Threats Tagged 'cve-2026-19843'

389 Directory Server is an LDAP version 3 (LDAPv3) compliant server. The base packages include the Lightweight Directory Access Protocol (LDAP) server and command-line utilities for server administration. Security Fix(es): * 389-ds-base: 389-ds-base: heap buffer overflow via SASL wrapped-record length lower-bound underflow in sasl_io_start_packet() (CVE-2026-18355) * 389-ds-base: 389-ds-base: pre-authentication NULL pointer dereference via paged results and USE_ONE_BACKEND control in op_shared_search (CVE-2026-18453) * 389-ds-base: 389-ds-base: SASL PLAIN authentication allows privilege escalation to Directory Manager via stale identity in Cyrus SASL auxiliary property (CVE-2026-18922) * 389-ds-base: 389-ds: anonymous LDAP client can defeat SELFDN ACI bind-rule checks via empty bind DN (CVE-2026-76560) Bug Fix(es) and Enhancement(s): * lib389: set nsDS5ReplicaBindDNGroup before ensure_agreement() [rhel-9.6.z] (JIRA:RHEL-244466) * fix breaks replication total init when nsDS5ReplicaBindDNGroup is set after agreement creation [rhel-9.6.z] (JIRA:RHEL-248765) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

A command injection vulnerability (CVE-2026-19843) exists in the 389-ds-base component of Red Hat Directory Server 12.6 EUS for RHEL 9, specifically via an unescaped LDAP DN in the Cockpit 389 Console LDAP editor. This vulnerability allows injection of arbitrary commands due to improper input handling. Red Hat has issued an important security update to address this issue.

Red Hat Directory Server 12.2 for RHEL 9.2 has multiple critical security vulnerabilities including heap buffer overflow, pre-authentication NULL pointer dereference, privilege escalation via SASL PLAIN authentication, command injection in the Cockpit LDAP editor, and bypass of bind-rule checks by anonymous LDAP clients. These issues affect the 389-ds-base component and can lead to denial of service, privilege escalation, and unauthorized access. Red Hat has released an update addressing these vulnerabilities.

A flaw was found in 389-ds-base. The Cockpit 389 Console's LDAP editor constructs an ldapsearch command by embedding an LDAP entry's distinguished name (DN) into a shell command string without proper escaping. An LDAP user with delegated privileges to create or rename directory entries could craft a malicious DN containing shell metacharacters. When a Cockpit administrator subsequently views the entry in the 389 Console, the embedded shell command executes with root privileges on the directory server host.

CVE-2026-19843 is an OS command injection vulnerability in the Cockpit 389 Console LDAP editor of Red Hat Directory Server. The issue arises because the LDAP editor embeds an LDAP entry's distinguished name (DN) into a shell command without proper escaping. An LDAP user with delegated privileges can craft a malicious DN containing shell metacharacters, which executes with root privileges when viewed by a Cockpit administrator.