# CVE-2020-10745: ctdb: A flaw was found in all Samba versions before 4.10.17, before 4.11.11 and before 4.12.4 in the way it processed NetBi...

CVE-2020-10745 is fixed in 18 products on 1 platform, first by ctdb 2:4.7.6+dfsg~ubuntu-0ubuntu2.17, released July 1, 2020. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2020-10745
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0387
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 1, 2020

## Description

A flaw was found in all Samba versions before 4.10.17, before 4.11.11 and before 4.12.4 in the way it processed NetBios over TCP/IP. This flaw allows a remote attacker could to cause the Samba server to consume excessive CPU use, resulting in a denial of service. This highest threat from this vulnerability is to system availability.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | ctdb Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.17 | [ctdb 2:4.7.6+dfsg~ubuntu-0ubuntu2.17](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-ctdb-2-4.7.6-dfsg-ubuntu-0ubuntu2.17.md) | Jul 1, 2020 |
| Linux | ctdb Ubuntu 20.04 LTS (focal) | 2:4.11.6+dfsg-0ubuntu1.3 | [ctdb 2:4.11.6+dfsg-0ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-ctdb-2-4.11.6-dfsg-0ubuntu1.3.md) | Jul 1, 2020 |
| Linux | libnss-winbind Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.17 | [libnss-winbind 2:4.7.6+dfsg~ubuntu-0ubuntu2.17](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libnss-winbind-2-4.7.6-dfsg-ubuntu-0ubuntu2.17.md) | Jul 1, 2020 |
| Linux | libnss-winbind Ubuntu 20.04 LTS (focal) | 2:4.11.6+dfsg-0ubuntu1.3 | [libnss-winbind 2:4.11.6+dfsg-0ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libnss-winbind-2-4.11.6-dfsg-0ubuntu1.3.md) | Jul 1, 2020 |
| Linux | libpam-winbind Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.17 | [libpam-winbind 2:4.7.6+dfsg~ubuntu-0ubuntu2.17](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libpam-winbind-2-4.7.6-dfsg-ubuntu-0ubuntu2.17.md) | Jul 1, 2020 |
| Linux | libpam-winbind Ubuntu 20.04 LTS (focal) | 2:4.11.6+dfsg-0ubuntu1.3 | [libpam-winbind 2:4.11.6+dfsg-0ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libpam-winbind-2-4.11.6-dfsg-0ubuntu1.3.md) | Jul 1, 2020 |
| Linux | libparse-pidl-perl Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.17 | [libparse-pidl-perl 2:4.7.6+dfsg~ubuntu-0ubuntu2.17](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libparse-pidl-perl-2-4.7.6-dfsg-ubuntu-0ubuntu2.17.md) | Jul 1, 2020 |
| Linux | libsmbclient Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.17 | [libsmbclient 2:4.7.6+dfsg~ubuntu-0ubuntu2.17](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libsmbclient-2-4.7.6-dfsg-ubuntu-0ubuntu2.17.md) | Jul 1, 2020 |
| Linux | libsmbclient Ubuntu 20.04 LTS (focal) | 2:4.11.6+dfsg-0ubuntu1.3 | [libsmbclient 2:4.11.6+dfsg-0ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libsmbclient-2-4.11.6-dfsg-0ubuntu1.3.md) | Jul 1, 2020 |
| Linux | libwbclient0 Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.17 | [libwbclient0 2:4.7.6+dfsg~ubuntu-0ubuntu2.17](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libwbclient0-2-4.7.6-dfsg-ubuntu-0ubuntu2.17.md) | Jul 1, 2020 |
| Linux | libwbclient0 Ubuntu 20.04 LTS (focal) | 2:4.11.6+dfsg-0ubuntu1.3 | [libwbclient0 2:4.11.6+dfsg-0ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libwbclient0-2-4.11.6-dfsg-0ubuntu1.3.md) | Jul 1, 2020 |
| Linux | python-samba Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.17 | [python-samba 2:4.7.6+dfsg~ubuntu-0ubuntu2.17](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python-samba-2-4.7.6-dfsg-ubuntu-0ubuntu2.17.md) | Jul 1, 2020 |
| Linux | python3-samba Ubuntu 20.04 LTS (focal) | 2:4.11.6+dfsg-0ubuntu1.3 | [python3-samba 2:4.11.6+dfsg-0ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-python3-samba-2-4.11.6-dfsg-0ubuntu1.3.md) | Jul 1, 2020 |
| Linux | registry-tools Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.17 | [registry-tools 2:4.7.6+dfsg~ubuntu-0ubuntu2.17](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-registry-tools-2-4.7.6-dfsg-ubuntu-0ubuntu2.17.md) | Jul 1, 2020 |
| Linux | registry-tools Ubuntu 20.04 LTS (focal) | 2:4.11.6+dfsg-0ubuntu1.3 | [registry-tools 2:4.11.6+dfsg-0ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-registry-tools-2-4.11.6-dfsg-0ubuntu1.3.md) | Jul 1, 2020 |
| Linux | samba Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.17 | [samba 2:4.7.6+dfsg~ubuntu-0ubuntu2.17](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-samba-2-4.7.6-dfsg-ubuntu-0ubuntu2.17.md) | Jul 1, 2020 |
| Linux | samba Ubuntu 20.04 LTS (focal) | 2:4.11.6+dfsg-0ubuntu1.3 | [samba 2:4.11.6+dfsg-0ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-samba-2-4.11.6-dfsg-0ubuntu1.3.md) | Jul 1, 2020 |
| Linux | samba-common Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.17 | [samba-common 2:4.7.6+dfsg~ubuntu-0ubuntu2.17](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-samba-common-2-4.7.6-dfsg-ubuntu-0ubuntu2.17.md) | Jul 1, 2020 |
| Linux | samba-common Ubuntu 20.04 LTS (focal) | 2:4.11.6+dfsg-0ubuntu1.3 | [samba-common 2:4.11.6+dfsg-0ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-samba-common-2-4.11.6-dfsg-0ubuntu1.3.md) | Jul 1, 2020 |
| Linux | samba-common-bin Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.17 | [samba-common-bin 2:4.7.6+dfsg~ubuntu-0ubuntu2.17](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-samba-common-bin-2-4.7.6-dfsg-ubuntu-0ubuntu2.17.md) | Jul 1, 2020 |
| Linux | samba-common-bin Ubuntu 20.04 LTS (focal) | 2:4.11.6+dfsg-0ubuntu1.3 | [samba-common-bin 2:4.11.6+dfsg-0ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-samba-common-bin-2-4.11.6-dfsg-0ubuntu1.3.md) | Jul 1, 2020 |
| Linux | samba-dsdb-modules Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.17 | [samba-dsdb-modules 2:4.7.6+dfsg~ubuntu-0ubuntu2.17](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-samba-dsdb-modules-2-4.7.6-dfsg-ubuntu-0ubuntu2.17.md) | Jul 1, 2020 |
| Linux | samba-dsdb-modules Ubuntu 20.04 LTS (focal) | 2:4.11.6+dfsg-0ubuntu1.3 | [samba-dsdb-modules 2:4.11.6+dfsg-0ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-samba-dsdb-modules-2-4.11.6-dfsg-0ubuntu1.3.md) | Jul 1, 2020 |
| Linux | samba-libs Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.17 | [samba-libs 2:4.7.6+dfsg~ubuntu-0ubuntu2.17](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-samba-libs-2-4.7.6-dfsg-ubuntu-0ubuntu2.17.md) | Jul 1, 2020 |
| Linux | samba-libs Ubuntu 20.04 LTS (focal) | 2:4.11.6+dfsg-0ubuntu1.3 | [samba-libs 2:4.11.6+dfsg-0ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-samba-libs-2-4.11.6-dfsg-0ubuntu1.3.md) | Jul 1, 2020 |
| Linux | samba-testsuite Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.17 | [samba-testsuite 2:4.7.6+dfsg~ubuntu-0ubuntu2.17](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-samba-testsuite-2-4.7.6-dfsg-ubuntu-0ubuntu2.17.md) | Jul 1, 2020 |
| Linux | samba-testsuite Ubuntu 20.04 LTS (focal) | 2:4.11.6+dfsg-0ubuntu1.3 | [samba-testsuite 2:4.11.6+dfsg-0ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-samba-testsuite-2-4.11.6-dfsg-0ubuntu1.3.md) | Jul 1, 2020 |
| Linux | samba-vfs-modules Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.17 | [samba-vfs-modules 2:4.7.6+dfsg~ubuntu-0ubuntu2.17](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-samba-vfs-modules-2-4.7.6-dfsg-ubuntu-0ubuntu2.17.md) | Jul 1, 2020 |
| Linux | samba-vfs-modules Ubuntu 20.04 LTS (focal) | 2:4.11.6+dfsg-0ubuntu1.3 | [samba-vfs-modules 2:4.11.6+dfsg-0ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-samba-vfs-modules-2-4.11.6-dfsg-0ubuntu1.3.md) | Jul 1, 2020 |
| Linux | smbclient Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.17 | [smbclient 2:4.7.6+dfsg~ubuntu-0ubuntu2.17](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-smbclient-2-4.7.6-dfsg-ubuntu-0ubuntu2.17.md) | Jul 1, 2020 |
| Linux | smbclient Ubuntu 20.04 LTS (focal) | 2:4.11.6+dfsg-0ubuntu1.3 | [smbclient 2:4.11.6+dfsg-0ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-smbclient-2-4.11.6-dfsg-0ubuntu1.3.md) | Jul 1, 2020 |
| Linux | winbind Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.17 | [winbind 2:4.7.6+dfsg~ubuntu-0ubuntu2.17](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-winbind-2-4.7.6-dfsg-ubuntu-0ubuntu2.17.md) | Jul 1, 2020 |
| Linux | winbind Ubuntu 20.04 LTS (focal) | 2:4.11.6+dfsg-0ubuntu1.3 | [winbind 2:4.11.6+dfsg-0ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-winbind-2-4.11.6-dfsg-0ubuntu1.3.md) | Jul 1, 2020 |

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