CVE-2021-27212

high

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

Advisories
More

https://www.debian.org/security/2021/dsa-4860

https://security.netapp.com/advisory/ntap-20210319-0005/

https://lists.debian.org/debian-lts-announce/2021/02/msg00035.html

https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E

https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E

https://git.openldap.org/openldap/openldap/-/commit/9badb73425a67768c09bcaed1a9c26c684af6c30

https://git.openldap.org/openldap/openldap/-/commit/3539fc33212b528c56b716584f2c2994af7c30b0

https://euvd.enisa.europa.eu/vulnerability/EUVD-2021-13977

https://cert-portal.siemens.com/productcert/html/ssa-398330.html

https://bugs.openldap.org/show_bug.cgi?id=9454

Details

Source: Mitre, NVD

Published: 2021-02-14

Updated: 2026-10-14

Risk Information

CVSS v2

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

Severity: Medium

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Severity: High

EPSS

EPSS: 0.66114