FreeBSD : Dropbear -- two vulnerabilities (60931f98-55a7-11e7-8514-589cfc0654e1)
High Nessus Plugin ID 101217
SynopsisThe remote FreeBSD host is missing a security-related update.
DescriptionMatt 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.
SolutionUpdate the affected package.