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From: Salvatore Bonaccorso <carnil@debian.org>
To: Debian Bug Tracking System <submit@bugs.debian.org>
Subject: 389-ds-base: CVE-2026-9064
Fowarded: https://github.com/389ds/389-ds-base/issues/7503
Message-ID: <177957009956.1422509.3663373729364843719.reportbug@eldamar.lan>
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Date: Sat, 23 May 2026 23:01:39 +0200
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Source: 389-ds-base
Version: 3.1.2+vendor1-2
Severity: grave
Tags: security upstream
Justification: user security hole
X-Debbugs-Cc: carnil@debian.org, Debian Security Team <team@security.debian.org>

Hi,

The following vulnerability was published for 389-ds-base.

CVE-2026-9064[0]:
| A flaw was found in 389-ds-base. The get_ldapmessage_controls_ext()
| function in the LDAP server does not enforce an upper bound on the
| number of controls per LDAP message. A remote, unauthenticated
| attacker can send a specially crafted LDAP request containing
| hundreds of thousands of minimal controls within the default maximum
| BER message size (2 MB), causing excessive CPU consumption and heap
| allocation on the server. Under concurrent exploitation, this leads
| to significant latency degradation, worker thread starvation, or
| out-of-memory termination, resulting in a denial of service.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2026-9064
    https://www.cve.org/CVERecord?id=CVE-2026-9064
[1] https://github.com/389ds/389-ds-base/issues/7503
[2] https://github.com/389ds/389-ds-base/commit/7e9647f5bb5c47602f4cdf0022cf6bd22872d3ef

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore
]