CVE-2016-9604

Description

It was discovered in the Linux kernel before 4.11-rc8 that root can gain direct access to an internal keyring, such as '.dns_resolver' in RHEL-7 or '.builtin_trusted_keys' upstream, by joining it as its session keyring. This allows root to bypass module signature verification by adding a new public key of its own devising to the keyring.

Categories

4.4
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.03%
Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory kernel.org
Affected: kernel security
Published at:
Updated at:

References

Link Tags
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ee8f844e3c5a73b999edf733df1c529d6503ec2f patch vendor advisory
https://access.redhat.com/errata/RHSA-2017:2669 third party advisory vendor advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-9604 issue tracking third party advisory
https://bugzilla.novell.com/show_bug.cgi?id=1035576 issue tracking third party advisory
http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-9604.html third party advisory
http://www.securityfocus.com/bid/102135 vdb entry third party advisory
https://access.redhat.com/errata/RHSA-2017:2077 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2017:1842 third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2016-9604?
CVE-2016-9604 has been scored as a medium severity vulnerability.
How to fix CVE-2016-9604?
To fix CVE-2016-9604, 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-2016-9604 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2016-9604 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.
What software or system is affected by CVE-2016-9604?
CVE-2016-9604 affects kernel security.
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