/2016/dsa-3548 vendor advisory
http://rhn.redhat.com/errata/RHSA-2016-0623.html vendor advisory
http://www.ubuntu.com/usn/USN-2950-2 vendor advisory
http://rhn.redhat.com/errata/RHSA-2016-0625.html vendor advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05162399
http://www.ubuntu.com/usn/USN-2950-4 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2016-2110?
CVE-2016-2110 has been scored as a medium severity vulnerability.
How to fix CVE-2016-2110?
To fix CVE-2016-2110, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2016-2110 being actively exploited in the wild?
It is possible that CVE-2016-2110 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~5% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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