UBUNTU-CVE-2015-5296

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Source
https://ubuntu.com/security/CVE-2015-5296
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2015/UBUNTU-CVE-2015-5296.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2015-5296
Upstream
Downstream
Related
Published
2015-12-16T00:00:00Z
Modified
2025-09-08T16:43:25Z
Severity
  • 5.4 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N CVSS Calculator
  • 5.4 (Medium) CVSS_V3 - CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

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, libsmbserver.c, and smbXclibase.c.

References

Affected packages

Ubuntu:14.04:LTS / samba

Package

Name
samba
Purl
pkg:deb/ubuntu/samba@2:4.1.6+dfsg-1ubuntu2.14.04.11?arch=source&distro=trusty

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:4.1.6+dfsg-1ubuntu2.14.04.11

Affected versions

2:3.*

2:3.6.18-1ubuntu3

2:4.*

2:4.0.10+dfsg-4ubuntu2
2:4.0.13+dfsg-1ubuntu1
2:4.1.3+dfsg-2ubuntu2
2:4.1.3+dfsg-2ubuntu3
2:4.1.3+dfsg-2ubuntu4
2:4.1.3+dfsg-2ubuntu5
2:4.1.6+dfsg-1ubuntu1
2:4.1.6+dfsg-1ubuntu2
2:4.1.6+dfsg-1ubuntu2.14.04.1
2:4.1.6+dfsg-1ubuntu2.14.04.2
2:4.1.6+dfsg-1ubuntu2.14.04.3
2:4.1.6+dfsg-1ubuntu2.14.04.4
2:4.1.6+dfsg-1ubuntu2.14.04.5
2:4.1.6+dfsg-1ubuntu2.14.04.7
2:4.1.6+dfsg-1ubuntu2.14.04.8
2:4.1.6+dfsg-1ubuntu2.14.04.9

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libnss-winbind",
            "binary_version": "2:4.1.6+dfsg-1ubuntu2.14.04.11"
        },
        {
            "binary_name": "libpam-smbpass",
            "binary_version": "2:4.1.6+dfsg-1ubuntu2.14.04.11"
        },
        {
            "binary_name": "libpam-winbind",
            "binary_version": "2:4.1.6+dfsg-1ubuntu2.14.04.11"
        },
        {
            "binary_name": "libparse-pidl-perl",
            "binary_version": "2:4.1.6+dfsg-1ubuntu2.14.04.11"
        },
        {
            "binary_name": "libsmbclient",
            "binary_version": "2:4.1.6+dfsg-1ubuntu2.14.04.11"
        },
        {
            "binary_name": "libsmbclient-dev",
            "binary_version": "2:4.1.6+dfsg-1ubuntu2.14.04.11"
        },
        {
            "binary_name": "libsmbsharemodes-dev",
            "binary_version": "2:4.1.6+dfsg-1ubuntu2.14.04.11"
        },
        {
            "binary_name": "libsmbsharemodes0",
            "binary_version": "2:4.1.6+dfsg-1ubuntu2.14.04.11"
        },
        {
            "binary_name": "libwbclient-dev",
            "binary_version": "2:4.1.6+dfsg-1ubuntu2.14.04.11"
        },
        {
            "binary_name": "libwbclient0",
            "binary_version": "2:4.1.6+dfsg-1ubuntu2.14.04.11"
        },
        {
            "binary_name": "python-samba",
            "binary_version": "2:4.1.6+dfsg-1ubuntu2.14.04.11"
        },
        {
            "binary_name": "registry-tools",
            "binary_version": "2:4.1.6+dfsg-1ubuntu2.14.04.11"
        },
        {
            "binary_name": "samba",
            "binary_version": "2:4.1.6+dfsg-1ubuntu2.14.04.11"
        },
        {
            "binary_name": "samba-common",
            "binary_version": "2:4.1.6+dfsg-1ubuntu2.14.04.11"
        },
        {
            "binary_name": "samba-common-bin",
            "binary_version": "2:4.1.6+dfsg-1ubuntu2.14.04.11"
        },
        {
            "binary_name": "samba-dev",
            "binary_version": "2:4.1.6+dfsg-1ubuntu2.14.04.11"
        },
        {
            "binary_name": "samba-dsdb-modules",
            "binary_version": "2:4.1.6+dfsg-1ubuntu2.14.04.11"
        },
        {
            "binary_name": "samba-libs",
            "binary_version": "2:4.1.6+dfsg-1ubuntu2.14.04.11"
        },
        {
            "binary_name": "samba-testsuite",
            "binary_version": "2:4.1.6+dfsg-1ubuntu2.14.04.11"
        },
        {
            "binary_name": "samba-vfs-modules",
            "binary_version": "2:4.1.6+dfsg-1ubuntu2.14.04.11"
        },
        {
            "binary_name": "smbclient",
            "binary_version": "2:4.1.6+dfsg-1ubuntu2.14.04.11"
        },
        {
            "binary_name": "winbind",
            "binary_version": "2:4.1.6+dfsg-1ubuntu2.14.04.11"
        }
    ],
    "availability": "No subscription required"
}

Ubuntu:16.04:LTS / samba

Package

Name
samba
Purl
pkg:deb/ubuntu/samba@2:4.3.3+dfsg-1ubuntu1?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:4.3.3+dfsg-1ubuntu1

Affected versions

2:4.*

2:4.1.17+dfsg-4ubuntu2
2:4.1.20+dfsg-1ubuntu1
2:4.1.20+dfsg-1ubuntu2
2:4.1.20+dfsg-1ubuntu3
2:4.1.20+dfsg-1ubuntu5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "ctdb",
            "binary_version": "2:4.3.3+dfsg-1ubuntu1"
        },
        {
            "binary_name": "libnss-winbind",
            "binary_version": "2:4.3.3+dfsg-1ubuntu1"
        },
        {
            "binary_name": "libpam-winbind",
            "binary_version": "2:4.3.3+dfsg-1ubuntu1"
        },
        {
            "binary_name": "libparse-pidl-perl",
            "binary_version": "2:4.3.3+dfsg-1ubuntu1"
        },
        {
            "binary_name": "libsmbclient",
            "binary_version": "2:4.3.3+dfsg-1ubuntu1"
        },
        {
            "binary_name": "libsmbclient-dev",
            "binary_version": "2:4.3.3+dfsg-1ubuntu1"
        },
        {
            "binary_name": "libwbclient-dev",
            "binary_version": "2:4.3.3+dfsg-1ubuntu1"
        },
        {
            "binary_name": "libwbclient0",
            "binary_version": "2:4.3.3+dfsg-1ubuntu1"
        },
        {
            "binary_name": "python-samba",
            "binary_version": "2:4.3.3+dfsg-1ubuntu1"
        },
        {
            "binary_name": "registry-tools",
            "binary_version": "2:4.3.3+dfsg-1ubuntu1"
        },
        {
            "binary_name": "samba",
            "binary_version": "2:4.3.3+dfsg-1ubuntu1"
        },
        {
            "binary_name": "samba-common",
            "binary_version": "2:4.3.3+dfsg-1ubuntu1"
        },
        {
            "binary_name": "samba-common-bin",
            "binary_version": "2:4.3.3+dfsg-1ubuntu1"
        },
        {
            "binary_name": "samba-dev",
            "binary_version": "2:4.3.3+dfsg-1ubuntu1"
        },
        {
            "binary_name": "samba-dsdb-modules",
            "binary_version": "2:4.3.3+dfsg-1ubuntu1"
        },
        {
            "binary_name": "samba-libs",
            "binary_version": "2:4.3.3+dfsg-1ubuntu1"
        },
        {
            "binary_name": "samba-testsuite",
            "binary_version": "2:4.3.3+dfsg-1ubuntu1"
        },
        {
            "binary_name": "samba-vfs-modules",
            "binary_version": "2:4.3.3+dfsg-1ubuntu1"
        },
        {
            "binary_name": "smbclient",
            "binary_version": "2:4.3.3+dfsg-1ubuntu1"
        },
        {
            "binary_name": "winbind",
            "binary_version": "2:4.3.3+dfsg-1ubuntu1"
        }
    ],
    "availability": "No subscription required"
}