UBUNTU-CVE-2021-23192

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Source
https://ubuntu.com/security/CVE-2021-23192
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-23192.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-23192
Upstream
Downstream
Related
Published
2021-11-09T00:00:00Z
Modified
2025-09-08T16:46:59Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A flaw was found in the way samba implemented DCE/RPC. If a client to a Samba server sent a very large DCE/RPC request, and chose to fragment it, an attacker could replace later fragments with their own data, bypassing the signature requirements.

References

Affected packages

Ubuntu:20.04:LTS / samba

Package

Name
samba
Purl
pkg:deb/ubuntu/samba@2:4.13.14+dfsg-0ubuntu0.20.04.1?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:4.13.14+dfsg-0ubuntu0.20.04.1

Affected versions

2:4.*

2:4.10.7+dfsg-0ubuntu2
2:4.10.7+dfsg-0ubuntu3
2:4.11.1+dfsg-3ubuntu1
2:4.11.1+dfsg-3ubuntu2
2:4.11.1+dfsg-3ubuntu4
2:4.11.5+dfsg-1ubuntu1
2:4.11.5+dfsg-1ubuntu2
2:4.11.6+dfsg-0ubuntu1
2:4.11.6+dfsg-0ubuntu1.1
2:4.11.6+dfsg-0ubuntu1.2
2:4.11.6+dfsg-0ubuntu1.3
2:4.11.6+dfsg-0ubuntu1.4
2:4.11.6+dfsg-0ubuntu1.5
2:4.11.6+dfsg-0ubuntu1.6
2:4.11.6+dfsg-0ubuntu1.8
2:4.11.6+dfsg-0ubuntu1.9
2:4.11.6+dfsg-0ubuntu1.10

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "2:4.13.14+dfsg-0ubuntu0.20.04.1",
            "binary_name": "ctdb"
        },
        {
            "binary_version": "2:4.13.14+dfsg-0ubuntu0.20.04.1",
            "binary_name": "libnss-winbind"
        },
        {
            "binary_version": "2:4.13.14+dfsg-0ubuntu0.20.04.1",
            "binary_name": "libpam-winbind"
        },
        {
            "binary_version": "2:4.13.14+dfsg-0ubuntu0.20.04.1",
            "binary_name": "libsmbclient"
        },
        {
            "binary_version": "2:4.13.14+dfsg-0ubuntu0.20.04.1",
            "binary_name": "libsmbclient-dev"
        },
        {
            "binary_version": "2:4.13.14+dfsg-0ubuntu0.20.04.1",
            "binary_name": "libwbclient-dev"
        },
        {
            "binary_version": "2:4.13.14+dfsg-0ubuntu0.20.04.1",
            "binary_name": "libwbclient0"
        },
        {
            "binary_version": "2:4.13.14+dfsg-0ubuntu0.20.04.1",
            "binary_name": "python3-samba"
        },
        {
            "binary_version": "2:4.13.14+dfsg-0ubuntu0.20.04.1",
            "binary_name": "registry-tools"
        },
        {
            "binary_version": "2:4.13.14+dfsg-0ubuntu0.20.04.1",
            "binary_name": "samba"
        },
        {
            "binary_version": "2:4.13.14+dfsg-0ubuntu0.20.04.1",
            "binary_name": "samba-common"
        },
        {
            "binary_version": "2:4.13.14+dfsg-0ubuntu0.20.04.1",
            "binary_name": "samba-common-bin"
        },
        {
            "binary_version": "2:4.13.14+dfsg-0ubuntu0.20.04.1",
            "binary_name": "samba-dev"
        },
        {
            "binary_version": "2:4.13.14+dfsg-0ubuntu0.20.04.1",
            "binary_name": "samba-dsdb-modules"
        },
        {
            "binary_version": "2:4.13.14+dfsg-0ubuntu0.20.04.1",
            "binary_name": "samba-libs"
        },
        {
            "binary_version": "2:4.13.14+dfsg-0ubuntu0.20.04.1",
            "binary_name": "samba-testsuite"
        },
        {
            "binary_version": "2:4.13.14+dfsg-0ubuntu0.20.04.1",
            "binary_name": "samba-vfs-modules"
        },
        {
            "binary_version": "2:4.13.14+dfsg-0ubuntu0.20.04.1",
            "binary_name": "smbclient"
        },
        {
            "binary_version": "2:4.13.14+dfsg-0ubuntu0.20.04.1",
            "binary_name": "winbind"
        }
    ]
}

Ubuntu:22.04:LTS / samba

Package

Name
samba
Purl
pkg:deb/ubuntu/samba@2:4.13.14+dfsg-0ubuntu1?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:4.13.14+dfsg-0ubuntu1

Affected versions

2:4.*

2:4.13.5+dfsg-2ubuntu2
2:4.13.5+dfsg-2ubuntu3

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "2:4.13.14+dfsg-0ubuntu1",
            "binary_name": "ctdb"
        },
        {
            "binary_version": "2:4.13.14+dfsg-0ubuntu1",
            "binary_name": "libnss-winbind"
        },
        {
            "binary_version": "2:4.13.14+dfsg-0ubuntu1",
            "binary_name": "libpam-winbind"
        },
        {
            "binary_version": "2:4.13.14+dfsg-0ubuntu1",
            "binary_name": "libsmbclient"
        },
        {
            "binary_version": "2:4.13.14+dfsg-0ubuntu1",
            "binary_name": "libsmbclient-dev"
        },
        {
            "binary_version": "2:4.13.14+dfsg-0ubuntu1",
            "binary_name": "libwbclient-dev"
        },
        {
            "binary_version": "2:4.13.14+dfsg-0ubuntu1",
            "binary_name": "libwbclient0"
        },
        {
            "binary_version": "2:4.13.14+dfsg-0ubuntu1",
            "binary_name": "python3-samba"
        },
        {
            "binary_version": "2:4.13.14+dfsg-0ubuntu1",
            "binary_name": "registry-tools"
        },
        {
            "binary_version": "2:4.13.14+dfsg-0ubuntu1",
            "binary_name": "samba"
        },
        {
            "binary_version": "2:4.13.14+dfsg-0ubuntu1",
            "binary_name": "samba-common"
        },
        {
            "binary_version": "2:4.13.14+dfsg-0ubuntu1",
            "binary_name": "samba-common-bin"
        },
        {
            "binary_version": "2:4.13.14+dfsg-0ubuntu1",
            "binary_name": "samba-dev"
        },
        {
            "binary_version": "2:4.13.14+dfsg-0ubuntu1",
            "binary_name": "samba-dsdb-modules"
        },
        {
            "binary_version": "2:4.13.14+dfsg-0ubuntu1",
            "binary_name": "samba-libs"
        },
        {
            "binary_version": "2:4.13.14+dfsg-0ubuntu1",
            "binary_name": "samba-testsuite"
        },
        {
            "binary_version": "2:4.13.14+dfsg-0ubuntu1",
            "binary_name": "samba-vfs-modules"
        },
        {
            "binary_version": "2:4.13.14+dfsg-0ubuntu1",
            "binary_name": "smbclient"
        },
        {
            "binary_version": "2:4.13.14+dfsg-0ubuntu1",
            "binary_name": "winbind"
        }
    ]
}