Re: Qualys Security Advisory - Roaming through the OpenSSH client: CVE-2016-0777 and CVE-2016-0778

[Florian Weimer <fweimer () redhat com>]

On 01/14/2016 06:13 PM, Qualys Security Advisory wrote:
> Internal stdio buffering is the most severe of the three problems
> discussed in this section, although GNU/Linux is not affected because
> the glibc mmap()s and munmap()s (and therefore cleanses) stdio buffers.

This will change in glibc 2.23, stdio will use regular malloc and free
for its buffers.  I did not expect this change to have security
implications.  Considering that the actual bug lies elsewhere, and stdio
usage is based on copying out of the buffer (so leaks can still happen
elsewhere), I do not wish to revert this change.

Florian