Vulnerability in MariaDB (CVE-2021-27928)

Summary

Vulnerability in MariaDB (CVE-2021-27928). Successful exploitation can lead to full system takeover.

Original description

The description as published by the source.

A remote code execution issue was discovered in MariaDB 10.2 before 10.2.37, 10.3 before 10.3.28, 10.4 before 10.4.18, and 10.5 before 10.5.9; Percona Server through 2021-03-03; and the wsrep patch through 2021-03-03 for MySQL. An untrusted search path leads to eval injection, in which a database SUPER user can execute OS commands after modifying wsrep_provider and wsrep_notify_cmd. NOTE: this does not affect an Oracle product.

Source: OSV.dev (Open Source Vulnerabilities) NVD OSV

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as CVE-2021-27928 has been found in MariaDB.
Successful exploitation can lead to full system takeover.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "MariaDB CVE-2021-27928" on the vendor's site.

CVE-2021-27928 (MariaDB)
Attack vector: remote (network-reachable) / no user interaction
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.

❓ What is the problem

A vulnerability (unclassified) exists in MariaDB.

📍 Affected scope

Check the vendor advisory for the affected versions of MariaDB.

🔥 Severity

Severity: ?. Successful exploitation can lead to full system takeover.

🔧 How to fix

Update to the patched release per vendor advisory.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'MariaDB' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

1
Identify exposure identify
```
grep -r 'MariaDB' . | grep -v node_modules
```
リポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で MariaDB を grep し、稼働しているサービス・バージョンを把握する。
2
Post-deployment verification verify
```
Confirm patched version is live in production
```
パッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

Affected packages

Bitnami mariadb-min

[{"type":"SEMVER","events":[{"introduced":"10.2.0"},{"fixed":"10.2.37"},{"introduced":"10.3.0"},{"fixed":"10.3.28"},{"introduced":"10.4.0"},{"fixed":"10.4.18"},{"introduced":"10.5.0"},{"fixed":"10.5.9"}]}]

Bitnami mysql-client

[{"type":"SEMVER","events":[{"introduced":"10.2.0"},{"fixed":"10.2.37"},{"introduced":"10.3.0"},{"fixed":"10.3.28"},{"introduced":"10.4.0"},{"fixed":"10.4.18"},{"introduced":"10.5.0"},{"fixed":"10.5.9"}]}]

Bitnami mariadb

[{"type":"SEMVER","events":[{"introduced":"10.2.0"},{"fixed":"10.2.37"},{"introduced":"10.3.0"},{"fixed":"10.3.28"},{"introduced":"10.4.0"},{"fixed":"10.4.18"},{"introduced":"10.5.0"},{"fixed":"10.5.9"}]}]

Fix status by distribution

Fixed packages published by each distribution for this CVE

Alpine Linux ALPINE-CVE-2021-27928 mariadb Fixed in: 10.3.28-r0
Debian DEBIAN-CVE-2021-27928 mariadb-10.5 Fixed in: 1:10.5.9-1

References

advisory lists.debian.org
advisory mariadb.com
advisory mariadb.com
advisory mariadb.com
advisory mariadb.com
advisory mariadb.com
advisory security.gentoo.org
advisory jira.mariadb.org
advisory packetstormsecurity.com
web nvd.nist.gov