CVE-2019-11190

Public Exploit

Description

The Linux kernel before 4.8 allows local users to bypass ASLR on setuid programs (such as /bin/su) because install_exec_creds() is called too late in load_elf_binary() in fs/binfmt_elf.c, and thus the ptrace_may_access() check has a race condition when reading /proc/pid/stat.

Category

4.7
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.01%
Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory opensuse.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://www.openwall.com/lists/oss-security/2019/04/03/4 third party advisory mailing list exploit
https://www.openwall.com/lists/oss-security/2019/04/03/4/1 third party advisory mailing list exploit
https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/commit/?id=a5b5352558f6808db0589644ea5401b3e3148a0d third party advisory patch
https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/commit/?id=e1676b55d874a43646e8b2c46d87f2f3e45516ff third party advisory patch
http://www.securityfocus.com/bid/107890 vdb entry
http://www.openwall.com/lists/oss-security/2019/04/15/1 mailing list
https://lists.debian.org/debian-lts-announce/2019/05/msg00041.html mailing list
https://lists.debian.org/debian-lts-announce/2019/05/msg00042.html mailing list
https://usn.ubuntu.com/4008-1/ vendor advisory
https://usn.ubuntu.com/4008-2/ vendor advisory
https://usn.ubuntu.com/4008-3/ vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00039.html vendor advisory

Frequently Asked Questions

What is the severity of CVE-2019-11190?
CVE-2019-11190 has been scored as a medium severity vulnerability.
How to fix CVE-2019-11190?
To fix CVE-2019-11190, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-11190 being actively exploited in the wild?
It is possible that CVE-2019-11190 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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