CVE-2016-9604

LOW

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.

References

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

Details

Source: MITRE

Published: 2018-07-11

Updated: 2019-10-09

Type: CWE-347

Risk Information

CVSS v2.0

Base Score: 2.1

Vector: AV:L/AC:L/Au:N/C:N/I:P/A:N

Impact Score: 2.9

Exploitability Score: 3.9

Severity: LOW

CVSS v3.0

Base Score: 4.4

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

Impact Score: 3.6

Exploitability Score: 0.8

Severity: MEDIUM