Description
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.
Published: 2026-06-09
Score: 4.9 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

Vendor Workaround

Disable nsslapd-allow-hashed-passwords (default: off) to prevent non-DM users from setting pre-hashed passwords. Restrict Directory Manager credentials; limit DM access to management networks and audit DM operations via nsslapd-auditlog. Monitor for suspicious userPassword modifications. Migrate stored passwords from {SMD5} to {PBKDF2_SHA256} to eliminate the vulnerable code path for existing accounts.

Tracking

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Advisories

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History

Fri, 12 Jun 2026 18:45:00 +0000

Type Values Removed Values Added
First Time appeared Redhat 389 Directory Server
CPEs cpe:2.3:a:redhat:directory_server:11.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:directory_server:12.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:directory_server:13.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:389_directory_server:-:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
Vendors & Products Redhat 389 Directory Server

Tue, 09 Jun 2026 20:45:00 +0000

Type Values Removed Values Added
First Time appeared Redhat redhat Directory Server
Vendors & Products Redhat redhat Directory Server

Tue, 09 Jun 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 09 Jun 2026 13:30:00 +0000

Type Values Removed Values Added
Description 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.
Title 389-ds-base: 389-ds-base: smd5 password storage plugin salt length integer underflow crash
First Time appeared Redhat
Redhat directory Server
Redhat enterprise Linux
Weaknesses CWE-191
CPEs cpe:/a:redhat:directory_server:11
cpe:/a:redhat:directory_server:12
cpe:/a:redhat:directory_server:13
cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:6
cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat directory Server
Redhat enterprise Linux
References
Metrics cvssV3_1

{'score': 4.9, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H'}


Subscriptions

Redhat 389 Directory Server Directory Server Enterprise Linux Redhat Directory Server
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-06-09T16:16:07.367Z

Reserved: 2026-06-09T12:58:52.530Z

Link: CVE-2026-11789

cve-icon Vulnrichment

Updated: 2026-06-09T16:16:02.791Z

cve-icon NVD

Status : Analyzed

Published: 2026-06-09T14:16:37.070

Modified: 2026-06-12T18:30:21.810

Link: CVE-2026-11789

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-09T20:20:41Z

Weaknesses