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Vulnerability record · CVE-2016-2115 · published 25 April 2016

CVE-2016-2115: Canonical ubuntu linux vulnerability

Canonical · Ubuntu Linux

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 does not require SMB signing within a DCERPC session over ncacn_np, which allows man-in-the-middle attackers to spoof SMB clients by modifying the client-server data stream.

5.9 CVSS 3.0 Medium EPSS 10% · top 4.5% CWE-254 · CWE-254
5.9CVSS 3.0 base score, v2 4.3
10%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
74References
17 Jun 2026Last modified by NVD

Description

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 does not require SMB signing within a DCERPC session over ncacn_np, which allows man-in-the-middle attackers to spoof SMB clients by modifying the client-server data stream.

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://badlock.org/
http://lists.fedoraproject.org/pipermail/package-announce/2016-April/182185.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-April/182272.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-April/182288.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00020.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00021.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00022.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00023.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00024.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00042.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00047.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00048.html
http://rhn.redhat.com/errata/RHSA-2016-0611.html
http://rhn.redhat.com/errata/RHSA-2016-0612.html
http://rhn.redhat.com/errata/RHSA-2016-0613.html
http://rhn.redhat.com/errata/RHSA-2016-0614.html
http://rhn.redhat.com/errata/RHSA-2016-0618.html
http://rhn.redhat.com/errata/RHSA-2016-0619.html
http://rhn.redhat.com/errata/RHSA-2016-0620.html
http://rhn.redhat.com/errata/RHSA-2016-0624.html
http://www.debian.org/security/2016/dsa-3548
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
http://www.securitytracker.com/id/1035533
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.458012
http://www.ubuntu.com/usn/USN-2950-1
http://www.ubuntu.com/usn/USN-2950-2
http://www.ubuntu.com/usn/USN-2950-3
http://www.ubuntu.com/usn/USN-2950-4
http://www.ubuntu.com/usn/USN-2950-5 Third Party Advisory
https://bto.bluecoat.com/security-advisory/sa122
https://h20566.www2.hpe.com/hpsc/doc/public/display?docId=emr_na-c05087821
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05082964 Third Party Advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05162399 Third Party Advisory
https://security.gentoo.org/glsa/201612-47
https://www.samba.org/samba/history/samba-4.2.10.html
https://www.samba.org/samba/latest_news.html#4.4.2
https://www.samba.org/samba/security/CVE-2016-2115.html PatchVendor Advisory
http://badlock.org/
http://lists.fedoraproject.org/pipermail/package-announce/2016-April/182185.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-April/182272.html

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Source: NIST National Vulnerability Database (record CVE-2016-2115), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.