# CVE-2019-13565: Auth bypass in n/a

> Attackers can bypass access controls in OpenLDAP by exploiting retained SASL security layer values, allowing unauthorized access to protected data.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 26 Jul 2019
- **Updated:** 14 Oct 2026
- **Also known as:** ALPINE-CVE-2019-13565, CLEANSTART-2026-ZY54094, DEBIAN-CVE-2019-13565, GHSA-49q9-mmpr-r526, UBUNTU-CVE-2019-13565

## What is CVE-2019-13565?

CVE-2019-13565 is a high-severity authentication bypass vulnerability in Apple Mac Os X, published on 26 Jul 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

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 connections. Depending on the ACL configuration, this can affect different types of operations (searches, modifications, etc.). In other words, a successful authorization step completed by one user affects the authorization requirement for a different user.

## Which versions are affected by CVE-2019-13565?

It affects 9 products.


Products: Apple Mac Os X, Canonical Ubuntu Linux, Debian Debian Linux, F5 Traffix Signaling Delivery Controller, Openldap Openldap, Opensuse Leap, Oracle Blockchain Platform, Oracle Solaris, Oracle Zfs Storage Appliance Kit.

## How do I fix CVE-2019-13565?

Upgrade to a fixed version.

## Is CVE-2019-13565 being exploited?

There is no known exploitation of CVE-2019-13565 in the wild and no public exploit code.

## Other vulnerabilities in Apple Mac Os X

- [CVE-2014-7169](https://insights.sbomify.com/CVE-2014-7169/): GNU Bourne-Again Shell (Bash) Arbitrary Code Execution (critical 9.8, exploited in the wild)
- [CVE-2014-6271](https://insights.sbomify.com/CVE-2014-6271/): GNU Bourne-Again Shell (Bash) Arbitrary Code Execution (critical 9.8, exploited in the wild)
- [CVE-2012-1823](https://insights.sbomify.com/CVE-2012-1823/): PHP-CGI Query String Parameter (critical 9.8, exploited in the wild)
- [CVE-2021-30713](https://insights.sbomify.com/CVE-2021-30713/): Apple macOS Unspecified (high 7.8, exploited in the wild)
- [CVE-2019-8526](https://insights.sbomify.com/CVE-2019-8526/): Apple macOS Use-After-Free (high 7.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-13565 and fix it if it is affected.

What it is: CVE-2019-13565 is a high-severity authentication bypass vulnerability in Apple Mac Os X, published on 26 Jul 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2019-13565 in the wild and no public exploit code.

Affected product: Apple Mac Os X. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2019-13565/ (Markdown: https://insights.sbomify.com/CVE-2019-13565/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-13565
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-13565
- OSV: https://osv.dev/vulnerability/CVE-2019-13565

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-13565/
Summaries are generated and may contain mistakes; the official description above is the record.