From: random832@fastmail.com (Random832)
Subject: [TUHS] Old Unix vulnerabilities
Date: Sun, 14 May 2017 01:52:30 -0400 [thread overview]
Message-ID: <1494741150.709655.975854064.7B3C6781@webmail.messagingengine.com> (raw)
In-Reply-To: <alpine.BSF.2.20.1705140929150.67621@aneurin.horsfall.org>
On Sat, May 13, 2017, at 19:34, Dave Horsfall wrote:
> OK, I'll kick it off.
>
> A beauty in V6 (and possibly V7) was discovered by the kiddies in Elec
> Eng; by sending a signal with an appropriately-crafted negative value (as
> determined from inspecting <user.h>) you could overwrite u.u_uid with
> zero... Needless to say I scrambled to fix that one on my 11/40 network!
V7 fixes it by changing the if(sig >= NSIG) in psignal to cast it to
unsigned. Kill still doesn't validate its parameter until SysIII and
4BSD. PWB1 does not have the fix.
next prev parent reply other threads:[~2017-05-14 5:52 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-13 23:34 Dave Horsfall
2017-05-14 5:52 ` Random832 [this message]
2017-05-15 9:46 ` Tony Finch
2017-05-14 6:11 ` Random832
2017-05-18 17:32 ` Tim Newsham
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