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TI-2015-04451 Aliases CVE-2015-5296GHSA-pcgp-3vvv-qw57

Samba 3.x and 4.x before 4.1.22, 4.2.x before 4.2.7, and 4.3.x before 4.3.3 supports…

Priority LOW 35CWE-20Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.

Summary

Samba 3.x and 4.x before 4.1.22, 4.2.x before 4.2.7, and 4.3.x before 4.3.3 supports connections that are encrypted but unsigned, which allows man-in-the-middle attackers to conduct encrypted-to-unencrypted downgrade attacks by modifying the client-server data stream, related to clidfs.c, libsmb_server.c, and smbXcli_base.c.

Why it matters now

EPSS 0.07263 94th percentileScored 2026-11-07
Fix Partial Red Hat: 5 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
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 7

CPEVersionsRoleVendor
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*3.2.0 to before 4.1.22; 4.2.0 to before 4.2.7; 4.3.0 to before 4.3.3VulnerableSamba
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*7.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*8.0VulnerableDebian
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:*12.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*14.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:15.04:*:*:*:*:*:*:*15.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:15.10:*:*:*:*:*:*:*15.10VulnerableCanonical
  • cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* Versions 3.2.0 to before 4.1.22; 4.2.0 to before 4.2.7; 4.3.0 to before 4.3.3 Vulnerable ·Samba
  • cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
  • cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:* Versions 12.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:* Versions 14.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:15.04:*:*:*:*:*:*:* Versions 15.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:15.10:*:*:*:*:*:*:* Versions 15.10 Vulnerable ·Canonical

Remediation

Red Hat 5 advisories

  • RHSA-2016:0015 Released 2016-01-08 · Red Hat rating Moderate
    samba security update
    • Red Hat Gluster 3 Samba on RHEL-6 libsmbclient-4.1.17-16.el6rhs, libsmbclient-devel-4.1.17-16.el6rhs, libwbclient-4.1.17-16.el6rhs +18
  • RHSA-2016:0016 Released 2016-01-08 · Red Hat rating Moderate
    samba security update
    • Red Hat Gluster 3 Samba on RHEL-7 ctdb-4.2.4-9.1.el7rhgs, ctdb-devel-4.2.4-9.1.el7rhgs, ctdb-tests-4.2.4-9.1.el7rhgs +24
  • RHSA-2016:0006 Released 2016-01-08 · Red Hat rating Moderate
    samba security update
    • Red Hat Enterprise Linux Client (v. 7) libsmbclient-4.2.3-11.el7_2, libwbclient-4.2.3-11.el7_2, samba-4.2.3-11.el7_2 +9
    • Red Hat Enterprise Linux Client Optional (v. 7) libsmbclient-devel-4.2.3-11.el7_2, libwbclient-devel-4.2.3-11.el7_2, samba-4.2.3-11.el7_2 +10
    • Red Hat Enterprise Linux ComputeNode (v. 7) libsmbclient-4.2.3-11.el7_2, libwbclient-4.2.3-11.el7_2, samba-4.2.3-11.el7_2 +9
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) libsmbclient-devel-4.2.3-11.el7_2, libwbclient-devel-4.2.3-11.el7_2, samba-4.2.3-11.el7_2 +10
    • Red Hat Enterprise Linux Server (v. 7) libsmbclient-4.2.3-11.el7_2, libsmbclient-4.2.3-11.el7_2.ppc, libwbclient-4.2.3-11.el7_2 +15
    • Red Hat Enterprise Linux Server Optional (v. 7) libsmbclient-devel-4.2.3-11.el7_2, libsmbclient-devel-4.2.3-11.el7_2.ppc, libwbclient-devel-4.2.3-11.el7_2 +13
    • Red Hat Enterprise Linux Server Resilient Storage (v. 7) ctdb-4.2.3-11.el7_2, ctdb-devel-4.2.3-11.el7_2, ctdb-tests-4.2.3-11.el7_2
    • Red Hat Enterprise Linux Workstation (v. 7) libsmbclient-4.2.3-11.el7_2, libwbclient-4.2.3-11.el7_2, samba-4.2.3-11.el7_2 +10
    • Red Hat Enterprise Linux Workstation Optional (v. 7) libsmbclient-devel-4.2.3-11.el7_2, libwbclient-devel-4.2.3-11.el7_2, samba-dc-4.2.3-11.el7_2 +8
Show 2 more Red Hat advisories
  • RHSA-2016:0011 Released 2016-01-07 · Red Hat rating Moderate
    samba security update
    • Red Hat Enterprise Linux Desktop (v. 6) libsmbclient-3.6.23-24.el6_7, samba-3.6.23-24.el6_7, samba-client-3.6.23-24.el6_7 +3
    • Red Hat Enterprise Linux Desktop Optional (v. 6) libsmbclient-devel-3.6.23-24.el6_7, samba-3.6.23-24.el6_7, samba-doc-3.6.23-24.el6_7 +5
    • Red Hat Enterprise Linux HPC Node (v. 6) samba-3.6.23-24.el6_7, samba-client-3.6.23-24.el6_7, samba-common-3.6.23-24.el6_7 +2
    • Red Hat Enterprise Linux HPC Node Optional (v. 6) libsmbclient-3.6.23-24.el6_7, libsmbclient-devel-3.6.23-24.el6_7, samba-3.6.23-24.el6_7 +6
    • Red Hat Enterprise Linux Server (v. 6) libsmbclient-3.6.23-24.el6_7, libsmbclient-3.6.23-24.el6_7.ppc, samba-3.6.23-24.el6_7 +6
    • Red Hat Enterprise Linux Server Optional (v. 6) libsmbclient-devel-3.6.23-24.el6_7, libsmbclient-devel-3.6.23-24.el6_7.ppc, samba-doc-3.6.23-24.el6_7 +6
    • Red Hat Enterprise Linux Workstation (v. 6) libsmbclient-3.6.23-24.el6_7, samba-3.6.23-24.el6_7, samba-client-3.6.23-24.el6_7 +3
    • Red Hat Enterprise Linux Workstation Optional (v. 6) libsmbclient-devel-3.6.23-24.el6_7, samba-doc-3.6.23-24.el6_7, samba-domainjoin-gui-3.6.23-24.el6_7 +4
  • RHSA-2016:0010 Released 2016-01-07 · Red Hat rating Moderate
    samba4 security update
    • Red Hat Enterprise Linux Desktop (v. 6) samba4-4.0.0-67.el6_7.rc4, samba4-client-4.0.0-67.el6_7.rc4, samba4-common-4.0.0-67.el6_7.rc4 +11
    • Red Hat Enterprise Linux HPC Node (v. 6) samba4-4.0.0-67.el6_7.rc4, samba4-client-4.0.0-67.el6_7.rc4, samba4-common-4.0.0-67.el6_7.rc4 +11
    • Red Hat Enterprise Linux Server (v. 6) samba4-4.0.0-67.el6_7.rc4, samba4-client-4.0.0-67.el6_7.rc4, samba4-common-4.0.0-67.el6_7.rc4 +11
    • Red Hat Enterprise Linux Workstation (v. 6) samba4-4.0.0-67.el6_7.rc4, samba4-client-4.0.0-67.el6_7.rc4, samba4-common-4.0.0-67.el6_7.rc4 +11

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-2016:0006
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2016:0006
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2016:0006
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2016:0006
Red Hat Enterprise Linux Desktop (v. 6)Fixed RHSA-2016:0010, RHSA-2016:0011
Red Hat Enterprise Linux Desktop Optional (v. 6)Fixed RHSA-2016:0011
Red Hat Enterprise Linux HPC Node (v. 6)Fixed RHSA-2016:0010, RHSA-2016:0011
Red Hat Enterprise Linux HPC Node Optional (v. 6)Fixed RHSA-2016:0011
Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2016:0010, RHSA-2016:0011
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2016:0006
Red Hat Enterprise Linux Server Optional (v. 6)Fixed RHSA-2016:0011
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2016:0006
Red Hat Enterprise Linux Server Resilient Storage (v. 7)Fixed RHSA-2016:0006
Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2016:0010, RHSA-2016:0011
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2016:0006
Red Hat Enterprise Linux Workstation Optional (v. 6)Fixed RHSA-2016:0011
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2016:0006
Red Hat Gluster 3 Samba on RHEL-6Fixed RHSA-2016:0015
Red Hat Gluster 3 Samba on RHEL-7Fixed RHSA-2016:0016
Not affected: 1 product
  • Red Hat Enterprise Linux 5

Timeline

  1. 2026-10-02 Threatist record created from CVE-2015-5296
  2. 2026-10-03 Alias added: GHSA-pcgp-3vvv-qw57

References

Advisory 20

Other 3

Sources

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