CVE-2020-25721: Input Validation
First published: Tue Nov 09 2021(Updated: )
Kerberos acceptors need easy access to stable AD identifiers (eg objectSid). Samba as an AD DC now provides a way for Linux applications to obtain a reliable SID (and samAccountName) in issued tickets.
Credit: secalert@redhat.com secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Samba Samba | >=4.13.0<4.13.14 | |
| Samba Samba | >=4.14.0<4.14.10 | |
| Samba Samba | >=4.15.0<4.15.2 | |
| redhat/samba | <4.15.2 | 4.15.2 |
| redhat/samba | <4.14.10 | 4.14.10 |
| redhat/samba | <4.13.14 | 4.13.14 |
| ubuntu/samba | <2:4.13.14+dfsg-0ubuntu0.20.04.1 | 2:4.13.14+dfsg-0ubuntu0.20.04.1 |
| ubuntu/samba | <2:4.13.14+dfsg-0ubuntu0.21.04.1 | 2:4.13.14+dfsg-0ubuntu0.21.04.1 |
| ubuntu/samba | <2:4.13.14+dfsg-0ubuntu0.21.10.1 | 2:4.13.14+dfsg-0ubuntu0.21.10.1 |
| ubuntu/samba | <2:4.13.14+dfsg-0ubuntu1 | 2:4.13.14+dfsg-0ubuntu1 |
| ubuntu/samba | <2:4.13.14+dfsg-0ubuntu1 | 2:4.13.14+dfsg-0ubuntu1 |
| ubuntu/samba | <2:4.13.14+dfsg-0ubuntu1 | 2:4.13.14+dfsg-0ubuntu1 |
| ubuntu/samba | <4.13.14 | 4.13.14 |
| debian/samba | <=2:4.9.5+dfsg-5+deb10u3<=2:4.9.5+dfsg-5+deb10u5 | 2:4.13.13+dfsg-1~deb11u5 2:4.13.13+dfsg-1~deb11u6 2:4.17.12+dfsg-0+deb12u1 2:4.19.6+dfsg-1 2:4.19.6+dfsg-3 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=2021728
- https://bugzilla.samba.org/show_bug.cgi?id=14725
- https://security.gentoo.org/glsa/202309-06
- https://www.samba.org/samba/security/CVE-2020-25721.html
- https://launchpad.net/bugs/cve/CVE-2020-25721
- https://access.redhat.com/security/cve/CVE-2020-25717
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2021729
- https://bugzilla.samba.org/show_bug.cgi?id=14557
- https://security-tracker.debian.org/tracker/CVE-2020-25721
- https://www.samba.org/samba/history/samba-4.13.14.html
- https://ubuntu.com/security/notices/USN-5142-1
- https://www.cve.org/CVERecord?id=CVE-2020-25721
- https://nvd.nist.gov/vuln/detail/CVE-2020-25721
- https://ubuntu.com/security/CVE-2020-25721
Frequently Asked Questions
What is the vulnerability ID?
The vulnerability ID is CVE-2020-25721.
What is the severity of CVE-2020-25721?
The severity of CVE-2020-25721 is high with a CVSS score of 8.8.
What software versions are affected by CVE-2020-25721?
Samba versions 4.13.0 to 4.13.14, 4.14.0 to 4.14.10, and 4.15.0 to 4.15.2 are affected.
How can Linux applications obtain a reliable SID and samAccountName in issued tickets with Samba?
Samba as an Active Directory Domain Controller provides a way for Linux applications to obtain a reliable SID and samAccountName in issued tickets.
Where can I find more information about CVE-2020-25721?
You can find more information about CVE-2020-25721 in the following references: [Bugzilla Red Hat](https://bugzilla.redhat.com/show_bug.cgi?id=2021728), [Bugzilla Samba](https://bugzilla.samba.org/show_bug.cgi?id=14725), [Gentoo Security](https://security.gentoo.org/glsa/202309-06).
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