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CVE-2020-8827

CVE-2020-8827: Improper Restriction of Excessive Authentication Attempts in Argo API

7.5

CVSS Score
3.1

Basic Information

CVE ID
CVE-2020-8827
GHSA ID
GHSA-xcqr-9h24-vrgw
EPSS Score
0.71414%
CWE
CWE-307
Published
7/26/2021
Updated
8/7/2024
KEV Status
No
Technology
TechnologyGo

Technical Details

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Package NameEcosystemVulnerable VersionsFirst Patched Version
github.com/argoproj/argo-cdgo< 1.5.11.5.1

Vulnerability Intelligence
Miggo AIMiggo AI

Miggo AIRoot Cause Analysis

The vulnerability stems from missing anti-brute-force mechanisms in authentication handling. The VerifyUsernamePassword function in sessionmanager.go was identified as vulnerable because:

  1. Pre-patch commit diffs show this was the core authentication validation point
  2. The CVE description explicitly mentions missing rate limiting in authentication flows
  3. The fix in PR #3404 adds Redis-backed failure tracking and delay logic to this exact function
  4. The original implementation returned immediate responses without tracking attempt history
  5. This matches the CWE-307 pattern of missing authentication attempt restrictions

Vulnerable functions

Only Mi**o us*rs **n s** t*is s**tion

WAF Protection Rules

WAF Rule

*s o* v*.*.*, t** *r*o *PI *o*s not impl*m*nt *nti-*utom*tion m**sur*s su** *s r*t* limitin*, ***ount lo*kouts, or ot**r *nti-*rut**or** m**sur*s. *tt**k*rs **n su*mit *n unlimit** num**r o* *ut**nti**tion *tt*mpts wit*out *ons*qu*n**. ### Sp**i*i*

Reasoning

T** vuln*r**ility st*ms *rom missin* *nti-*rut*-*or** m****nisms in *ut**nti**tion **n*lin*. T** V*ri*yUs*rn*m*P*sswor* *un*tion in s*ssionm*n***r.*o w*s i**nti*i** *s vuln*r**l* ****us*: *. Pr*-p*t** *ommit *i**s s*ow t*is w*s t** *or* *ut**nti**tio