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, 1 deletions

diff --git a/auth2-hostbased.c b/auth2-hostbased.c
index a344dcc1f..3a17f1bf2 100644
--- a/auth2-hostbased.c
+++ b/auth2-hostbased.c
@@ -150,7 +150,7 @@ hostbased_key_allowed(struct passwd *pw, const char *cuser, char *chost,
         int len;
         char *fp;
 
-        if (auth_key_is_revoked(key))
+        if (auth_key_is_revoked(key, 0))
                 return 0;
 
         resolvedname = get_canonical_hostname(options.use_dns);