CVE-2017-5669

Description

The do_shmat function in ipc/shm.c in the Linux kernel through 4.9.12 does not restrict the address calculated by a certain rounding operation, which allows local users to map page zero, and consequently bypass a protection mechanism that exists for the mmap system call, by making crafted shmget and shmat system calls in a privileged context.

7.8

CVSS

Severity: High

CVSS 3.1 •

CVSS 2.0 •

EPSS 0.06%

Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory debian.org Vendor Advisory kernel.org

Affected: n/a n/a

References

Link	Tags
https://usn.ubuntu.com/3583-2/	third party advisory vendor advisory
https://usn.ubuntu.com/3583-1/	third party advisory vendor advisory
http://www.securitytracker.com/id/1037918	third party advisory vdb entry
http://www.securityfocus.com/bid/96754	third party advisory vdb entry
http://www.debian.org/security/2017/dsa-3804	third party advisory vendor advisory
https://bugzilla.kernel.org/show_bug.cgi?id=192931	patch vendor advisory issue tracking
https://github.com/torvalds/linux/commit/95e91b831f87ac8e1f8ed50c14d709089b4e01b8	third party advisory patch
https://github.com/torvalds/linux/commit/e1d35d4dc7f089e6c9c080d556feedf9c706f0c7	third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2017-5669?: CVE-2017-5669 has been scored as a high severity vulnerability.
How to fix CVE-2017-5669?: To fix CVE-2017-5669, 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-2017-5669 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2017-5669 is being actively exploited. 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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