Vulnerability · Published Feb 18, 2022 · Assigned by redhat
CVE-2021-4091
High 7.5
In plain English
A high-severity double free in 389-ds-base. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.0% (higher than 81% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)7.5High
Exploit odds (30 days)2.0%top 19.0% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | 389-ds-base | 1.4.3.23-14.module_el8.5.0+2628+c731dc97 | ALSA-2022:0889 |
| AlmaLinux:8 | 389-ds-base-devel | 1.4.3.23-14.module_el8.5.0+2628+c731dc97 | ALSA-2022:0889 |
| AlmaLinux:8 | 389-ds-base-legacy-tools | 1.4.3.23-14.module_el8.5.0+2628+c731dc97 | ALSA-2022:0889 |
| AlmaLinux:8 | 389-ds-base-libs | 1.4.3.23-14.module_el8.5.0+2628+c731dc97 | ALSA-2022:0889 |
| AlmaLinux:8 | 389-ds-base-snmp | 1.4.3.23-14.module_el8.5.0+2628+c731dc97 | ALSA-2022:0889 |
| AlmaLinux:8 | python3-lib389 | 1.4.3.23-14.module_el8.5.0+2628+c731dc97 | ALSA-2022:0889 |
| Debian:12 | 389-ds-base | 2.0.15-1 | DEBIAN-CVE-2021-4091 |
| Debian:13 | 389-ds-base | 2.0.15-1 | DEBIAN-CVE-2021-4091 |
| Rocky Linux:8 | 389-ds-base | 0:1.4.3.23-14.module+el8.5.0+745+c5be6847 | RLSA-2022:0889 |
| Ubuntu:22.04:LTS | 389-ds-base | no fix listed | UBUNTU-CVE-2021-4091 |
| Ubuntu:24.04:LTS | 389-ds-base | no fix listed | UBUNTU-CVE-2021-4091 |
| Ubuntu:25.10 | 389-ds-base | no fix listed | UBUNTU-CVE-2021-4091 |
| Ubuntu:26.04:LTS | 389-ds-base | no fix listed | UBUNTU-CVE-2021-4091 |
| Ubuntu:26.10 | 389-ds-base | no fix listed | UBUNTU-CVE-2021-4091 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| n/a | 389-ds-base | 389-ds-base-1.3.10.2 |
Weakness: CWE-415