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TI-2017-08943 Aliases CVE-2017-12151GHSA-xc7p-hf9j-w53w

Cryptographic flaw in samba

Priority LOW 39CWE-300Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
High · High · None
Fix status
Partial Red Hat: 11 fixed, 1 without a fix

Attack profile from CVSS 3.0 · CNA. Fix status from CNA and Red Hat.

Summary

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.

Why it matters now

EPSS 0.04104 90th percentileScored 2026-11-07
Fix Partial Red Hat: 2 advisoriesRed Hat: 11 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
Sambasamba4.4.16; 4.5.14; 4.6.8—No fix listedCNA
  • samba VendorSamba Affected 4.4.16; 4.5.14; 4.6.8 Fixed in — No fix listed CNA

CPE configurations NVD · 10

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:debian:debian_linux:8.0:*:*:*:*:*:*:*8.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:*7.4VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.4:*:*:*:*:*:*:*7.4VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:*7.5VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:a:hp:cifs_server:b.04.05.11.00:*:*:*:*:*:*:*b.04.05.11.00VulnerableHewlett Packard Enterprise
  • 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:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
  • cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 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_aus:7.4:*:*:*:*:*:*:* Versions 7.4 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_eus:7.4:*:*:*:*:*:*:* Versions 7.4 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:* Versions 7.5 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:a:hp:cifs_server:b.04.05.11.00:*:*:*:*:*:*:* Versions b.04.05.11.00 Vulnerable ·Hewlett Packard Enterprise

Remediation

Red Hat 2 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-2017:2790 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

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-2017-08953 Information disclosure in SambaPriority MEDIUM 42
    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-2017-08953 Information disclosure in SambaPriority MEDIUM 42
    Show all 3 records → Advisory →
Show 1 more group
  • 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-2017-08953 Information disclosure in SambaPriority MEDIUM 42
    Show all 3 records → Advisory →

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo 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 Server (v. 7)Fixed RHSA-2017:2790
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. 7)Fixed RHSA-2017:2790
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
Not affected: 2 products
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6

Timeline

  1. 2026-10-02 Threatist record created from CVE-2017-12151
  2. 2026-10-03 Alias added: GHSA-xc7p-hf9j-w53w

References

Advisory 7

  • 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