Description
A flaw was found in Dropbear. When running in multi-user mode and authenticating users, the dropbear ssh server does the socket forwardings requested by the remote client as root, only switching to the logged-in user upon spawning a shell or performing some operations like reading the user's files. With the recent ability of also using unix domain sockets as the forwarding destination any user able to log in via ssh can connect to any unix socket with the root's credentials, bypassing both file system restrictions and any SO_PEERCRED / SO_PASSCRED checks performed by the peer.
Problem types
Incorrect Privilege Assignment
Product status
2024.84 (custom) before 2025.88
Timeline
| 2025-12-08: | Reported to Red Hat. |
| 2025-12-16: | Made public. |
References
www.openwall.com/lists/oss-security/2025/12/16/4
www.openwall.com/lists/oss-security/2025/12/17/1
access.redhat.com/security/cve/CVE-2025-14282
bugzilla.redhat.com/show_bug.cgi?id=2420052 (RHBZ#2420052)
github.com/mkj/dropbear/pull/391
github.com/mkj/dropbear/pull/394
lists.ucc.gu.uwa.edu.au/...rmail/dropbear/2025q4/002390.html