What’s Vulnerable › Vulnerabilities
CVE-2021-4091
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 2.0% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2022-02-18 · updated 2026-06-17
- Weakness: CWE-415
Description
A double-free was found in the way 389-ds-base handles virtual attributes context in persistent searches. An attacker could send a series of search requests, forcing the server to behave unexpectedly, and crash.
Affected products
- Port389 389-Ds-Base: before 1.3.10.2 — fixed in 1.3.10.2
- RedHat Enterprise Linux Desktop: 7
- RedHat Enterprise Linux For Ibm Z Systems: 7.0
- RedHat Enterprise Linux For Power Big Endian: 7.0
- RedHat Enterprise Linux For Power Little Endian: 7.0
- RedHat Enterprise Linux For Scientific Computing: 7.0
- RedHat Enterprise Linux Server: 7.0
- RedHat Enterprise Linux Workstation: 7.0
How to fix
Upgrade to a fixed version: Port389 389-Ds-Base 1.3.10.2. Check the vendor advisory for mitigations.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2030307
- https://lists.debian.org/debian-lts-announce/2023/04/msg00026.html
- https://bugzilla.redhat.com/show_bug.cgi?id=2030307
- https://lists.debian.org/debian-lts-announce/2023/04/msg00026.html
- https://lists.debian.org/debian-lts-announce/2025/01/msg00015.html
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