CVE-2017-12151
The connection could lose the requirement for signing and encrypting to any DFS redirects, allowing an attacker to read or alter the contents of the connection via a man-in-the-middle attack.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (4.10%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
A flaw was found in the way samba client before samba 4.4.16, samba 4.5.14 and samba 4.6.8 used encryption with the max protocol set as SMB3. The connection could lose the requirement for signing and encrypting to any DFS redirects, allowing an attacker to read or alter the contents of the connection via a man-in-the-middle attack.
- CVSS 3.0
- 7.4 HIGHCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- EPSS
- 4.10% probability · 91th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-300, CWE-310
- Affected
- samba/samba · debian/debian linux · redhat/enterprise linux · redhat/enterprise linux desktop · redhat/enterprise linux server aus · redhat/enterprise linux server eus · redhat/enterprise linux workstation · hp/cifs server
- Source
- secalert@redhat.com
EPSS 4.1% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.securityfocus.com/bid/100917Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1039401Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2017:2790Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2858Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-12151Issue Tracking, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20170921-0001/Third Party Advisory
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03817en_usThird Party Advisory
- https://www.debian.org/security/2017/dsa-3983Third Party Advisory
- https://www.samba.org/samba/security/CVE-2017-12151.htmlMitigation, Vendor Advisory
- http://www.securityfocus.com/bid/100917Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1039401Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2017:2790Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2858Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-12151Issue Tracking, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20170921-0001/Third Party Advisory
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03817en_usThird Party Advisory
- https://www.debian.org/security/2017/dsa-3983Third Party Advisory
- https://www.samba.org/samba/security/CVE-2017-12151.htmlMitigation, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.