| Field | Details |
|---|---|
| Vulnerability Name & Analysis | 0‑Click Account Takeover via Predictable Token Generation in Zendesk’s Android SDK. Flaw allows mass takeover of Zendesk accounts without any user interaction by generating predictable JWT tokens. (Cyber Security News) |
| CVE ID | (Not yet assigned) |
| Root Cause (CWE) | Use of static hardcoded secret combined with sequential account IDs → allows predictable JWT tokens: <AccountID>_<SHA1-hash> of REDACTED-{AccountID}-{HardcodedSecret}. (Cyber Security News) |
| Attack Vector | Zero-click: no user interaction required. Exploitable by enumerating tokens and calling Zendesk’s /access/sdk/jwt endpoint without rate limiting. (Cyber Security News) |
| Impact | Full access to all Zendesk tickets across organizations: read PII, internal communications, impersonate support agents, exfiltrate data. (Cyber Security News) |
| Remediation | Implement robust fixes: use unique, high-entropy secrets; enforce rate limits; audit mobile authentication flows. Zendesk Android SDK must be updated ASAP. (Cyber Security News) |
Executive Summary (CyberDudeBivash Highlight)
Zero-Click Zendesk Token Hijack
A critical flaw in Zendesk’s Android SDK allows attackers to mass-generate predictable JWT tokens by combining static secrets with sequential account IDs — no user interaction needed. This lets attackers gain full control over support tickets across affected organizations, accessing sensitive data and internal systems.
Why It Matters
Zendesk powers support workflows for enterprises worldwide. When authentication mechanisms are predictable, attackers gain unfettered access — turning support portals into a direct pipeline for espionage, data theft, and impersonation.
Recommended Action Plan
- Patch Immediately: Zendesk must urgently update the Android SDK with proper token entropy.
- Audit Authentication Flows: Eliminate static/shared secrets; enforce rate-limiting and logging on token endpoints.
- Monitor & Mitigate: Check for anomalous JWT calls. Rotate secret keys and monitor for brute-force token generation.
- Notify Stakeholders: Organizations using Zendesk mobile SDK should be informed and mitigated proactively.
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