CVE-2020-35518
MEDIUMCVSS 5.3/10EPSS 1.54%
Last modified
CVE-2020-35518 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. When binding against a DN during authentication, the reply from 389-ds-base will be different whether the DN exists or not. This can be used by an unauthenticated attacker to check the existence of an entry in the LDAP database.. EPSS estimates a 1.54% chance of exploitation in the next 30 days.
Description
When binding against a DN during authentication, the reply from 389-ds-base will be different whether the DN exists or not. This can be used by an unauthenticated attacker to check the existence of an entry in the LDAP database.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Redhat | 389 Directory Server | < 1.4.3.19 |
| Redhat | 389 Directory Server | >= 1.4.4.0, < 1.4.4.13 |
| Redhat | 389 Directory Server | >= 2.0.0, < 2.0.3 |
| Redhat | Directory Server | 11.0 |
| Redhat | Enterprise Linux | 7.0 |
| Redhat | Enterprise Linux | 8.0 |
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1905565Issue Tracking, Patch, Vendor Advisory
- https://github.com/389ds/389-ds-base/commit/b6aae4d8e7c8a6ddd21646f94fef1bf7f22c3f32Patch, Third Party Advisory
- https://github.com/389ds/389-ds-base/commit/cc0f69283abc082488824702dae485b8eae938bcPatch, Third Party Advisory
- https://github.com/389ds/389-ds-base/issues/4480Patch, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1905565Issue Tracking, Patch, Vendor Advisory
- https://github.com/389ds/389-ds-base/commit/b6aae4d8e7c8a6ddd21646f94fef1bf7f22c3f32Patch, Third Party Advisory
- https://github.com/389ds/389-ds-base/commit/cc0f69283abc082488824702dae485b8eae938bcPatch, Third Party Advisory
- https://github.com/389ds/389-ds-base/issues/4480Patch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-35518?
When binding against a DN during authentication, the reply from 389-ds-base will be different whether the DN exists or not. This can be used by an unauthenticated attacker to check the existence of an entry in the LDAP database.
How severe is CVE-2020-35518?
CVE-2020-35518 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 1.54% probability of exploitation in the next 30 days.
How do I fix CVE-2020-35518?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2020-35518?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST