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Message-ID: <20171031135005.GA12455@openwall.com>
Date: Tue, 31 Oct 2017 14:50:05 +0100
From: Solar Designer <solar@...nwall.com>
To: oss-security@...ts.openwall.com
Subject: Re: Fw: Security risk of vim swap files
On Tue, Oct 31, 2017 at 02:35:59PM +0100, Jakub Wilk wrote:
> There's another problem with vim swapfiles.
>
> If you edit a file directly in /tmp, vim will happily read a swapfile
> that were planted there by somebody else. Local users could exploit this
> for denial of service (or maybe worse if there are any swapfile parsing
> bugs...).
>
> Is that a bug in vim? Or is it a user error to edit file directly in
> /tmp?
Almost all manual uses of /tmp are user errors, yet we could want to
harden programs to make such misuses less risky.
> In the latter case, we should fix at least vipe(1) and vidir(1) from
> moreutils; and run-mailcap(1).
Alexander
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