NULL pointer dereference in openldap
Priority LOW 39CWE-476Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 9 fixed, 2 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-476.
Summary
A NULL pointer dereference was found in OpenLDAP server and was fixed in openldap 2.4.55, during a request for renaming RDNs. An unauthenticated attacker could remotely crash the slapd process by sending a specially crafted request, causing a Denial of Service.
Why it matters now
EPSS 0.0315 88th percentileScored 2026-11-07
Fix Partial Red Hat: 1 advisoryRed Hat: 9 fixed, 2 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | openldap | openldap 2.4.55 | — | No fix listed | CNA |
- openldap Vendor— Affected openldap 2.4.55 Fixed in — No fix listed CNA
CPE configurations NVD · 7
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:openldap:openldap:*:*:*:*:*:*:*:* | before 2.4.55 | Vulnerable | openldap |
| cpe:2.3:o:redhat:enterprise_linux:5.0:*:*:*:*:*:*:* | 5.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* | 6.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:o:netapp:solidfire_baseboard_management_controller_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:solidfire_baseboard_management_controller:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
- cpe:2.3:a:openldap:openldap:*:*:*:*:*:*:*:* Versions before 2.4.55 Vulnerable ·openldap
- cpe:2.3:o:redhat:enterprise_linux:5.0:*:*:*:*:*:*:* Versions 5.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:o:netapp:solidfire_baseboard_management_controller_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:solidfire_baseboard_management_controller:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
Remediation
Red Hat 1 advisory
- RHSA-2021:1389 Released 2021-04-27 · Red Hat rating Moderateopenldap security update
- Red Hat Enterprise Linux Client (v. 7) openldap-2.4.44-23.el7_9, openldap-clients-2.4.44-23.el7_9
- Red Hat Enterprise Linux Client Optional (v. 7) openldap-devel-2.4.44-23.el7_9, openldap-servers-2.4.44-23.el7_9, openldap-servers-sql-2.4.44-23.el7_9
- Red Hat Enterprise Linux ComputeNode Optional (v. 7) openldap-devel-2.4.44-23.el7_9, openldap-servers-2.4.44-23.el7_9, openldap-servers-sql-2.4.44-23.el7_9
- Red Hat Enterprise Linux Server (v. 7) openldap-2.4.44-23.el7_9, openldap-2.4.44-23.el7_9.ppc, openldap-clients-2.4.44-23.el7_9 +3
- Red Hat Enterprise Linux Server Optional (v. 7) openldap-servers-sql-2.4.44-23.el7_9
- Red Hat Enterprise Linux Workstation (v. 7) openldap-2.4.44-23.el7_9, openldap-clients-2.4.44-23.el7_9, openldap-devel-2.4.44-23.el7_9 +1
- Red Hat Enterprise Linux Workstation Optional (v. 7) openldap-servers-sql-2.4.44-23.el7_9
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 5 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| 7Server-RHMTC-1.4 | Fixed | — |
| 8Base-RHMTC-1.4 | Fixed | — |
| Red Hat Enterprise Linux Client (v. 7) | Fixed | RHSA-2021:1389 |
| Red Hat Enterprise Linux Client Optional (v. 7) | Fixed | RHSA-2021:1389 |
| Red Hat Enterprise Linux ComputeNode Optional (v. 7) | Fixed | RHSA-2021:1389 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2021:1389 |
| Red Hat Enterprise Linux Server Optional (v. 7) | Fixed | RHSA-2021:1389 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2021:1389 |
| Red Hat Enterprise Linux Workstation Optional (v. 7) | Fixed | RHSA-2021:1389 |
Not affected: 7 products
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat JBoss Core Services
- Red Hat JBoss Enterprise Application Platform 5
- Red Hat JBoss Enterprise Web Server 2
Timeline
- 2026-10-02 Threatist record created from CVE-2020-25692
- 2026-10-03 Alias added: GHSA-73cr-r2gx-wgq6
References
Sources
- CVE-2020-25692 · CVE Program
- CVE-2020-25692 · NVD
- FIRST EPSS
- GHSA-73cr-r2gx-wgq6 · GitHub Advisory Database · CC BY 4.0
- CVE-2020-25692 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences