FreeBSD VuXML: Documenting security issues in FreeBSD and the FreeBSD Ports Collection

Dropbear -- two vulnerabilities

Affected packages
dropbear < 2017.75


VuXML ID 60931f98-55a7-11e7-8514-589cfc0654e1
Discovery 2017-05-18
Entry 2017-07-03

Matt Johnston reports:

Fix double-free in server TCP listener cleanup A double-free in the server could be triggered by an authenticated user if dropbear is running with -a (Allow connections to forwarded ports from any host) This could potentially allow arbitrary code execution as root by an authenticated user.

Fix information disclosure with ~/.ssh/authorized_keys symlink. Dropbear parsed authorized_keys as root, even if it were a symlink. The fix is to switch to user permissions when opening authorized_keys.


CVE Name CVE-2017-9078
CVE Name CVE-2017-9079