medium 4.1

CVE-2017-12163 json

An information leak flaw was found in the way SMB1 protocol was implemented by Samba before 4.4.16, 4.5.x before 4.5.14, and 4.6.x before 4…

published 2018-07-26 8 y ago modified 2026-06-17 4 mo ago also EUVD-2017-3740

cvss: 4.1; version 3.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 7.6%; EPSS 7.6% chance of exploitation in 30 days, percentile 94%
public exploits: 0; none known

An information leak flaw was found in the way SMB1 protocol was implemented by Samba before 4.4.16, 4.5.x before 4.5.14, and 4.6.x before 4.6.8. A malicious client could use this flaw to dump server memory contents to a file on the samba share or to a shared printer, though the exact area of server memory cannot be controlled by the attacker.

Patch / fix

fixed in 1 distros 6 links 1

samba samba 4.4.16, 4.5.14, 4.6.8

debian ubuntu red hat suse opensuse alpine

samba Debian 14, Debian 13, Debian 12 2:4.6.7+dfsg-2

debian advisories DEBIAN-CVE-2017-12163

samba Ubuntu 14.04 LTS 2:4.3.11+dfsg-0ubuntu0.14.04.12
samba Ubuntu 16.04 LTS 2:4.3.11+dfsg-0ubuntu0.16.04.11

ubuntu advisories UBUNTU-CVE-2017-12163

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

samba storage 3.3 4.6.3-6.el6rhs
samba storage 3.3 4.6.3-6.el7rhgs
ctdb storage 3.3 4.6.3-6.el6rhs
ctdb storage 3.3 4.6.3-6.el7rhgs
samba-dc storage 3.3 4.6.3-6.el6rhs
samba-dc storage 3.3 4.6.3-6.el7rhgs
ctdb-tests storage 3.3 4.6.3-6.el6rhs
ctdb-tests storage 3.3 4.6.3-6.el7rhgs

red hat advisories RHSA-2017:2858 RHSA-2017:2791 RHSA-2017:2789 RHSA-2017:2790

samba SLES for SAP 12 SP3, SLES 12 SP3, SLED 12 SP3 +3 more 4.6.9+git.59.c2cff9cea4c-3.17.1
samba SLES for SAP 12 SP2, SLES for SAP 12 SP1, SLES for Raspberry Pi 12 SP2 +5 more 4.2.4-28.21.1
samba SLES for SAP 12 SP1, SLES 12 SP1-LTSS, OpenStack Cloud 6 4.2.4-28.19.3
samba SLES for SAP 11 SP4, SLES 11 SP4, SLES 11 SP3-TERADATA +3 more 3.6.3-94.5.1
samba SLES 12-LTSS, SLE High Availability Extension 12 4.2.4-18.44.2
samba SLES for SAP 12 SP3, SLES 12 SP3, SLED 12 SP3 +2 more 4.6.7+git.51.327af8d0a11-3.12.1
samba SLES for SAP 12 SP2, SLES for Raspberry Pi 12 SP2, SLES 12 SP2 +3 more 4.4.2-38.11.2

suse advisories SUSE-SU-2017:3155-1 SUSE-SU-2017:2971-1 SUSE-SU-2017:2726-1 SUSE-SU-2017:2715-1 SUSE-SU-2017:2704-1 SUSE-SU-2017:2695-1

samba openSUSE Tumbleweed 4.14.6+git.182.2205d5224e3-1.1

opensuse advisories openSUSE-SU-2024:11365-1

samba Alpine 3.24, Alpine 3.23, Alpine 3.22 +15 more 4.7.0-r0
samba Alpine 3.4 4.4.16-r0
samba Alpine 3.5 4.5.14-r0
samba Alpine 3.6 4.6.8-r0

alpine advisories ALPINE-CVE-2017-12163

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

samba.org/samba/security/CVE-2017-12163.html advisory

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-12163 updated 2026-11-05 cvss 4.1

Samba: Server memory information leak over SMB1

Red Hat Enterprise Linux 5 samba
affected: workaround, no fix planned “Will not fix”
Red Hat Enterprise Linux Client (v. 7) samba 4.6.2-11.el7_4, samba-libs 4.6.2-11.el7_4, libwbclient 4.6.2-11.el7_4, libsmbclient 4.6.2-11.el7_4, samba-client 4.6.2-11.el7_4, samba-common 4.6.2-11.el7_4, +7 more Red Hat Enterprise Linux Client Optional (v. 7) samba 4.6.2-11.el7_4, samba-dc 4.6.2-11.el7_4, samba-pidl 4.6.2-11.el7_4, samba-test 4.6.2-11.el7_4, samba-python 4.6.2-11.el7_4, samba-dc-libs 4.6.2-11.el7_4, +3 more Red Hat Enterprise Linux ComputeNode (v. 7) samba 4.6.2-11.el7_4, samba-libs 4.6.2-11.el7_4, libwbclient 4.6.2-11.el7_4, libsmbclient 4.6.2-11.el7_4, samba-client 4.6.2-11.el7_4, samba-common 4.6.2-11.el7_4, +6 more Red Hat Enterprise Linux ComputeNode Optional (v. 7) samba 4.6.2-11.el7_4, samba-dc 4.6.2-11.el7_4, samba-pidl 4.6.2-11.el7_4, samba-test 4.6.2-11.el7_4, samba-python 4.6.2-11.el7_4, samba-dc-libs 4.6.2-11.el7_4, +4 more
fixed: vendor fix RHSA-2017:2790
Red Hat Enterprise Linux Desktop (v. 6) samba 3.6.23-45.el6_9, samba4 4.2.10-11.el6_9, samba4-dc 4.2.10-11.el6_9, samba4-libs 4.2.10-11.el6_9, samba4-pidl 4.2.10-11.el6_9, samba4-test 4.2.10-11.el6_9, +12 more Red Hat Enterprise Linux Desktop Optional (v. 6) samba 3.6.23-45.el6_9, samba-swat 3.6.23-45.el6_9, samba-glusterfs 3.6.23-45.el6_9, samba-domainjoin-gui 3.6.23-45.el6_9, samba-winbind-krb5-locator 3.6.23-45.el6_9 Red Hat Enterprise Linux HPC Node (v. 6) samba 3.6.23-45.el6_9, samba4 4.2.10-11.el6_9, samba4-dc 4.2.10-11.el6_9, samba4-libs 4.2.10-11.el6_9, samba4-pidl 4.2.10-11.el6_9, samba4-test 4.2.10-11.el6_9, +11 more Red Hat Enterprise Linux HPC Node Optional (v. 6) samba 3.6.23-45.el6_9, samba-swat 3.6.23-45.el6_9, libsmbclient 3.6.23-45.el6_9, samba-glusterfs 3.6.23-45.el6_9, samba-domainjoin-gui 3.6.23-45.el6_9, samba-winbind-krb5-locator 3.6.23-45.el6_9 Red Hat Enterprise Linux Server (v. 6) samba 3.6.23-45.el6_9, samba4 4.2.10-11.el6_9, samba4-dc 4.2.10-11.el6_9, samba4-libs 4.2.10-11.el6_9, samba4-pidl 4.2.10-11.el6_9, samba4-test 4.2.10-11.el6_9, +12 more
fixed: vendor fix RHSA-2017:2789
Red Hat Enterprise Linux Server (v. 7) samba 4.6.2-11.el7_4, samba-libs 4.6.2-11.el7_4, libwbclient 4.6.2-11.el7_4, libsmbclient 4.6.2-11.el7_4, samba-client 4.6.2-11.el7_4, samba-common 4.6.2-11.el7_4, +8 more
fixed: vendor fix RHSA-2017:2790
Red Hat Enterprise Linux Server Optional (v. 6) samba-swat 3.6.23-45.el6_9, samba-glusterfs 3.6.23-45.el6_9, samba-domainjoin-gui 3.6.23-45.el6_9, samba-winbind-krb5-locator 3.6.23-45.el6_9
fixed: vendor fix RHSA-2017:2789
Red Hat Enterprise Linux Server Optional (v. 7) samba-dc 4.6.2-11.el7_4, samba-pidl 4.6.2-11.el7_4, samba-test 4.6.2-11.el7_4, samba-python 4.6.2-11.el7_4, samba-dc-libs 4.6.2-11.el7_4, samba-test-libs 4.6.2-11.el7_4, +2 more Red Hat Enterprise Linux Server Resilient Storage (v. 7) ctdb 4.6.2-11.el7_4, ctdb-tests 4.6.2-11.el7_4
fixed: vendor fix RHSA-2017:2790
Red Hat Enterprise Linux Workstation (v. 6) samba 3.6.23-45.el6_9, samba4 4.2.10-11.el6_9, samba4-dc 4.2.10-11.el6_9, samba4-libs 4.2.10-11.el6_9, samba4-pidl 4.2.10-11.el6_9, samba4-test 4.2.10-11.el6_9, +12 more
fixed: vendor fix RHSA-2017:2789
Red Hat Enterprise Linux Workstation (v. 7) samba 4.6.2-11.el7_4, samba-libs 4.6.2-11.el7_4, libwbclient 4.6.2-11.el7_4, libsmbclient 4.6.2-11.el7_4, samba-client 4.6.2-11.el7_4, samba-common 4.6.2-11.el7_4, +8 more
fixed: vendor fix RHSA-2017:2790

show 3 more

Red Hat Enterprise Linux Workstation Optional (v. 6) samba-swat 3.6.23-45.el6_9, samba-glusterfs 3.6.23-45.el6_9, samba-domainjoin-gui 3.6.23-45.el6_9, samba-winbind-krb5-locator 3.6.23-45.el6_9
fixed: vendor fix RHSA-2017:2789
Red Hat Enterprise Linux Workstation Optional (v. 7) samba-dc 4.6.2-11.el7_4, samba-pidl 4.6.2-11.el7_4, samba-test 4.6.2-11.el7_4, samba-dc-libs 4.6.2-11.el7_4, samba-test-libs 4.6.2-11.el7_4, samba-vfs-glusterfs 4.6.2-11.el7_4, +1 more
fixed: vendor fix RHSA-2017:2790
Red Hat Gluster 3.3 Samba on RHEL-6 ctdb 4.6.3-6.el6rhs, samba 4.6.3-6.el6rhs, samba-dc 4.6.3-6.el6rhs, ctdb-tests 4.6.3-6.el6rhs, samba-libs 4.6.3-6.el6rhs, samba-pidl 4.6.3-6.el6rhs, +17 more Red Hat Gluster 3.3 Samba on RHEL-7 ctdb 4.6.3-6.el7rhgs, samba 4.6.3-6.el7rhgs, samba-dc 4.6.3-6.el7rhgs, ctdb-tests 4.6.3-6.el7rhgs, samba-libs 4.6.3-6.el7rhgs, samba-pidl 4.6.3-6.el7rhgs, +17 more
fixed: vendor fix RHSA-2017:2858

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

7.59% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.0	4.1	CVSS:3.0/AV:A/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
NVD	3.0	7.1	CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
NVD	2.0	4.8	AV:A/AC:L/Au:N/C:P/I:P/A:N

Affected products

Samba Samba

Classification

Weakness

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

References

samba.org /samba/security/CVE-2017-12163.html
patch, vendor-advisory
access.redhat.com /errata/RHSA-2017:2790
vendor-advisory, third-party-advisory
debian.org /security/2017/dsa-3983
vendor-advisory, third-party-advisory
access.redhat.com /errata/RHSA-2017:2858
vendor-advisory, third-party-advisory
access.redhat.com /errata/RHSA-2017:2789
vendor-advisory, third-party-advisory
access.redhat.com /errata/RHSA-2017:2791
vendor-advisory, third-party-advisory
h20566.www2.hpe.com /hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbns03775en_us
third-party-advisory
security.netapp.com /advisory/ntap-20170921-0001/
third-party-advisory
securityfocus.com /bid/100925
vdb-entry, third-party-advisory
synology.com /support/security/Synology_SA_17_57_Samba
mitigation, third-party-advisory
support.hpe.com /hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03817en_us
third-party-advisory
securitytracker.com /id/1039401
vdb-entry, third-party-advisory
bugzilla.redhat.com /show_bug.cgi?id=CVE-2017-12163
issue-tracking, mitigation, third-party-advisory

Sources

CVE List CVE-2017-12163
NVD CVE-2017-12163

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary