CVE-2021-27212

openldap: Assertion failure in slapd in the issuerAndThisUpdateCheck function

Published Feb 14, 2021 CVSS 3.1 · 7.5 High EPSS 66.1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-2574-1 openldap security update
Debian DSA Debian DSA DSA-4860-1 openldap security update
Ubuntu USN Ubuntu USN USN-4744-1 OpenLDAP vulnerability
Ubuntu USN Ubuntu USN USN-7713-1 OpenLDAP vulnerabilities
Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Oct 14, 2026, 11:34 AM
Reserved
Feb 14, 2021, 12:00 AM
Status
Modified
Published
Feb 14, 2021, 3:15 AM
Modified
Oct 14, 2026, 12:17 PM
Severity
Moderate
Public date
Feb 14, 2021, 12:00 AM