CVE-2016-9604 Information

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 Vector

CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N

Reference

http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-9604.html http://www.securityfocus.com/bid/102135 https://access.redhat.com/errata/RHSA-2017:1842 https://access.redhat.com/errata/RHSA-2017:2077 https://access.redhat.com/errata/RHSA-2017:2669 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

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction Required

HIGH

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

NONE

Base Severity

4.4