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TI-2018-01055 Aliases CVE-2018-1139GHSA-xxm3-fp55-pm48

Improper input validation in samba

Priority MEDIUM 41CWE-20Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Information disclosure
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-522.

Summary

A flaw was found in the way samba before 4.7.9 and 4.8.4 allowed the use of weak NTLMv1 authentication even when NTLMv1 was explicitly disabled. A man-in-the-middle attacker could use this flaw to read the credential and other details passed between the samba server and client.

Why it matters now

EPSS 0.03105 87th percentileScored 2026-11-07
Fix Fixed samba (The Samba Team): 4.7.9, 4.8.4Red Hat: 3 advisories

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
Sambasambabefore 4.7.9; before 4.8.44.7.9, 4.8.4Patch availableCNA
  • samba VendorSamba Affected before 4.7.9; before 4.8.4 Fixed in 4.7.9, 4.8.4 Patch available CNA

CPE configurations NVD · 7

CPEVersionsRoleVendor
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*4.7.0 to before 4.7.9; 4.8.0 to before 4.8.4VulnerableSamba
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*14.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*16.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*18.04VulnerableCanonical
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
  • cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* Versions 4.7.0 to before 4.7.9; 4.8.0 to before 4.8.4 Vulnerable ·Samba
  • cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* Versions 14.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* Versions 16.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical
  • cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* Versions 7.0 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:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat

Remediation

  • Fix · CNA samba (The Samba Team) Fixed in 4.7.9, 4.8.4

Red Hat 3 advisories

  • RHSA-2018:3056 Released 2018-10-30 · Red Hat rating Moderate
    samba security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Client (v. 7) libsmbclient-4.8.3-4.el7, libwbclient-4.8.3-4.el7, samba-4.8.3-4.el7 +10
    • Red Hat Enterprise Linux Client Optional (v. 7) libsmbclient-devel-4.8.3-4.el7, libwbclient-devel-4.8.3-4.el7, samba-4.8.3-4.el7 +10
    • Red Hat Enterprise Linux ComputeNode (v. 7) libsmbclient-4.8.3-4.el7, libwbclient-4.8.3-4.el7, samba-4.8.3-4.el7 +9
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) libsmbclient-devel-4.8.3-4.el7, libwbclient-devel-4.8.3-4.el7, samba-4.8.3-4.el7 +11
    • Red Hat Enterprise Linux Server (v. 7) libsmbclient-4.8.3-4.el7, libsmbclient-4.8.3-4.el7.ppc, libwbclient-4.8.3-4.el7 +16
    • Red Hat Enterprise Linux Server Optional (v. 7) libsmbclient-devel-4.8.3-4.el7, libsmbclient-devel-4.8.3-4.el7.ppc, libwbclient-devel-4.8.3-4.el7 +13
    • Red Hat Enterprise Linux Server Resilient Storage (v. 7) ctdb-4.8.3-4.el7, ctdb-tests-4.8.3-4.el7
    • Red Hat Enterprise Linux Workstation (v. 7) libsmbclient-4.8.3-4.el7, libwbclient-4.8.3-4.el7, samba-4.8.3-4.el7 +11
    • Red Hat Enterprise Linux Workstation Optional (v. 7) libsmbclient-devel-4.8.3-4.el7, libwbclient-devel-4.8.3-4.el7, samba-dc-4.8.3-4.el7 +8
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) libsmbclient-4.8.3-4.el7, libwbclient-4.8.3-4.el7, samba-4.8.3-4.el7 +11
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) libsmbclient-devel-4.8.3-4.el7, libwbclient-devel-4.8.3-4.el7, samba-dc-4.8.3-4.el7 +8
  • RHSA-2018:2613 Released 2018-09-04 · Red Hat rating Moderate
    samba security, bug fix and enhancement update
    • Red Hat Gluster 3.4 Samba on RHEL-7 ctdb-4.7.5-110.el7rhgs, libsmbclient-4.7.5-110.el7rhgs, libsmbclient-devel-4.7.5-110.el7rhgs +31
  • RHSA-2018:2612 Released 2018-09-04 · Red Hat rating Moderate
    samba security, bug fix and enhancement update
    • Red Hat Gluster 3.4 Samba on RHEL-6 ctdb-4.7.5-110.el6rhs, libsmbclient-4.7.5-110.el6rhs, libsmbclient-devel-4.7.5-110.el6rhs +31

Fixed in the same release

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

  • Advisory ·

    The Samba Team samba — USN-3738-1

    4 records Highest priority Priority MEDIUM 2 MEDIUM, 2 LOW

    Other records, highest priority first

    Show all 4 records → Advisory →

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2018:3056
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2018:3056
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2018:3056
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2018:3056
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2018:3056
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2018:3056
Red Hat Enterprise Linux Server Resilient Storage (v. 7)Fixed RHSA-2018:3056
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2018:3056
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2018:3056
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)Fixed RHSA-2018:3056
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)Fixed RHSA-2018:3056
Red Hat Gluster 3.4 Samba on RHEL-6Fixed RHSA-2018:2612
Red Hat Gluster 3.4 Samba on RHEL-7Fixed RHSA-2018:2613
Not affected: 3 products
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-1139
  2. 2026-10-03 Alias added: GHSA-xxm3-fp55-pm48

References

Advisory 8

  • 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