CVE-2020-35518 Information disclosure in 389-ds-base
Medium 5.3
Published
Updated
Check this codebase for CVE-2020-35518 and fix it if it is affected.
What it is: CVE-2020-35518 is a medium-severity vulnerability in Redhat Enterprise Linux, published on 26 Mar 2021. 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-2020-35518 in the wild and no public exploit code.
Affected product: Redhat Enterprise Linux. 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-2020-35518/ (Markdown: https://insights.sbomify.com/CVE-2020-35518/index.md)
An unauthenticated attacker can determine if specific LDAP entries exist by observing differences in authentication replies.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-35518?
CVE-2020-35518 is a medium-severity vulnerability in Redhat Enterprise Linux, published on 26 Mar 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Which versions are affected by CVE-2020-35518?
It affects 3 products.
Linux distribution packages (40)
389-ds-base Red Hat:directory_server:11.1::el8 | All versions | 0:1.4.2.12-5.module+el8dsrv+9896+eb95346c |
389-ds-base-debuginfo Red Hat:directory_server:11.1::el8 | All versions | 0:1.4.2.12-5.module+el8dsrv+9896+eb95346c |
389-ds-base-debugsource Red Hat:directory_server:11.1::el8 | All versions | 0:1.4.2.12-5.module+el8dsrv+9896+eb95346c |
389-ds-base-devel Red Hat:directory_server:11.1::el8 | All versions | 0:1.4.2.12-5.module+el8dsrv+9896+eb95346c |
389-ds-base-legacy-tools Red Hat:directory_server:11.1::el8 | All versions | 0:1.4.2.12-5.module+el8dsrv+9896+eb95346c |
389-ds-base-legacy-tools-debuginfo Red Hat:directory_server:11.1::el8 | All versions | 0:1.4.2.12-5.module+el8dsrv+9896+eb95346c |
389-ds-base-libs Red Hat:directory_server:11.1::el8 | All versions | 0:1.4.2.12-5.module+el8dsrv+9896+eb95346c |
389-ds-base-libs-debuginfo Red Hat:directory_server:11.1::el8 | All versions | 0:1.4.2.12-5.module+el8dsrv+9896+eb95346c |
389-ds-base-snmp Red Hat:directory_server:11.1::el8 | All versions | 0:1.4.2.12-5.module+el8dsrv+9896+eb95346c |
389-ds-base-snmp-debuginfo Red Hat:directory_server:11.1::el8 | All versions | 0:1.4.2.12-5.module+el8dsrv+9896+eb95346c |
cockpit-389-ds Red Hat:directory_server:11.1::el8 | All versions | 0:1.4.2.12-5.module+el8dsrv+9896+eb95346c |
python3-lib389 Red Hat:directory_server:11.1::el8 | All versions | 0:1.4.2.12-5.module+el8dsrv+9896+eb95346c |
389-ds-base Red Hat:directory_server:11.2::el8 | All versions | 0:1.4.3.21-3.module+el8dsrv+10401+3d549418 |
389-ds-base-debuginfo Red Hat:directory_server:11.2::el8 | All versions | 0:1.4.3.21-3.module+el8dsrv+10401+3d549418 |
389-ds-base-debugsource Red Hat:directory_server:11.2::el8 | All versions | 0:1.4.3.21-3.module+el8dsrv+10401+3d549418 |
389-ds-base-devel Red Hat:directory_server:11.2::el8 | All versions | 0:1.4.3.21-3.module+el8dsrv+10401+3d549418 |
389-ds-base-legacy-tools Red Hat:directory_server:11.2::el8 | All versions | 0:1.4.3.21-3.module+el8dsrv+10401+3d549418 |
389-ds-base-legacy-tools-debuginfo Red Hat:directory_server:11.2::el8 | All versions | 0:1.4.3.21-3.module+el8dsrv+10401+3d549418 |
389-ds-base-libs Red Hat:directory_server:11.2::el8 | All versions | 0:1.4.3.21-3.module+el8dsrv+10401+3d549418 |
389-ds-base-libs-debuginfo Red Hat:directory_server:11.2::el8 | All versions | 0:1.4.3.21-3.module+el8dsrv+10401+3d549418 |
389-ds-base-snmp Red Hat:directory_server:11.2::el8 | All versions | 0:1.4.3.21-3.module+el8dsrv+10401+3d549418 |
389-ds-base-snmp-debuginfo Red Hat:directory_server:11.2::el8 | All versions | 0:1.4.3.21-3.module+el8dsrv+10401+3d549418 |
cockpit-389-ds Red Hat:directory_server:11.2::el8 | All versions | 0:1.4.3.21-3.module+el8dsrv+10401+3d549418 |
python3-lib389 Red Hat:directory_server:11.2::el8 | All versions | 0:1.4.3.21-3.module+el8dsrv+10401+3d549418 |
389-ds-base Red Hat:enterprise_linux:7::client | All versions | 0:1.3.10.2-12.el7_9 |
389-ds-base-debuginfo Red Hat:enterprise_linux:7::client | All versions | 0:1.3.10.2-12.el7_9 |
389-ds-base-devel Red Hat:enterprise_linux:7::client | All versions | 0:1.3.10.2-12.el7_9 |
389-ds-base-libs Red Hat:enterprise_linux:7::client | All versions | 0:1.3.10.2-12.el7_9 |
389-ds-base-snmp Red Hat:enterprise_linux:7::client | All versions | 0:1.3.10.2-12.el7_9 |
389-ds-base Red Hat:enterprise_linux:7::computenode | All versions | 0:1.3.10.2-12.el7_9 |
389-ds-base-debuginfo Red Hat:enterprise_linux:7::computenode | All versions | 0:1.3.10.2-12.el7_9 |
389-ds-base-devel Red Hat:enterprise_linux:7::computenode | All versions | 0:1.3.10.2-12.el7_9 |
389-ds-base-libs Red Hat:enterprise_linux:7::computenode | All versions | 0:1.3.10.2-12.el7_9 |
389-ds-base-snmp Red Hat:enterprise_linux:7::computenode | All versions | 0:1.3.10.2-12.el7_9 |
389-ds-base Red Hat:enterprise_linux:7::server | All versions | 0:1.3.10.2-12.el7_9 |
389-ds-base-debuginfo Red Hat:enterprise_linux:7::server | All versions | 0:1.3.10.2-12.el7_9 |
389-ds-base-devel Red Hat:enterprise_linux:7::server | All versions | 0:1.3.10.2-12.el7_9 |
389-ds-base-libs Red Hat:enterprise_linux:7::server | All versions | 0:1.3.10.2-12.el7_9 |
389-ds-base-snmp Red Hat:enterprise_linux:7::server | All versions | 0:1.3.10.2-12.el7_9 |
389-ds-base Red Hat:enterprise_linux:7::workstation | All versions | 0:1.3.10.2-12.el7_9 |
Products include Redhat 389 Directory Server, Redhat Directory Server, Redhat Enterprise Linux.
How do I fix CVE-2020-35518?
Apply the vendor's patch.
Is CVE-2020-35518 being exploited?
There is no known exploitation of CVE-2020-35518 in the wild and no public exploit code.
Other vulnerabilities in Redhat Enterprise Linux
- CVE-2026-11770 389-ds-base: 389-ds-base: pre-auth ldap filter injection in cleanallruv status check
- CVE-2026-15722 Memory corruption in Red Hat Directory Server 11.5 E4S for RHEL 8
- CVE-2026-9064 Denial of service in Red Hat Directory Server 11.5 E4S for RHEL 8
- CVE-2010-2222 Null dereference in Red Hat Directory Server
- CVE-2026-11611 389-ds-base: 389-ds-base: content sync plugin unbounded queue growth and race conditions
Sources
Also known as DEBIAN-CVE-2020-35518, GHSA-vg4h-9m5m-rchq, OESA-2022-1602, OESA-2022-2056, RHSA-2021:0599, RHSA-2021:1086 and 6 more.