Incorrect Permission Assignment for Critical Resource Affecting kernel-bootwrapper package, versions <0:3.10.0-693.el7
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-CENTOS7-KERNELBOOTWRAPPER-2082973
- published26 Jul 2021
- disclosed18 Apr 2017
Introduced: 18 Apr 2017
CVE-2016-9604 (opens in a new tab)How to fix?
Upgrade Centos:7 kernel-bootwrapper to version 0:3.10.0-693.el7 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-bootwrapper package and not the kernel-bootwrapper package as distributed by Centos.
See How to fix? for Centos:7 relevant fixed versions and status.
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.
References
- http://www.securityfocus.com/bid/102135
- http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-9604.html
- https://bugzilla.novell.com/show_bug.cgi?id=1035576
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-9604
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ee8f844e3c5a73b999edf733df1c529d6503ec2f
- https://access.redhat.com/security/cve/CVE-2016-9604
- https://access.redhat.com/errata/RHSA-2017:1842