Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | <= 4.11 |
Related Weaknesses (CWE)
References
- http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-9604.htmlThird Party Advisory
- http://www.securityfocus.com/bid/102135Third Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2017:1842Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2077Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2669Third Party Advisory
- https://bugzilla.novell.com/show_bug.cgi?id=1035576Issue TrackingThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-9604Issue TrackingThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=eePatchVendor Advisory
- http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-9604.htmlThird Party Advisory
- http://www.securityfocus.com/bid/102135Third Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2017:1842Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2077Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2669Third Party Advisory
- https://bugzilla.novell.com/show_bug.cgi?id=1035576Issue TrackingThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-9604Issue TrackingThird Party Advisory
FAQ
What is CVE-2016-9604?
CVE-2016-9604 is a vulnerability with a CVSS score of 4.4 (MEDIUM). 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 i...
How severe is CVE-2016-9604?
CVE-2016-9604 has been rated MEDIUM with a CVSS base score of 4.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2016-9604?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.