CVE-2019-13565 — An issue was discovered in OpenLDAP 2

An issue was discovered in OpenLDAP 2.x before 2.4.48. When using SASL authentication and session encryption, and relying on the SASL security layers in slapd access controls, it is possible to obtain access that would otherwise be denied via a simple bind for any identity covere

01What is this vulnerability?

An issue was discovered in OpenLDAP 2.x before 2.4.48. When using SASL authentication and session encryption, and relying on the SASL security layers in slapd access controls, it is possible to obtain access that would otherwise be denied via a simple bind for any identity covered in those ACLs. After the first SASL bind is completed, the sasl_ssf value is retained for all new non-SASL…

02Affected products

No structured affected-product list available — see references below for vendor advisories.

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2019-07-26T13:15:12.720
• Last modified: 2026-10-14T07:16:46.353

09References

• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00053.html
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00058.html
• seclists.org — http://seclists.org/fulldisclosure/2019/Dec/26
• lists.apache.org — https://lists.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab…
• lists.apache.org — https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e3…
• lists.apache.org — https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8…
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2019/08/msg00024.html
• seclists.org — https://seclists.org/bugtraq/2019/Dec/23
• support.apple.com — https://support.apple.com/kb/HT210788
• support.f5.com — https://support.f5.com/csp/article/K98008862?utm_source=f5support&amp%3Butm_medi…