CVE-2017-12192

Description

The keyctl_read_key function in security/keys/keyctl.c in the Key Management subcomponent in the Linux kernel before 4.13.5 does not properly consider that a key may be possessed but negatively instantiated, which allows local users to cause a denial of service (OOPS and system crash) via a crafted KEYCTL_READ operation.

Category

5.5
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.04%
Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory redhat.com Vendor Advisory kernel.org Vendor Advisory kernel.org Vendor Advisory github.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://bugzilla.redhat.com/show_bug.cgi?id=1493435 third party advisory issue tracking
https://usn.ubuntu.com/3583-2/ vendor advisory
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.5 vendor advisory
https://usn.ubuntu.com/3583-1/ vendor advisory
https://access.redhat.com/errata/RHSA-2018:0151 vendor advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=37863c43b2c6464f252862bf2e9768264e961678 patch vendor advisory
https://github.com/torvalds/linux/commit/37863c43b2c6464f252862bf2e9768264e961678 patch vendor advisory
https://lkml.org/lkml/2017/9/18/764 third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2017-12192?
CVE-2017-12192 has been scored as a medium severity vulnerability.
How to fix CVE-2017-12192?
To fix CVE-2017-12192, 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-2017-12192 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2017-12192 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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