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389-ds-base CVE-2026-14969

| EUVDEUVD-2026-42052 MEDIUM
Generation of Predictable IV with CBC Mode (CWE-329)
2026-07-07 redhat GHSA-9458-4323-hx4r
Information Disclosure Red Hat Red Hat Enterprise Linux 10 Red Hat Enterprise Linux 6 Red Hat Enterprise Linux 7 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 9 Suse Red Hat Directory Server 11 Red Hat Directory Server 12 Red Hat Directory Server 13 Red Hat
4.4
CVSS 3.1 · NVD
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Severity by source

Vendor (redhat) PRIMARY
MEDIUM
qualitative
NVD
4.4 MEDIUM
AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
vuln.today AI
4.4 MEDIUM

Local filesystem access with high OS privileges required; no integrity or availability impact; confidentiality high given sensitivity of encrypted directory attributes.

3.1 AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
4.0 AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
SUSE
MEDIUM
qualitative
Red Hat
4.4 MEDIUM
qualitative

Primary rating from Vendor (redhat).

CVSS VectorNVD

Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

Lifecycle Timeline

1
Analysis Generated
Jul 07, 2026 - 16:20 vuln.today

DescriptionNVD

A flaw was found in 389-ds-base where the LDBM backend attribute encryption uses a hardcoded static initialization vector for AES-CBC and 3DES-CBC operations, allowing an attacker with privileged filesystem access to detect plaintext equality across encrypted entries by comparing ciphertext blocks.

AnalysisAI

Attribute encryption in the 389-ds-base LDBM backend exposes a cryptographic design flaw affecting Red Hat Directory Server 11, 12, and 13 across all supported RHEL releases (6 through 10). The LDBM backend applies a static, hardcoded initialization vector (IV) for both AES-CBC and 3DES-CBC encryption of directory attribute values, meaning that two entries storing identical plaintext for an encrypted attribute will always produce identical ciphertext blocks - a classic ciphertext equality oracle. An attacker with privileged filesystem-level read access to the LDBM database files can exploit this to determine whether any two encrypted attribute values are identical, leaking relational information about the directory without recovering plaintext. No public exploit code has been identified at time of analysis, and this CVE is not listed in the CISA KEV catalog.

Technical ContextAI

389-ds-base is the upstream community project for Red Hat Directory Server, an LDAP directory service packaged in RHEL. The LDBM (Lightweight Database Manager) backend is the local persistent storage layer for directory entries. When attribute-level encryption is configured, 389-ds-base is supposed to encrypt sensitive attribute values (e.g., userPassword-equivalent fields, personal identifiers) using AES-CBC or 3DES-CBC before writing them to disk. CBC (Cipher Block Chaining) mode is semantically secure only when each encryption operation uses a unique, unpredictable IV. CWE-329 (Not Using an Unpredictable IV with CBC Mode) captures exactly this failure: using a fixed/static IV eliminates the randomization that prevents ciphertext blocks from leaking information about plaintext relationships. The result is that AES-CBC or 3DES-CBC with a static IV degenerates into a deterministic cipher for the first block, making identical plaintexts always produce identical ciphertexts. Affected CPEs span cpe:2.3:a:red_hat:red_hat_directory_server_11 through _13 and cpe:2.3:a:red_hat:red_hat_enterprise_linux_6 through _10.

RemediationAI

No patched package version was explicitly identified in the provided input data; the Red Hat CVE advisory (https://access.redhat.com/security/cve/CVE-2026-14969) and Bugzilla entry (https://bugzilla.redhat.com/show_bug.cgi?id=2497735) should be monitored for errata releases targeting 389-ds-base on the affected RHEL releases. Until a patch is available, organizations that rely on LDBM attribute encryption for sensitive fields should consider the following compensating controls: restrict filesystem access to the LDBM database directory (typically /var/lib/dirsrv/slapd-<instance>/db/) using file ACLs to the directory server UID only, eliminating the ability of non-root users to perform offline ciphertext comparison; enforce SELinux in enforcing mode with the dirsrv policy active, which limits read access to LDBM files even for privileged system users; and audit root-level access to LDBM data directories via auditd rules on directory read/open syscalls. Note that restricting filesystem permissions does not eliminate risk for accounts with legitimate root access. Rotating encrypted attribute values after a patch is applied may be advisable if the directory has been exposed to unauthorized root-level access, since pre-existing ciphertexts encrypted under the static IV will remain comparably vulnerable.

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Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
SUSE Linux Enterprise High Performance Computing 15 SP7 Affected
SUSE Linux Enterprise Module for Server Applications 15 SP7 Affected
SUSE Linux Enterprise Server 15 SP7 Affected
SUSE Linux Enterprise Server 16.0 Affected
SUSE Linux Enterprise Server 16.1 Affected

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CVE-2026-14969 vulnerability details – vuln.today
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