by Kastro CVE-2026-86345
Red Hat Red Hat Directory Server 11 — 389-ds-base: 389-ds-base: starttls plaintext-buffer retention allows on-path attacker to forge an ldap client's authentication result
Description · from the CVE record
A flaw was found in 389-ds-base. The server does not discard plaintext bytes already buffered from a client connection when negotiating StartTLS, allowing an on-path attacker to inject a crafted LDAP message that is processed after the TLS upgrade and whose response is delivered to the client in place of the client's own pending operation's response, due to messageID collision. This can cause a client application to treat a failed authentication (bind) attempt as successful.
Affected
ProductAffectedFixed inSource
Red Hat Directory Server 11see advisory–CNA
Red Hat Directory Server 11see advisory–CNA
Red Hat Directory Server 12see advisory–CNA
Red Hat Directory Server 12see advisory–CNA
Red Hat Directory Server 13see advisory–CNA
Red Hat Enterprise Linux 10see advisory–CNA
Red Hat Enterprise Linux 6see advisory–CNA
Red Hat Enterprise Linux 7see advisory–CNA
Red Hat Enterprise Linux 8see advisory–CNA
Red Hat Enterprise Linux 8see advisory–CNA
Red Hat Enterprise Linux 9see advisory–CNA
Scores by source
redhat (CNA)9.0CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total