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CVE-2016-7191

CVE-2016-7191: Authentication Bypass in passport-azure-ad

8.1

CVSS Score
3.0

Basic Information

CVE ID
CVE-2016-7191
GHSA ID
GHSA-73jp-3c67-hjfv
EPSS Score
0.92877%
CWE
CWE-287
Published
7/26/2018
Updated
1/9/2023
KEV Status
No
Technology
TechnologyJavaScript

Technical Details

CVSS Vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Package NameEcosystemVulnerable VersionsFirst Patched Version
passport-azure-adnpm>= 1.0.0, < 1.4.61.4.6
passport-azure-adnpm= 2.0.02.0.1

Vulnerability Intelligence
Miggo AIMiggo AI

Miggo AIRoot Cause Analysis

The vulnerability stems from improper issuer validation in JWT processing. Both the validateIssuer configuration enforcement and the core verify() function were flawed: 1) The validateIssuer setting was not respected at the configuration level, and 2) The verification logic in the OIDC strategy's core function failed to implement issuer checks when this setting was enabled. This matches the described attack pattern where crafted tokens bypass authentication through improper issuer validation, and aligns with Microsoft's security notice about missing issuer validation when using common endpoints.

Vulnerable functions

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

WAF Protection Rules

WAF Rule

*****t** v*rsions o* `p*ssport-*zur*-**` *o not r**o*niz* t** `v*li**t*Issu*r` s*ttin*, w*i** *llows r*mot* *tt**k*rs to *yp*ss *ut**nti**tion vi* * *r**t** tok*n. ## R**omm*n**tion V*rsion *.x: Up**t* to v*rsion *.*.* or l*t*r. V*rsion *.x: Up**t

Reasoning

T** vuln*r**ility st*ms *rom improp*r issu*r v*li**tion in JWT pro**ssin*. *ot* t** `v*li**t*Issu*r` *on*i*ur*tion *n*or**m*nt *n* t** *or* `v*ri*y()` *un*tion w*r* *l*w**: *) T** `v*li**t*Issu*r` s*ttin* w*s not r*sp**t** *t t** *on*i*ur*tion l*v*l,