CVE-2020-14323: Null Pointer Dereference
First published: Tue Oct 27 2020(Updated: )
A null pointer dereference flaw was found in samba's Winbind service in versions before 4.11.15, before 4.12.9 and before 4.13.1. A local user could use this flaw to crash the winbind service causing denial of service.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Samba Samba | >=3.6.0<4.11.15 | |
| Samba Samba | >=4.12.0<4.12.9 | |
| Samba Samba | >=4.13.0<4.13.1 | |
| openSUSE Leap | =15.1 | |
| openSUSE Leap | =15.2 | |
| Fedoraproject Fedora | =32 | |
| Fedoraproject Fedora | =33 | |
| Debian Debian Linux | =9.0 | |
| redhat/samba | <4.11.15 | 4.11.15 |
| redhat/samba | <4.12.9 | 4.12.9 |
| redhat/samba | <4.13.1 | 4.13.1 |
| >=3.6.0<4.11.15 | ||
| >=4.12.0<4.12.9 | ||
| >=4.13.0<4.13.1 | ||
| =15.1 | ||
| =15.2 | ||
| =32 | ||
| =33 | ||
| =9.0 |
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Reference Links
- http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00008.html
- http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00012.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1891685
- https://lists.debian.org/debian-lts-announce/2020/11/msg00041.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JE2M4FE3N3EDXVG4UKSVFPL7SQUGFFDP/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/W6HM73N4NEGFW5GIJJGGP6ZZBS6GTXPB/
- https://security.gentoo.org/glsa/202012-24
- https://security.netapp.com/advisory/ntap-20201103-0001/
- https://www.samba.org/samba/security/CVE-2020-14323.html
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1892628
- https://git.samba.org/?p=samba.git;a=commit;h=595dd9fc4162dd70ad937db8669a0fddbbba9584
- https://git.samba.org/?p=samba.git;a=commit;h=0b259a48a70bde4dfd482e0720e593ae5a9c414a
- https://git.samba.org/?p=samba.git;a=commit;h=f17967ad73e9c1d2bd6e0b7c181f08079d2a8214
- https://git.samba.org/?p=samba.git;a=commit;h=d0ca2a63aaedf123205337aaa211426175ffcebf
- https://git.samba.org/?p=samba.git;a=commit;h=e6fe5b4d64a8e1a03e1aaebafd97f313b3c94342
- https://git.samba.org/?p=samba.git;a=commit;h=6093b2d815a00a577036fa001b47d7fc5514ad2c
- https://access.redhat.com/errata/RHSA-2020:5439
- https://access.redhat.com/security/cve/cve-2020-14323
- https://access.redhat.com/errata/RHSA-2021:1647
- https://access.redhat.com/errata/RHSA-2021:3723
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JE2M4FE3N3EDXVG4UKSVFPL7SQUGFFDP/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W6HM73N4NEGFW5GIJJGGP6ZZBS6GTXPB/
- https://lists.debian.org/debian-lts-announce/2024/04/msg00015.html
Frequently Asked Questions
What is CVE-2020-14323?
CVE-2020-14323 is a null pointer dereference flaw in Samba's Winbind service that can be exploited by a local user to crash the service and cause a denial of service.
Which versions of Samba are affected by CVE-2020-14323?
Versions before 4.11.15, before 4.12.9, and before 4.13.1 of Samba are affected by CVE-2020-14323.
What is the severity of CVE-2020-14323?
CVE-2020-14323 has a severity rating of medium, with a CVSS score of 5.5.
How can a local user exploit CVE-2020-14323?
A local user can exploit CVE-2020-14323 to crash the Winbind service in Samba, causing a denial of service.
Where can I find more information about CVE-2020-14323?
You can find more information about CVE-2020-14323 on the Samba website, Red Hat Bugzilla, and the Samba Git repository.
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