A flaw was found in sambas DNS server. An authenticated user could use this flaw to the RPC server to crash. This RPC server, which also serves protocols other than dnsserver, will be restarted after a short delay, but it is easy for an authenticated non administrative attacker to crash it again as soon as it returns. The Samba DNS server itself will continue to operate, but many RPC services will not.
Weakness
[PLANNED FOR DEPRECATION. SEE MAINTENANCE NOTES AND CONSIDER CWE-252, CWE-248, OR CWE-1069.] Ignoring exceptions and other error conditions may allow an attacker to induce unexpected behavior unnoticed.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Samba | Samba | 4.0.0 (including) | 4.11.15 (excluding) |
| Samba | Samba | 4.12.0 (including) | 4.12.9 (excluding) |
| Samba | Samba | 4.13.0 (including) | 4.13.1 (excluding) |
| Samba | Ubuntu | bionic | * |
| Samba | Ubuntu | devel | * |
| Samba | Ubuntu | esm-infra-legacy/trusty | * |
| Samba | Ubuntu | esm-infra/bionic | * |
| Samba | Ubuntu | esm-infra/focal | * |
| Samba | Ubuntu | esm-infra/xenial | * |
| Samba | Ubuntu | focal | * |
| Samba | Ubuntu | groovy | * |
| Samba | Ubuntu | hirsute | * |
| Samba | Ubuntu | trusty | * |
| Samba | Ubuntu | trusty/esm | * |
| Samba | Ubuntu | upstream | * |
| Samba | Ubuntu | xenial | * |
Potential Mitigations
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1892636
- https://lists.debian.org/debian-lts-announce/2024/04/msg00015.html
- https://security.gentoo.org/glsa/202012-24
- https://www.samba.org/samba/security/CVE-2020-14383.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1892636
- https://lists.debian.org/debian-lts-announce/2024/04/msg00015.html
- https://security.gentoo.org/glsa/202012-24
- https://www.samba.org/samba/security/CVE-2020-14383.html