Openwall GNU/*/Linux - a small security-enhanced Linux distro for servers
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Thu, 22 Mar 2018 13:09:29 +0100
From: zugtprgfwprz@...rnkuller.de
To: oss-security@...ts.openwall.com
Subject: Re: OpenSSL: bug in modular exponentiation

Hi Guido,

On 20.03.2018 22:34, Guido Vranken wrote:
> My bignum fuzzer (https://github.com/guidovranken/bignum-fuzzer)
> running on Google's oss-fuzz recently found a bug in affecting
> constant-time modular exponentiation.

Interesting -- could you confirm that the effect of this bug is a
miscalculation? Or is it breaking the constant-time assertion?

> OpenSSL does not treat this as a security vulnerability. This is a
> heads-up to developers who rely on the affected code so they can
> review the impact on their applications on a case-by-case basis.

Do you have a pointer as to where this was discussed? Do you consider it
a security vulnerability? Can you give advice to developers of how to
mitigate this kind of issue?

Is it regarded a WONTFIX by OpenSSL or is it going to be fixed (just not
treated as security-criticial)? If so, do you know the fix version?

Cheers and best regards,
Johannes

Powered by blists - more mailing lists

Your e-mail address:

Please check out the Open Source Software Security Wiki, which is counterpart to this mailing list.

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.