CVE-2024-21662

Argo CD vulnerable to Bypassing of Rate Limit and Brute Force Protection Using Cache Overflow

Published Mar 18, 2024 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Description
Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. Prior to versions 2.8.13, 2.9.9, and 2.10.4, an attacker can effectively bypass the rate limit and brute force protections by exploiting the application's weak cache-based mechanism. This loophole in security can be combined with other vulnerabilities to attack the default admin account. This flaw undermines a patch for CVE-2020-8827 intended to protect against brute-force attacks. The application's brute force protection relies on a cache mechanism that tracks login attempts for each user. This cache is limited to a `defaultMaxCacheSize` of 1000 entries. An attacker can overflow this cache by bombarding it with login attempts for different users, thereby pushing out the admin account's failed attempts and effectively resetting the rate limit for that account. This is a severe vulnerability that enables attackers to perform brute force attacks at an accelerated rate, especially targeting the default admin account. Users should upgrade to version 2.8.13, 2.9.9, or 2.10.4 to receive a patch.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2024-0792 Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. Prior to versions 2.8.13, 2.9.9, and 2.10.4, an attacker can effectively bypass the rate limit and brute force protections by exploiting the application's weak cache-based mechanism. This loophole in security can be combined with other vulnerabilities to attack the default admin account. This flaw undermines a patch for CVE-2020-8827 intended to protect against brute-force attacks. The application's brute force protection relies on a cache mechanism that tracks login attempts for each user. This cache is limited to a `defaultMaxCacheSize` of 1000 entries. An attacker can overflow this cache by bombarding it with login attempts for different users, thereby pushing out the admin account's failed attempts and effectively resetting the rate limit for that account. This is a severe vulnerability that enables attackers to perform brute force attacks at an accelerated rate, especially targeting the default admin account. Users should upgrade to version 2.8.13, 2.9.9, or 2.10.4 to receive a patch.
Github GHSA Github GHSA GHSA-2vgg-9h6w-m454 Bypassing Rate Limit and Brute Force Protection Using Cache Overflow
History
Type Values Removed Values Added
First Time appeared Argoproj
Argoproj argo Cd
CPEs cpe:2.3:a:argoproj:argo_cd:*:*:*:*:*:*:*:*
Vendors & Products Argoproj
Argoproj argo Cd
Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Aug 1, 2024, 10:27 PM
Reserved
Dec 29, 2023, 4:10 PM
Status
Analyzed
Published
Mar 18, 2024, 7:15 PM
Modified
Jun 17, 2026, 7:09 AM
Severity
Moderate
Public date
Mar 18, 2024, 12:00 AM