Samba 3.x and 4.x before 4.1.22, 4.2.x before 4.2.7, and...
Vulnerability Description
Samba 3.x and 4.x before 4.1.22, 4.2.x before 4.2.7, and 4.3.x before 4.3.3 supports connections that are encrypted but unsigned, which allows man-in-the-middle attackers to conduct encrypted-to-unencrypted downgrade attacks by modifying the client-server data stream, related to clidfs.c, libsmb_server.c, and smbXcli_base.c.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
Am I Vulnerable?
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Credits & Attribution
No credits recorded in the NVD database.
References
- https://git.samba.org/?p=samba.git%3Ba=commit%3Bh=a819d2b440aafa3138d95ff6e8b824da885a70e9
- http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174391.html
- https://git.samba.org/?p=samba.git%3Ba=commit%3Bh=1ba49b8f389eda3414b14410c7fbcb4041ca06b1
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00042.html
- http://www.ubuntu.com/usn/USN-2855-2
- http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00002.html
- http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00019.html
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
- http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00020.html
- http://www.securityfocus.com/bid/79732
- http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00017.html
- http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00032.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174076.html
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00047.html
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05115993
- https://git.samba.org/?p=samba.git%3Ba=commit%3Bh=d724f835acb9f4886c0001af32cd325dbbf1f895
- http://www.securitytracker.com/id/1034493
- http://www.debian.org/security/2016/dsa-3433
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00048.html
- http://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html
- https://security.gentoo.org/glsa/201612-47
- https://bugzilla.redhat.com/show_bug.cgi?id=1290292
- https://www.samba.org/samba/security/CVE-2015-5296.html
- http://www.ubuntu.com/usn/USN-2855-1
- http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00033.html
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Timeline
CVSS Vectors
Weaknesses (CWE)
No CWE data available
MITRE ATT&CK TTPs
No associated TTPs found for this vulnerability.