Decades-Old BMC Vulnerability Exposes Thousands of Data Centers to Attacks
Vulnerability: A 22-year-old BMC vulnerability allows attackers to crack passwords offline, exposing thousands of data centers.
Deep Analysis and Expert Commentary
The vulnerability in BMCs stems from a design flaw in the IPMI 2.0 authentication protocol, introduced in 2004. Attackers can exploit CVE-2013-4786 to extract HMAC-SHA1 hashes from RAKP message 2 responses, enabling offline password cracking. This bypasses the need for repeated login attempts, making it efficient for compromising weak, reused, or default passwords. The exposure is widespread, with 37,000 internet-exposed interfaces and 24,000 leaking hashes. Additionally, 6,240 hosts accept empty usernames with weak passwords, and 2,340 use common credentials like 'Admin' or 'root'. Mitigations include disabling IPMI on public interfaces, enforcing strong passwords, and monitoring BMC access logs for unusual activity. Organizations should also segment management networks to limit exposure.
Action Items
- Disable IPMI on internet-exposed interfaces.
- Enforce strong, unique passwords for BMC accounts.
- Monitor BMC access logs for suspicious activity.
Original Article Brief Intro
SecurityWeek · 2026-08-04 · Vulnerability: A 22-year-old BMC vulnerability allows attackers to crack passwords offline, exposing thousands of data centers.
Related Terms and Notes
CVE IDs
- CVE-2013-4786
Malware Families
- IPMI — Intelligent Platform Management Interface, a protocol for managing and monitoring servers independently of the operating system.
Context Notes
- BMC — Baseboard Management Controller, a specialized microcontroller embedded in servers for out-of-band management.
- BMC Vulnerability
- Data Center Security
- IPMI
- IPMI 2.0
- Offline Password Cracking