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CVE-2017-12151

27
FAUCET Score

CVE-2017-12151 describes a flaw in Samba client versions prior to 4.4.16, 4.5.14, and 4.6.8, specifically when using SMB3 with DFS redirects. This vulnerability allows a man-in-the-middle attacker to bypass encryption and signing requirements, enabling them to read or alter sensitive data. Rated 7.4 HIGH, it presents a significant risk due to its network-based attack vector and high impact on confidentiality and integrity, despite requiring high attack complexity. There is no evidence of active exploitation, public exploit code, or significant community discussion, suggesting it is not widely targeted.

Impacted Technologies

VendorProductVersion(s)CPE
< 4.4.16CPE matchmatch criteria
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
>= 4.5.0, < 4.5.14CPE matchmatch criteria
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
>= 4.6.0, < 4.6.8CPE matchmatch criteria
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.4HIGH

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
5.2
CvssVersion
3.0

Exploit Intelligence

EPSS Score
4.59%
Probability of exploitation in next 30 days
EPSS Percentile
90.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0459 is in the 56th percentile among its peer group of 8,914 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: samba-0:4.6.2-11.el7_4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Gluster Storage 3.3 for RHEL 6Fixed in: samba-0:4.6.3-6.el6rhs
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Gluster Storage 3.3 for RHEL 7Fixed in: samba-0:4.6.3-6.el7rhgs
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: samba4

Vendor Advisories (1)

redhatCVE-2017-12151Moderate

samba: SMB2 connections don't keep encryption across DFS redirects

Sep 20, 2017

References

access.redhat.com / errata/RHSA-2017:2790
Third Party Advisory
access.redhat.com / errata/RHSA-2017:2858
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory
security.netapp.com / advisory/ntap-20170921-0001
Third Party Advisory
support.hpe.com / hpsc/doc/public/display
Third Party Advisory
debian.org / security/2017/dsa-3983
Third Party Advisory
samba.org / samba/security/CVE-2017-12151.html
MitigationVendor Advisory
securityfocus.com / bid/100917
Third Party AdvisoryVDB Entry
securitytracker.com / id/1039401
Third Party AdvisoryVDB Entry