CVE-2021-27212

HIGH

OpenLDAP < 2.4.57 and 2.5.x < 2.5.1alpha - Denial of Service via Crafted Packet in issuerAndThisUpdateCheck

Title source: llm
STIX 2.1

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.

References (8)

Core 8
Core References
Exploit, Issue Tracking, Vendor Advisory x_refsource_misc
https://bugs.openldap.org/show_bug.cgi?id=9454
Mailing List, Third Party Advisory mailing-list x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2021/02/msg00035.html
Third Party Advisory vendor-advisory x_refsource_debian
https://www.debian.org/security/2021/dsa-4860
Third Party Advisory x_refsource_confirm
https://security.netapp.com/advisory/ntap-20210319-0005/

Scores

CVSS v3 7.5
EPSS 0.6415
EPSS Percentile 99.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-617
Status published
Products (5)
debian/debian_linux 9.0
debian/debian_linux 10.0
openldap/openldap 2.5.0 alpha
openldap/openldap 2.5.1 alpha
openldap/openldap < 2.4.57
Published Feb 14, 2021
Tracked Since Feb 18, 2026