CVE-2026-11789
MediumCVSS 4.9Exploitation Probability (EPSS)
Low risk20th percentile - higher than 20% of all known CVEs
Summary
A flaw was found in 389 Directory Server in the SMD5 password storage plugin. When processing a crafted password hash shorter than 16 bytes, an unsigned integer underflow occurs when computing salt length, causing a buffer over-read and crashing the LDAP server during authentication.
Risk Assessment
The risk involves an unauthenticated attacker being able to remotely crash the LDAP server, leading to disruption of directory services and potential loss of access to resources.
Recommendation
Update 389 Directory Server to the latest version containing the fix. Consider disabling the SMD5 plugin if not required.
Other vulnerabilities in 389 Directory Server
See all- CVE-2015-1854High
389 Directory Server before 1.3.3.10 allows attackers to bypass intended access restrictions and modify directory entries via a crafted ldapmodrdn call.
- CVE-2016-5416High
389 Directory Server in Red Hat Enterprise Linux 6 and 7 allows remote attackers to read the default Access Control Instructions.
- CVE-2016-4992High
The 389 Directory Server in Red Hat Enterprise Linux 6 and 7 allows remote attackers to infer the existence of RDN component objects.
- CVE-2016-0741High
In 389 Directory Server (formerly Fedora Directory Server) versions 1.3.4.x before 1.3.4.7, a vulnerability allows remote attackers to cause a denial of service through an abnormally closed connection, leading to an infinite loop and connection blocking.
- CVE-2015-3230High
389 Directory Server (formerly Fedora Directory Server) before version 1.3.3.12 does not enforce the nsSSL3Ciphers preference when creating an sslSocket, allowing remote attackers to use a disabled cipher.
- CVE-2016-5405Critical
The 389 Directory Server in Red Hat Enterprise Linux (Desktop, HPC Node, Server, Workstation) versions 6 and 7 allows remote attackers to obtain user passwords.
- CVE-2026-19404Medium
A flaw was found in 389 Directory Server. The CleanAllRUV and Abort CleanAllRUV replication-maintenance extended operations perform no authorization check, allowing an unauthenticated remote attacker to invoke them when nsslapd-allow-anonymous-access is enabled (the default), or any authenticated low-privilege user to invoke them otherwise. This allows removal of a replica ID from replication metadata, purging of changelog records, and interruption of administrator-initiated cleanup, which can leave replication inconsistent or unavailable.
- CVE-2026-18651Medium
389 Directory Server has a vulnerability in SASL PLAIN authentication. The server installs connection-level bind credentials before performing the account-lock check. If the account is locked, the bind is reported as failed, but the authenticated state on the connection is not reverted. A client with valid credentials for a locked account can continue to use the connection with that account's privileges.
- CVE-2026-15722High
A stack buffer overflow flaw was found in 389 Directory Server (389-ds-base) in the get_ruvelement_from_berval() function. A remote unauthenticated attacker can send a crafted StartNSDS50ReplicationRequest with a replica ID field containing more than 16 digit characters, causing a crash of the LDAP server.
- CVE-2026-11770High
A flaw was found in 389 Directory Server where an unauthenticated remote attacker can inject LDAP search filters into the CleanAllRUV operation. Because the query runs with elevated privileges, the attacker can extract sensitive server configuration metadata, including replication bind DNs and password storage scheme information.
Original NVD description (English source)
A flaw was found in 389 Directory Server. The SMD5 password storage plugin performs unsigned integer underflow when computing salt length from a crafted password hash shorter than 16 bytes, causing a buffer over-read that crashes the LDAP server during authentication.