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tools-for-CVE-2018-1000001 — Tools for get offsets and adding patch for support i386 | Kitploit
Tools/GitHubGitHub/usernameid0/tools-for-cve-2018-1000001
Privilege EscalationVulnerability AnalysisExploitationShellcodePayload DevelopmentBinary Exploitation
GitHubusernameid0/tools-for-cve-2018-1000001

tools-for-CVE-2018-1000001

Tools for get offsets and adding patch for support i386

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4 years agoNot yet reviewed

Tools for CVE-2018-1000001

Check vulnerability:

root@kitploit:~
$ cat /proc/sys/kernel/unprivileged_userns_clone

Output:

root@kitploit:~
1

If file "/proc/sys/kernel/unprivileged_userns_clone" does not exists:

root@kitploit:~
$ unshare -mU /bin/sh -c "sleep 5" & /bin/sh -c "sleep 1; cd /proc/$!/cwd; realpath .; kill -9 $!"

The output must contain the string "(unreachable)" before '/':

root@kitploit:~
[1] 12345
(unreachable)/home/user

tool.so

Options are passed via Environment variables:

root@kitploit:~
TRACE_DEBUG=1  - Value for printing debug information (Default: 0)
STACK_SIZE=100 - Size output data of stack (Default: 100)

How to run:

root@kitploit:~
$ make
$ cp /bin/umount .
$ LD_PRELOAD="$(realpath tool.so)" TRACE_DEBUG=1 STACK_SIZE=100 ./umount /root

More

https://www.halfdog.net/Security/2017/LibcRealpathBufferUnderflow/

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