Description
contrib/slapd-modules/nops/nops.c in OpenLDAP through 2.4.45, when both the nops module and the memberof overlay are enabled, attempts to free a buffer that was allocated on the stack, which allows remote attackers to cause a denial of service (slapd crash) via a member MODDN operation.
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 | openldap | No fix yet | — |
| Debian 13 | openldap | No fix yet | — |
| Debian 12 | openldap | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | openldap2 | 2.4.46-9.19.2 | SUSE-SU-2019:2395-1 |
| SLES 15 | openldap2 | 2.4.46-9.19.2 | SUSE-SU-2019:2395-1 |
| SLES 12 SP4 | openldap2 | 2.4.41-18.43.1 | SUSE-SU-2018:4150-1 |
| SLES 12 SP3 | openldap2 | 2.4.41-18.43.1 | SUSE-SU-2018:4150-1 |
| SLES 12 SP1 | openldap2 | 2.4.41-18.24.9.7 | SUSE-SU-2019:0931-1 |
| SLES 12 SP1 | openldap2-client | 2.4.41-18.24.9.1 | SUSE-SU-2019:0931-1 |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 | openldap2 | 2.4.41-18.24.9.7 | SUSE-SU-2019:0931-1 |
| SLES 12 | openldap2-client | 2.4.41-18.24.9.1 | SUSE-SU-2019:0931-1 |
| SLES for SAP 12 SP4 | openldap2 | 2.4.41-18.24.9.7 | SUSE-SU-2019:0931-1, SUSE-SU-2018:4150-1 |
| SLES for SAP 12 SP3 | openldap2 | 2.4.41-18.24.9.7 | SUSE-SU-2019:0931-1, SUSE-SU-2018:4150-1 |
| SLES for SAP 12 SP2 | openldap2 | 2.4.41-18.24.9.7 | SUSE-SU-2019:0931-1 |
| SLES for SAP 12 SP1 | openldap2 | 2.4.41-18.24.9.7 | SUSE-SU-2019:0931-1 |
| SLES for SAP 12 SP1 | openldap2-client | 2.4.41-18.24.9.1 | SUSE-SU-2019:0931-1 |
| SLES for SAP 12 | openldap2 | 2.4.41-18.24.9.7 | SUSE-SU-2019:0931-1 |
| SLES for SAP 12 | openldap2-client | 2.4.41-18.24.9.1 | SUSE-SU-2019:0931-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.1 | openldap2 | 2.4.46-lp151.10.3.1 | openSUSE-SU-2019:2157-1 |
| openSUSE Leap 15.0 | openldap2 | 2.4.46-lp150.13.1 | openSUSE-SU-2019:2176-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | openldap | 2.4.46-r0 | — |
| Alpine v3.23 | openldap | 2.4.46-r0 | — |
| Alpine v3.22 | openldap | 2.4.46-r0 | — |
| Alpine v3.21 | openldap | 2.4.46-r0 | — |
| Alpine v3.20 | openldap | 2.4.46-r0 | — |
Show 13 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | openldap | 2.4.46-r0 | — |
| Alpine v3.18 | openldap | 2.4.46-r0 | — |
| Alpine v3.17 | openldap | 2.4.46-r0 | — |
| Alpine v3.16 | openldap | 2.4.46-r0 | — |
| Alpine v3.15 | openldap | 2.4.46-r0 | — |
| Alpine v3.14 | openldap | 2.4.46-r0 | — |
| Alpine v3.13 | openldap | 2.4.46-r0 | — |
| Alpine v3.12 | openldap | 2.4.46-r0 | — |
| Alpine v3.11 | openldap | 2.4.46-r0 | — |
| Alpine v3.10 | openldap | 2.4.46-r0 | — |
| Alpine v3.9 | openldap | 2.4.46-r0 | — |
| Alpine v3.8 | openldap | 2.4.46-r0 | — |
| Alpine v3.7 | openldap | 2.4.46-r0 | — |
Advisories 6
- SUSE-SU-2019:2395-1 Security update for openldap2 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:2157-1 Security update for openldap2 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:2176-1 Security update for openldap2 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:0931-1 Security update for openldap2 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:4150-1 Security update for openldap2 SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2024-3164 OpenLDAP: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Oct 14, 2024