Description
A flaw was found in the way an LDAP search expression could crash the shared LDAP server process of a samba AD DC in samba before version 4.10. An authenticated user, having read permissions on the LDAP server, could use this flaw to cause denial of service.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | samba | 2:4.9.5+dfsg-1 | — |
| Debian 13 | samba | 2:4.9.5+dfsg-1 | — |
| Debian 12 | samba | 2:4.9.5+dfsg-1 | — |
| Debian 9 | ldb | 2:1.1.27-1+deb9u1 | DSA-4397-1 |
| Debian 8 | ldb | 2:1.1.20-0+deb8u2 | DLA-1699-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | ldb | 2:1.2.3-1ubuntu0.1 | USN-3895-1 |
| Ubuntu 16.04 LTS | ldb | 2:1.1.24-1ubuntu3.1 | USN-3895-1 |
| Ubuntu 14.04 LTS | ldb | 1:1.1.24-0ubuntu0.14.04.2 | USN-3895-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 | ldb | 1.2.3-3.8.1 | SUSE-SU-2019:0639-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | ldb | 2.3.0-1.3 | openSUSE-SU-2024:10911-1 |
| openSUSE Tumbleweed | samba | 4.14.6+git.182.2205d5224e3-1.1 | openSUSE-SU-2024:11365-1 |
| openSUSE Leap 15.0 | ldb | 1.2.3-lp150.7.2 | openSUSE-SU-2019:1163-1 |
Advisories 8
- WID-SEC-2026-3121 Samba: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Aug 31, 2026
- USN-3895-1 ldb vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-4397-1 ldb - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1699-1 ldb - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:11365-1 ctdb-4.14.6+git.182.2205d5224e3-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:0639-1 Security update for ldb SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:1163-1 Security update for ldb SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10911-1 ldb-tools-2.3.0-1.3 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- [debian-lts-announce] 20190301 [SECURITY] [DLA 1699-1] ldb security update mailing-list
- DSA-4397 vendor-advisory
- https://bugzilla.samba.org/show_bug.cgi?id=13773
- USN-3895-1 vendor-advisory
- 107347 vdb-entry
- https://security.netapp.com/advisory/ntap-20190226-0001/
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3824
- openSUSE-SU-2019:1163 vendor-advisory