Argo CD vulnerable to Bypassing of Rate Limit and Brute Force Protection Using Cache Overflow
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 2.8.13, 2.9.9, 2.10.4
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: poc
- Automatable: yes
- Technical impact: partial
Summary
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.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: poc · Automatable: yes · Technical impact: partial
- Record last updated
Affected versions
- argoproj argo-cd
fixed in 2.8.13; From 2.9.0 · fixed in 2.9.9; From 2.10.0 · fixed in 2.10.4
- github.com/argoproj/argo-cd/v2Go
fixed in 2.8.13
- github.com/argoproj/argo-cd/v2Go
From 2.9.0 · fixed in 2.9.9
- github.com/argoproj/argo-cd/v2Go
From 2.10.0 · fixed in 2.10.4
- github.com/argoproj/argo-cd/v2Go
fixed in 2.8.13; From 2.9.0 · fixed in 2.9.9; From 2.10.0 · fixed in 2.10.4