Reject vulnerable keys to mitigate Debian OpenSSL flaw

In 2008, Debian (and derived distributions such as Ubuntu) shipped an
OpenSSL package with a flawed random number generator, causing OpenSSH to
generate only a very limited set of keys which were subject to private half
precomputation.  To mitigate this, this patch checks key authentications
against a blacklist of known-vulnerable keys, and adds a new ssh-vulnkey
program which can be used to explicitly check keys against that blacklist.
See CVE-2008-0166.

Bug: https://bugzilla.mindrot.org/show_bug.cgi?id=1469
Last-Update: 2013-09-14

Patch-Name: ssh-vulnkey.patch

1 files changed, 1 insertions, 0 deletions

diff --git a/sshd.8 b/sshd.8
index b0c7ab6bd..a604429b7 100644
--- a/sshd.8
+++ b/sshd.8
@@ -954,6 +954,7 @@ The content of this file is not sensitive; it can be world-readable.
 .Xr ssh-agent 1 ,
 .Xr ssh-keygen 1 ,
 .Xr ssh-keyscan 1 ,
+.Xr ssh-vulnkey 1 ,
 .Xr chroot 2 ,
 .Xr hosts_access 5 ,
 .Xr login.conf 5 ,