iMesh Breach Exposes 49.4 M Accounts Including Emails, IPs, and Password Hashes
What Happened – In September 2013 the iMesh file‑sharing service was compromised, resulting in the exposure of roughly 49.5 million user records. The data—email addresses, IP addresses, usernames and salted MD5 password hashes—appeared for sale on a dark‑web marketplace in mid‑2016.
Why It Matters for Trust & Control Assurance
- Highlights the risk of weak credential storage (MD5) and the need for strong hashing algorithms as a core control objective.
- Demonstrates why continuous monitoring for credential leakage is essential to maintain a defensible audit trail.
- Shows that evidence of proper password‑management policies is a key piece of any control‑assurance program.
Who Is Affected – Online file‑sharing platforms, consumer‑facing web services, and any organization that stores user credentials.
Recommended Actions
- Review and upgrade password‑hashing mechanisms (e.g., migrate to bcrypt, Argon2).
- Implement credential‑leak detection and continuous monitoring of dark‑web sources.
- Document hashing standards and evidence of compliance for audit readiness.
Source: Have I Been Pwned – iMesh breach
Technical Notes
- Attack vector: unauthorized server access leading to bulk data exfiltration.
- Vulnerable storage: salted MD5 hashes (cryptographically weak).
- Exposed data types: email addresses, IP addresses, usernames, password hashes.
Source: same as above