CVE-2012-0920: Debian Linux

High severity, CVSS 7.1. EPSS: 6.4% chance of exploitation in the next 30 days.

Use-after-free vulnerability in Dropbear SSH Server 0.52 through 2012.54, when command restriction and public key authentication are enabled, allows remote authenticated users to execute arbitrary code and bypass command restrictions via multiple crafted command requests, related to "channels concurrency."

Affected products

• Debian Debian Linux: version 6.0 only; version 7.0 only
• Dropbear SSH Project Dropbear SSH: from 0.52, up to and including 2012.54

Published 2012-06-05. Last modified 2026-06-16.