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TI-2017-08953 Aliases CVE-2017-12163GHSA-hvhw-9wrg-hf3q

Information disclosure in Samba

Priority MEDIUM 42CWE-200Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · Low · None
Fix status
Partial Red Hat: 19 fixed, 1 without a fix

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-200.

Summary

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.

Why it matters now

EPSS 0.0759 94th percentileScored 2026-11-07
Fix Partial Red Hat: 4 advisoriesRed Hat: 19 fixed, 1 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
SambaSamba4.7; 4.6.8; 4.5.14; 4.4.16—No fix listedCNA
  • Samba VendorSamba Affected 4.7; 4.6.8; 4.5.14; 4.4.16 Fixed in — No fix listed CNA

CPE configurations NVD · 12

CPEVersionsRoleVendor
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*before 4.4.16; 4.5.0 to before 4.5.14; 4.6.0 to before 4.6.8VulnerableSamba
cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:a:redhat:gluster_storage:3.0:*:*:*:*:*:*:*3.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*6.0Running onRed Hat
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*7.0Running onRed Hat
  • cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* Versions before 4.4.16; 4.5.0 to before 4.5.14; 4.6.0 to before 4.6.8 Vulnerable ·Samba
  • cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:a:redhat:gluster_storage:3.0:*:*:*:*:*:*:* Versions 3.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* Versions 6.0 Running on ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Running on ·Red Hat
Show 2 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*8.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
  • cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian

Remediation

Red Hat 4 advisories

  • RHSA-2017:2858 Released 2017-10-04 · Red Hat rating Moderate
    samba security update
    • Red Hat Gluster 3.3 Samba on RHEL-6 ctdb-4.6.3-6.el6rhs, ctdb-tests-4.6.3-6.el6rhs, libsmbclient-4.6.3-6.el6rhs +23
    • Red Hat Gluster 3.3 Samba on RHEL-7 ctdb-4.6.3-6.el7rhgs, ctdb-tests-4.6.3-6.el7rhgs, libsmbclient-4.6.3-6.el7rhgs +23
  • RHSA-2017:2789 Released 2017-09-21 · Red Hat rating Moderate
    samba security update
    • Red Hat Enterprise Linux Desktop (v. 6) libsmbclient-3.6.23-45.el6_9, samba-3.6.23-45.el6_9, samba-client-3.6.23-45.el6_9 +3
    • Red Hat Enterprise Linux Desktop Optional (v. 6) libsmbclient-devel-3.6.23-45.el6_9, samba-3.6.23-45.el6_9, samba-doc-3.6.23-45.el6_9 +5
    • Red Hat Enterprise Linux HPC Node (v. 6) samba-3.6.23-45.el6_9, samba-client-3.6.23-45.el6_9, samba-common-3.6.23-45.el6_9 +2
    • Red Hat Enterprise Linux HPC Node Optional (v. 6) libsmbclient-3.6.23-45.el6_9, libsmbclient-devel-3.6.23-45.el6_9, samba-3.6.23-45.el6_9 +6
    • Red Hat Enterprise Linux Server (v. 6) libsmbclient-3.6.23-45.el6_9, libsmbclient-3.6.23-45.el6_9.ppc, samba-3.6.23-45.el6_9 +6
    • Red Hat Enterprise Linux Server Optional (v. 6) libsmbclient-devel-3.6.23-45.el6_9, libsmbclient-devel-3.6.23-45.el6_9.ppc, samba-doc-3.6.23-45.el6_9 +6
    • Red Hat Enterprise Linux Workstation (v. 6) libsmbclient-3.6.23-45.el6_9, samba-3.6.23-45.el6_9, samba-client-3.6.23-45.el6_9 +3
    • Red Hat Enterprise Linux Workstation Optional (v. 6) libsmbclient-devel-3.6.23-45.el6_9, samba-doc-3.6.23-45.el6_9, samba-domainjoin-gui-3.6.23-45.el6_9 +4
  • RHSA-2017:2790 Released 2017-09-21 · Red Hat rating Moderate
    samba security update
    • Red Hat Enterprise Linux Client (v. 7) libsmbclient-4.6.2-11.el7_4, libwbclient-4.6.2-11.el7_4, samba-4.6.2-11.el7_4 +10
    • Red Hat Enterprise Linux Client Optional (v. 7) libsmbclient-devel-4.6.2-11.el7_4, libwbclient-devel-4.6.2-11.el7_4, samba-4.6.2-11.el7_4 +9
    • Red Hat Enterprise Linux ComputeNode (v. 7) libsmbclient-4.6.2-11.el7_4, libwbclient-4.6.2-11.el7_4, samba-4.6.2-11.el7_4 +9
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) libsmbclient-devel-4.6.2-11.el7_4, libwbclient-devel-4.6.2-11.el7_4, samba-4.6.2-11.el7_4 +10
    • Red Hat Enterprise Linux Server (v. 7) libsmbclient-4.6.2-11.el7_4, libsmbclient-4.6.2-11.el7_4.ppc, libwbclient-4.6.2-11.el7_4 +16
    • Red Hat Enterprise Linux Server Optional (v. 7) libsmbclient-devel-4.6.2-11.el7_4, libsmbclient-devel-4.6.2-11.el7_4.ppc, libwbclient-devel-4.6.2-11.el7_4 +12
    • Red Hat Enterprise Linux Server Resilient Storage (v. 7) ctdb-4.6.2-11.el7_4, ctdb-tests-4.6.2-11.el7_4
    • Red Hat Enterprise Linux Workstation (v. 7) libsmbclient-4.6.2-11.el7_4, libwbclient-4.6.2-11.el7_4, samba-4.6.2-11.el7_4 +11
    • Red Hat Enterprise Linux Workstation Optional (v. 7) libsmbclient-devel-4.6.2-11.el7_4, libwbclient-devel-4.6.2-11.el7_4, samba-dc-4.6.2-11.el7_4 +7
Show 1 more Red Hat advisories
  • RHSA-2017:2791 Released 2017-09-21 · Red Hat rating Moderate
    samba4 security update
    • Red Hat Enterprise Linux Desktop (v. 6) samba4-4.2.10-11.el6_9, samba4-client-4.2.10-11.el6_9, samba4-common-4.2.10-11.el6_9 +10
    • Red Hat Enterprise Linux HPC Node (v. 6) samba4-4.2.10-11.el6_9, samba4-client-4.2.10-11.el6_9, samba4-common-4.2.10-11.el6_9 +10
    • Red Hat Enterprise Linux Server (v. 6) samba4-4.2.10-11.el6_9, samba4-client-4.2.10-11.el6_9, samba4-common-4.2.10-11.el6_9 +10
    • Red Hat Enterprise Linux Workstation (v. 6) samba4-4.2.10-11.el6_9, samba4-client-4.2.10-11.el6_9, samba4-common-4.2.10-11.el6_9 +10

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    samba — RHSA-2017:2790

    3 records Highest priority Priority MEDIUM 2 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2017-08942 It was found that samba before 4.4.16, 4.5.x before 4.5.14, and 4.6.x before 4.6.8 did…Priority MEDIUM 47
    • TI-2017-08943 Cryptographic flaw in sambaPriority LOW 39
    Show all 3 records → Advisory →
  • Advisory ·

    samba — RHSA-2017:2858

    3 records Highest priority Priority MEDIUM 2 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2017-08942 It was found that samba before 4.4.16, 4.5.x before 4.5.14, and 4.6.x before 4.6.8 did…Priority MEDIUM 47
    • TI-2017-08943 Cryptographic flaw in sambaPriority LOW 39
    Show all 3 records → Advisory →
Show 2 more groups
  • Advisory ·

    samba — DSA-3983

    3 records Highest priority Priority MEDIUM 2 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2017-08942 It was found that samba before 4.4.16, 4.5.x before 4.5.14, and 4.6.x before 4.6.8 did…Priority MEDIUM 47
    • TI-2017-08943 Cryptographic flaw in sambaPriority LOW 39
    Show all 3 records → Advisory →
  • Advisory ·

    Samba — RHSA-2017:2791

    2 records Highest priority Priority MEDIUM 2 MEDIUM

    Other records, highest priority first

    • TI-2017-08942 It was found that samba before 4.4.16, 4.5.x before 4.5.14, and 4.6.x before 4.6.8 did…Priority MEDIUM 47
    Show all 2 records → Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 5AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2017:2790
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2017:2790
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2017:2790
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2017:2790
Red Hat Enterprise Linux Desktop (v. 6)Fixed RHSA-2017:2789, RHSA-2017:2791
Red Hat Enterprise Linux Desktop Optional (v. 6)Fixed RHSA-2017:2789
Red Hat Enterprise Linux HPC Node (v. 6)Fixed RHSA-2017:2789, RHSA-2017:2791
Red Hat Enterprise Linux HPC Node Optional (v. 6)Fixed RHSA-2017:2789
Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2017:2789, RHSA-2017:2791
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2017:2790
Red Hat Enterprise Linux Server Optional (v. 6)Fixed RHSA-2017:2789
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2017:2790
Red Hat Enterprise Linux Server Resilient Storage (v. 7)Fixed RHSA-2017:2790
Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2017:2789, RHSA-2017:2791
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2017:2790
Red Hat Enterprise Linux Workstation Optional (v. 6)Fixed RHSA-2017:2789
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2017:2790
Red Hat Gluster 3.3 Samba on RHEL-6Fixed RHSA-2017:2858
Red Hat Gluster 3.3 Samba on RHEL-7Fixed RHSA-2017:2858

Timeline

  1. 2026-10-02 Threatist record created from CVE-2017-12163
  2. 2026-10-03 Alias added: GHSA-hvhw-9wrg-hf3q

References

Patch 1

Advisory 10

  • TI-2020-01431 Netlogon Elevation of Privilege Vulnerability KEVCVSS 3.1CRITICAL 10.0
  • TI-2017-05139 Code injection in samba KEVCVSS 3.1CRITICAL 9.8
  • TI-2015-00210 The Netlogon server implementation in smbd in Samba 3.5.x and 3.6.x before 3.6.25, 4.0.x… CVSS 2.0HIGH 10.0
  • TI-2003-00081 Buffer overflow in the SMB/CIFS packet fragment re-assembly code for SMB daemon (smbd) in… CVSS 2.0HIGH 10.0
  • TI-2003-00185 Buffer overflow in the call_trans2open function in trans2.c for Samba 2.2.x before… CVSS 2.0HIGH 10.0
  • TI-2007-02362 Multiple heap-based buffer overflows in the NDR parsing in smbd in Samba 3.0.0 through… CVSS 2.0HIGH 10.0
See all 215 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences