Description
A flaw was found in OpenLDAP. This flaw allows an attacker who can send a malicious packet to be processed by OpenLDAP’s slapd server, to trigger an assertion failure. The highest threat from this vulnerability is to system availability.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | OpenLDAP | openldap 2.4.56 | — |
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 | 2.4.56+dfsg-1 | — |
| Debian 13 | openldap | 2.4.56+dfsg-1 | — |
| Debian 12 | openldap | 2.4.56+dfsg-1 | — |
| Debian 10 | openldap | 2.4.47+dfsg-3+deb10u4 | DSA-4792-1 |
| Debian 9 | openldap | 2.4.44+dfsg-5+deb9u6 | DLA-2481-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | openldap | 2.4.49+dfsg-2ubuntu1.5 | USN-4634-1 |
| Ubuntu 18.04 LTS | openldap | 2.4.45+dfsg-1ubuntu1.8 | USN-4634-1 |
| Ubuntu 16.04 LTS | openldap | 2.4.42+dfsg-2ubuntu3.11 | USN-4634-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | openldap | 2.4.31-1+nmu2ubuntu8.5+esm4 | USN-4634-2 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | openldap +4 | 2.4.44-25.el7_9 | RHSA-2022:0621 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP2 | openldap2 | 2.4.46-9.45.1 | SUSE-SU-2021:0129-1 |
| SLES 12 SP5 | openldap2 | 2.4.41-18.80.1 | SUSE-SU-2021:0128-1 |
| SLES 12 | openldap2 | 2.4.41-18.24.26.1 | SUSE-SU-2021:0142-1 |
| SLES 11 | openldap2-client-openssl1 | 2.4.26-0.74.19.1 | SUSE-SU-2021:14597-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP5 | openldap2 | 2.4.41-18.24.26.1 | SUSE-SU-2021:0142-1, SUSE-SU-2021:0128-1 |
| SLES for SAP 12 SP4 | openldap2 | 2.4.41-18.24.26.1 | SUSE-SU-2021:0142-1 |
| SLES for SAP 12 SP3 | openldap2 | 2.4.41-18.24.26.1 | SUSE-SU-2021:0142-1 |
| SLES for SAP 12 SP2 | openldap2 | 2.4.41-18.24.26.1 | SUSE-SU-2021:0142-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.2 | openldap2 | 2.4.46-lp152.14.15.1 | openSUSE-SU-2021:0107-1 |
| openSUSE Leap 15.1 | openldap2 | 2.4.46-lp151.10.24.1 | openSUSE-SU-2021:0102-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | openldap | 2.4.56-r0 | — |
| Alpine v3.23 | openldap | 2.4.56-r0 | — |
| Alpine v3.22 | openldap | 2.4.56-r0 | — |
| Alpine v3.21 | openldap | 2.4.56-r0 | — |
| Alpine v3.20 | openldap | 2.4.56-r0 | — |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | openldap | 2.4.56-r0 | — |
| Alpine v3.18 | openldap | 2.4.56-r0 | — |
| Alpine v3.17 | openldap | 2.4.56-r0 | — |
| Alpine v3.16 | openldap | 2.4.56-r0 | — |
| Alpine v3.15 | openldap | 2.4.56-r0 | — |
| Alpine v3.14 | openldap | 2.4.56-r0 | — |
| Alpine v3.13 | openldap | 2.4.56-r0 | — |
| Alpine v3.12 | openldap | 2.4.50-r1 | — |
| Alpine v3.11 | openldap | 2.4.48-r3 | — |
| Alpine v3.10 | openldap | 2.4.48-r2 | — |
| Alpine v3.9 | openldap | 2.4.48-r2 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | openldap +4 | 2.4.44-23.amzn2.0.3 | ALAS2-2022-1770 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | openldap +4 | 2.4.44-25.el7_9 | ELSA-2022-0621 |
Advisories 16
- SSA-398330 SSA-398330: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP >= V3.1.0 and < V3.1.5 Siemens ProductCERT · Oct 13, 2026
- RHSA-2022:0621 Red Hat Security Advisory: openldap security update Red Hat Security Advisories (RHSA) · Aug 4, 2026
- USN-4634-1 openldap vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-4634-2 openldap vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-4792-1 openldap - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2481-1 openldap - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2021:0128-1 Security update for openldap2 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:0102-1 Security update for openldap2 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:0142-1 Security update for openldap2 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:14597-1 Security update for openldap2 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:0107-1 Security update for openldap2 SUSE / openSUSE Security Updates · Feb 4, 2026
- ICSA-23-348-10 Siemens SIMATIC S7-1500 CISA ICS & IT advisories · Aug 12, 2025
- SUSE-SU-2021:0129-1 Security update for openldap2 SUSE / openSUSE Security Updates · May 2, 2025
- ICSA-22-116-01 Hitachi Energy System Data Manager CISA ICS & IT advisories · Apr 26, 2022
- ALAS2-2022-1770 Moderate: openldap security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Apr 6, 2022
- ELSA-2022-0621 Moderate: openldap security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Feb 23, 2022
References
- DSA-4792 vendor-advisory
- [debian-lts-announce] 20201204 [SECURITY] [DLA 2481-1] openldap security update mailing-list
- https://support.apple.com/kb/HT212147
- 20210201 APPLE-SA-2021-02-01-1 macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave mailing-list
- https://bugzilla.redhat.com/show_bug.cgi?id=1899675
- [bookkeeper-issues] 20210628 [GitHub] [bookkeeper] padma81 opened a new issue #2746: Security Vulnerabilities in CentOS 7 image, Upgrade image to CentOS 8 mailing-list
- [bookkeeper-issues] 20210629 [GitHub] [bookkeeper] padma81 opened a new issue #2746: Security Vulnerabilities in CentOS 7 image, Upgrade image to CentOS 8 mailing-list
- https://security.netapp.com/advisory/ntap-20210716-0003/