# CVE-2020-15719: Security feature bypass in n/a > Attackers can bypass certificate validation in OpenLDAP libraries when RFC6125 support is enabled, allowing man-in-the-middle attacks. - **Severity:** Medium 4.2 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N`) - **Exploited in the wild:** Not known - **Login needed:** Not needed - **Attackable:** Over the internet - **Victim action needed:** A user has to click or open something - **Fix available:** Yes - **Published:** 14 Jul 2020 - **Updated:** 4 Aug 2024 - **Also known as:** BIT-openldap-2020-15719, DEBIAN-CVE-2020-15719, ECHO-131f-3301-69b0, GHSA-pg7h-v386-fw8h, RHBA-2019:3674, ROOT-OS-DEBIAN-12-CVE-2020-15719, SUSE-SU-2020:2581-1, openSUSE-SU-2020:1416-1, openSUSE-SU-2020:1459-1 ## What is CVE-2020-15719? CVE-2020-15719 is a medium-severity vulnerability in Openldap Openldap, published on 14 Jul 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link. ### Official description libldap in certain third-party OpenLDAP packages has a certificate-validation flaw when the third-party package is asserting RFC6125 support. It considers CN even when there is a non-matching subjectAltName (SAN). This is fixed in, for example, openldap-2.4.46-10.el8 in Red Hat Enterprise Linux. Weakness: CWE-295 (Improper Certificate Validation) ## Which versions are affected by CVE-2020-15719? 1 open source package ship an affected version, including openldap. It affects 5 products. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `openldap` | Bitnami | All versions | 2.4.46-10.el8 | | `openldap` | Red Hat:enterprise_linux:8::baseos | All versions | 0:2.4.46-10.el8 | | `openldap-clients` | Red Hat:enterprise_linux:8::baseos | All versions | 0:2.4.46-10.el8 | | `openldap-clients-debuginfo` | Red Hat:enterprise_linux:8::baseos | All versions | 0:2.4.46-10.el8 | | `openldap-debuginfo` | Red Hat:enterprise_linux:8::baseos | All versions | 0:2.4.46-10.el8 | | `openldap-debugsource` | Red Hat:enterprise_linux:8::baseos | All versions | 0:2.4.46-10.el8 | | `openldap-devel` | Red Hat:enterprise_linux:8::baseos | All versions | 0:2.4.46-10.el8 | | `openldap-servers-debuginfo` | Red Hat:enterprise_linux:8::baseos | All versions | 0:2.4.46-10.el8 | | `openldap2` | SUSE:Linux Enterprise Module for Basesystem 15 SP1 | All versions | 2.4.46-9.34.1 | | `openldap2` | SUSE:Linux Enterprise Module for Basesystem 15 SP2 | All versions | 2.4.46-9.34.1 | | `openldap2` | SUSE:Linux Enterprise Module for Development Tools 15 SP1 | All versions | 2.4.46-9.34.1 | | `openldap2` | SUSE:Linux Enterprise Module for Development Tools 15 SP2 | All versions | 2.4.46-9.34.1 | | `openldap2` | SUSE:Linux Enterprise Module for Legacy 15 SP1 | All versions | 2.4.46-9.34.1 | | `openldap2` | SUSE:Linux Enterprise Module for Legacy 15 SP2 | All versions | 2.4.46-9.34.1 | | `openldap2` | openSUSE:Leap 15.1 | All versions | 2.4.46-lp151.10.15.1 | | `openldap2` | openSUSE:Leap 15.2 | All versions | 2.4.46-lp152.14.6.1 | Products: Mcafee Policy Auditor, Openldap Openldap, Opensuse Leap, Oracle Blockchain Platform, Redhat Enterprise Linux. ## How do I fix CVE-2020-15719? Upgrade openldap to 2.4.46-10.el8 or later. ## Is CVE-2020-15719 being exploited? There is no known exploitation of CVE-2020-15719 in the wild and no public exploit code. ## Other vulnerabilities in Openldap Openldap - [CVE-2017-17740](https://insights.sbomify.com/CVE-2017-17740/): Use after free in n/a (high 7.5) - [CVE-2021-31851](https://insights.sbomify.com/CVE-2021-31851/): Cross-Site Scripting vulnerability in Policy Auditor (medium 6.1) - [CVE-2021-31852](https://insights.sbomify.com/CVE-2021-31852/): Cross-Site Scripting vulnerability in Policy Auditor (medium 6.1) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2020-15719 and fix it if it is affected. What it is: CVE-2020-15719 is a medium-severity vulnerability in Openldap Openldap, published on 14 Jul 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link. Exploitation: There is no known exploitation of CVE-2020-15719 in the wild and no public exploit code. Affected packages and fixed versions: - openldap (Bitnami): affected all versions; fixed in 2.4.46-10.el8 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-2020-15719/ (Markdown: https://insights.sbomify.com/CVE-2020-15719/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2020-15719 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-15719 - OSV: https://osv.dev/vulnerability/CVE-2020-15719 --- From sbomify Insights: https://insights.sbomify.com/CVE-2020-15719/ Summaries are generated and may contain mistakes; the official description above is the record.