On Thu, Apr 30, 2015 at 11:35 AM, Michael DePaulo <mikedep333@gmail.com> wrote:
Sent from my Android Smartphone
---------- Forwarded message ---------- From: "Andreas Schneider" <asn@cryptomilk.org> Date: Apr 30, 2015 10:33 AM Subject: libssh 0.6.5 has been released to address CVE-2015-3146 To: <libssh@libssh.org> Cc:
ibssh versions 0.5.1 and above have a logical error in the handling of a SSH_MSG_NEWKEYS and SSH_MSG_KEXDH_REPLY package. A detected error did not set the session into the error state correctly and further processed the packet which leads to a null pointer dereference. This is the packet after the initial key exchange and doesn’t require authentication.
This could be used for a Denial of Service (DoS) attack.
The bug was found and reported by Mariusz Ziulek from the Open Web Application Security Project (OWASP).
https://www.libssh.org/2015/04/30/libssh-0-6-5-security-and-bugfix-release/
-- Andreas Schneider GPG-ID: CC014E3D www.cryptomilk.org asn@cryptomilk.org
I asked on IRC (#libssh on FreeNode) if it affects the ssh client functionality. They said it affects both server and client.
I find a DoS attack on a client to be a bit odd, but I will update libssh anyway for X2Go Client for Windows 4.0.3.2-YYYYMMDD anyway.