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Date: Fri, 12 Jun 2026 16:17:32 +0200
To: submit@bugs.debian.org
Subject: 389-ds-base: CVE-2026-11774
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From: =?UTF-8?Q?Moritz_M=C3=BChlenhoff?= <jmm@inutil.org>
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Source: 389-ds-base
X-Debbugs-CC: team@security.debian.org
Severity: grave
Tags: security

Hi,

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

CVE-2026-11774[0]:
| An integer overflow flaw was found in the SASL I/O layer of 389
| Directory Server (389-ds-base). In sasl_io_start_packet(), adding
| sizeof(uint32_t) to a crafted SASL packet length prefix of
| 0xFFFFFFFC causes unsigned wraparound to zero, bypassing the
| nsslapd-maxsasliosize limit and leading to a heap buffer overflow of
| up to approximately 2 megabytes of attacker-controlled data. After a
| successful SASL bind with integrity protection (SSF > 0), a remote
| attacker can cause a Denial of Service (DoS) or achieve Remote Code
| Execution (RCE). In FreeIPA and Red Hat Identity Management
| deployments, any domain user with a valid Kerberos ticket, enrolled
| host, or service account can trigger this vulnerability over the
| network. This flaw is independent of CVE-2025-14905, which patched
| schema.c only and did not modify sasl_io.c.

https://bugzilla.redhat.com/show_bug.cgi?id=2484916


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-2026-11774
    https://www.cve.org/CVERecord?id=CVE-2026-11774

Please adjust the affected versions in the BTS as needed.
]