CVE-2021-27212
Summary
| CVE | CVE-2021-27212 |
|---|---|
| State | PUBLISHED |
| Assigner | mitre |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2021-02-14 03:15:12 UTC |
| Updated | 2026-10-14 12:17:09 UTC |
| Description | In OpenLDAP through 2.4.57 and 2.5.x through 2.5.1alpha, an assertion failure in slapd can occur in the issuerAndThisUpdateCheck function via a crafted packet, resulting in a denial of service (daemon exit) via a short timestamp. This is related to schema_init.c and checkTime. |
Risk And Classification
Primary CVSS: v3.1 7.5 HIGH from [email protected]
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Problem Types: CWE-617 | n/a
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 2.0 | [email protected] | Primary | 5 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
NoneAvailability
HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v2.0 Breakdown
Access Vector
NetworkAccess Complexity
LowAuthentication
NoneConfidentiality
NoneIntegrity
NoneAvailability
PartialAV:N/AC:L/Au:N/C:N/I:N/A:P
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Debian | Debian Linux | 10.0 | All | All | All |
| Operating System | Debian | Debian Linux | 9.0 | All | All | All |
| Application | Openldap | Openldap | 2.5.0 | alpha | All | All |
| Application | Openldap | Openldap | 2.5.1 | alpha | All | All |
| Application | Openldap | Openldap | All | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Na | N/a | affected n/a | Not specified |
| ADP | Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP | affected V3.1.0 V3.1.5 custom | Not specified |
| ADP | Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP | affected V3.1.0 V3.1.5 custom | Not specified |
| ADP | Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP | affected V3.1.0 V3.1.5 custom | Not specified |
| ADP | Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP | affected V3.1.0 V3.1.5 custom | Not specified |
| ADP | Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP | affected V3.1.0 V3.1.5 custom | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| cert-portal.siemens.com/productcert/html/ssa-398330.html | 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e | cert-portal.siemens.com | |
| CVE-2021-27212 OpenLDAP Vulnerability in NetApp Products | NetApp Product Security | af854a3a-2127-422b-91ae-364da2661108 | security.netapp.com | Third Party Advisory |
| Debian -- Security Information -- DSA-4860-1 openldap | af854a3a-2127-422b-91ae-364da2661108 | www.debian.org | Third Party Advisory |
| ITS#9454 fix issuerAndThisUpdateCheck (9badb734) · Commits · openldap / OpenLDAP · GitLab | af854a3a-2127-422b-91ae-364da2661108 | git.openldap.org | Patch, Vendor Advisory |
| [SECURITY] [DLA 2574-1] openldap security update | af854a3a-2127-422b-91ae-364da2661108 | lists.debian.org | Mailing List, Third Party Advisory |
| lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e69... | af854a3a-2127-422b-91ae-364da2661108 | lists.apache.org | |
| 9454 – A malicious packet can force OpenLDAP to fail an assertion and crash (schema_init.c:3808: checkTime) | af854a3a-2127-422b-91ae-364da2661108 | bugs.openldap.org | Exploit, Issue Tracking, Vendor Advisory |
| ITS#9454 fix issuerAndThisUpdateCheck (3539fc33) · Commits · openldap / OpenLDAP · GitLab | af854a3a-2127-422b-91ae-364da2661108 | git.openldap.org | Patch, Vendor Advisory |
| lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450... | af854a3a-2127-422b-91ae-364da2661108 | lists.apache.org | |
| Pony Mail! | MITRE | lists.apache.org | |
| Pony Mail! | MITRE | lists.apache.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
Legacy QID Mappings
- 174780 SUSE Enterprise Linux Security update for openldap2 (SUSE-SU-2021:0692-1)
- 174783 SUSE Enterprise Linux Security update for openldap2 (SUSE-SU-2021:0723-1)
- 174918 SUSE Enterprise Linux Security Update for openldap2 (SUSE-SU-2021:14700-1)
- 180396 Debian Security Update for openldap (CVE-2021-27212)
- 354907 Amazon Linux Security Advisory for openldap : ALAS2-2023-2033
- 354925 Amazon Linux Security Advisory for openldap : ALAS-2023-1741
- 355082 Amazon Linux Security Advisory for openldap : AL2012-2023-407
- 355117 Amazon Linux Security Advisory for openldap : ALAS2023-2023-177
- 500481 Alpine Linux Security Update for openldap
- 501460 Alpine Linux Security Update for openldap
- 504240 Alpine Linux Security Update for openldap
- 591406 Siemens SIMATIC S7-1500 CPU GNU/Linux subsystem Multiple Vulnerabilities (SSB-439005, ICSA-22-104-13)
- 670252 EulerOS Security Update for openldap (EulerOS-SA-2021-1824)
- 670318 EulerOS Security Update for openldap (EulerOS-SA-2021-1906)
- 670343 EulerOS Security Update for openldap (EulerOS-SA-2021-1881)
- 670371 EulerOS Security Update for openldap (EulerOS-SA-2021-1954)
- 670392 EulerOS Security Update for openldap (EulerOS-SA-2021-1933)
- 670657 EulerOS Security Update for openldap (EulerOS-SA-2021-2415)
- 670923 EulerOS Security Update for openldap (EulerOS-SA-2021-1933)
- 750317 OpenSUSE Security Update for openldap2 (openSUSE-SU-2021:0408-1)
- 900160 CBL-Mariner Linux Security Update for openldap 2.4.57
- 901932 Common Base Linux Mariner (CBL-Mariner) Security Update for openldap (6771-1)
- 902849 Common Base Linux Mariner (CBL-Mariner) Security Update for openldap (3886)