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.
Fix
Patch, vendor advisory and mitigation references on NVD 6
- https://bugs.openldap.org/show_bug.cgi?id=9454 Exploit, Issue Tracking, Vendor Advisory
- https://git.openldap.org/openldap/openldap/-/commit/3539fc33212b528c56b716584f2c2994af7c30b0 Patch, Vendor Advisory
- https://git.openldap.org/openldap/openldap/-/commit/9badb73425a67768c09bcaed1a9c26c684af6c30 Patch, Vendor Advisory
- https://bugs.openldap.org/show_bug.cgi?id=9454 Exploit, Issue Tracking, Vendor Advisory
- https://git.openldap.org/openldap/openldap/-/commit/3539fc33212b528c56b716584f2c2994af7c30b0 Patch, Vendor Advisory
- https://git.openldap.org/openldap/openldap/-/commit/9badb73425a67768c09bcaed1a9c26c684af6c30 Patch, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 7.5 · openldap, debianNVD modified 2026-10-14 12:17
Affected (CPE criteria) 5
cpe:2.3:a:openldap:openldap:*:*:*:*:*:*:*:*cpe:2.3:a:openldap:openldap:2.5.0:alpha:*:*:*:*:*:*cpe:2.3:a:openldap:openldap:2.5.1:alpha:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
References 17
- https://bugs.openldap.org/show_bug.cgi?id=9454 Exploit, Issue Tracking, Vendor Advisory
- https://git.openldap.org/openldap/openldap/-/commit/3539fc33212b528c56b716584f2c2994af7c30b0 Patch, Vendor Advisory
- https://git.openldap.org/openldap/openldap/-/commit/9badb73425a67768c09bcaed1a9c26c684af6c30 Patch, Vendor Advisory
- https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
- https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
- https://lists.debian.org/debian-lts-announce/2021/02/msg00035.html Mailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210319-0005/ Third Party Advisory
- https://www.debian.org/security/2021/dsa-4860 Third Party Advisory
- https://bugs.openldap.org/show_bug.cgi?id=9454 Exploit, Issue Tracking, Vendor Advisory
- https://git.openldap.org/openldap/openldap/-/commit/3539fc33212b528c56b716584f2c2994af7c30b0 Patch, Vendor Advisory
- https://git.openldap.org/openldap/openldap/-/commit/9badb73425a67768c09bcaed1a9c26c684af6c30 Patch, Vendor Advisory
- https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
- https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
- https://lists.debian.org/debian-lts-announce/2021/02/msg00035.html Mailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210319-0005/ Third Party Advisory
- https://www.debian.org/security/2021/dsa-4860 Third Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html