Integer Overflow or Wraparound Affecting 389ds/389-ds-base package, versions [0,]
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-UNMANAGED-389DS389DSBASE-17660702
- published27 Jun 2026
- disclosed4 Jun 2026
- creditUnknown
Introduced: 4 Jun 2026
CVE-2026-11774 (opens in a new tab)How to fix?
There is no fixed version for 389ds/389-ds-base.
Overview
Affected versions of this package are vulnerable to Integer Overflow or Wraparound in the sasl_io_start_packet process. An attacker can cause a heap buffer overflow by sending a crafted SASL packet with a length prefix of 0xFFFFFFFC, which triggers an integer overflow and bypasses the intended size limit, potentially leading to remote code execution or denial of service. This is only exploitable if the attacker has a valid Kerberos ticket, enrolled host, or service account and can perform a SASL bind with integrity protection (SSF > 0).
Workaround
This vulnerability can be mitigated by restricting SASL mechanisms (disable DIGEST-MD5 if not required), firewalling LDAP ports (389/636) to trusted networks, monitoring for SASL-framed packets with length prefix 0xFFFFFFFC through 0xFFFFFFFF, and enabling audit logging (nsslapd-auditlog-logging-enabled: on). On RHEL 8, upgrading glibc reduces remote code execution exploitability but does not eliminate denial of service.