linux-kernel - Re: [PATCH] Check files' signatures before doing suid/sgid [2/4]

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Sat, 23 Jun 2007 20:01:29 +0200 (CEST)
From:	Jan Engelhardt <jengelh@...putergmbh.de>
To:	Alexander Wuerstlein <snalwuer@....informatik.uni-erlangen.de>
cc:	Arjan van de Ven <arjan@...radead.org>,
	linux-kernel@...r.kernel.org, arw@....name
Subject: Re: [PATCH] Check files' signatures before doing suid/sgid [2/4]


On Jun 21 2007 19:46, Alexander Wuerstlein wrote:
>
>If a process uses read() it needs some executable and writable memory. We do
>check for this in mprotect(). There is a problem with the i386-architecture,
>because it allows execution of any readable page (except with newer
>processors). But beyond that ugliness of i386, it should not be possible to
>execute anything without us noticing it (hopefully).

r and x together is not a problem IMHO.


	Jan
-- 
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/