On Fri, 14 Aug 2009, Urs Beyerle wrote:
I guess SL is affected like most other Linux distributions.
I'm not 100% sure, but setting vm.mmap_min_addr to a value above 0
should prevent an exploit.
# sysctl vm.mmap_min_addr=4096
The default on my SL53 machines appears to be 65536
so there may be no need to do this.
And Stephan Wiesand <[email protected]> replied:
I successfully rooted a 32bit SL5 system with SELinux enabled
and vm.mmap_min_addr=64k with the public exploit :-(
Did this machine have kernel-2.6.18-128.4.1.el5 and hence the
fix for CVE-2009-1895 which allows a user to bypass mmap_min_addr - see
https://rhn.redhat.com/errata/RHSA-2009-1193.html ?
Though I did see that there are other ways of bypassing
vm.mmap_min_addr :-(
--
Dr. Andrew C. Aitchison Computer Officer, DPMMS, Cambridge
[email protected] http://www.dpmms.cam.ac.uk/~werdna
