Linux Local Privilege Escalation via SUID /proc/pid/mem Write

Re:Linux Local Privilege Escalation via SUID /proc/pid/mem W... by pferde on Monday January 23, 2012 @04:13AM (#3499653)

Just tried it on 3.0.4 with grsecurity enabled, and it didn't work, so there.

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Re:Linux Local Privilege Escalation via SUID /proc/pid/mem W... by static_cast on Monday January 23, 2012 @04:18AM (#3499666)

Thanks. I guess It's finally time for me to move every machine to a grsecurity kernel.

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Re:Linux Local Privilege Escalation via SUID /proc/pid/mem W... by ColdAsIce on Monday January 23, 2012 @04:51AM (#3499743)

Would you be interested in a grsecurity distro?

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Re:Linux Local Privilege Escalation via SUID /proc/pid/mem W... by static_cast on Monday January 23, 2012 @05:20AM (#3499822)

I'd love to see up to date stable grsecurity kernel repositories for the major distributions (ubuntu, debian, rhel/centos) that provide patched versions of the distribution kernel. You can configure most of grsecurity via the sysctl interface. At the moment it is always a bit of hassle to patch & compile a kernel from hand even with the great debian/ubuntu kernel-package.

I don't think I'll use an extra distribution. But something like a hardened LAMP/LAPP stack for shared hosting out of the box in a distribution would be great (I think in terms of easy chrooting of users and php, secure permissions, etc.pp) However, I guess everyone has different needs and there is no one size that fits for all.

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Re:Linux Local Privilege Escalation via SUID /proc/pid/mem W... by asomiv on Monday January 23, 2012 @05:56AM (#3499903)

Why is grsecurity not merged upstream?

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Re:Linux Local Privilege Escalation via SUID /proc/pid/mem W... by static_cast on Monday January 23, 2012 @07:04AM (#3500057)

I don't know. I'm just on the end-user side. Just a guess from my (pretty limited) understanding of the issue: The grsecurity[1] patch includes PaX[2] that can break a lot of software. e.g. Java and X11 and there are sometimes other unwanted side effects as well. And I've found a blog post stating that the author does not want to maintain a upstream patch[3].

1: http://en.wikipedia.org/wiki/Grsecurity

2: http://en.wikipedia.org/wiki/PaX

3: http://www.corsac.net/?rub=blog&post=1535

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Re:Linux Local Privilege Escalation via SUID /proc/pid/mem W... by nwmcsween on Tuesday January 24, 2012 @01:20AM (#3503708)

Egos and the childish behaviour of half the kernel developers involved in Linux, this includes Spender and co at grsec

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