CVE-2016-9604

Advisory lineage Upstream: 0 Downstream: 15
Modified
Published: 11 Jul 2018, 13:00
Last modified:06 Aug 2024, 02:59

Vulnerability Summary

Overall Risk (default)
low
18/100
CVSS Score
4.4 MEDIUM
v3.0 (cve.org)
EPSS Score
0.02% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

11 Jul 2018, 13:00
Published
Vulnerability first disclosed
06 Aug 2024, 02:59
Last Modified
Vulnerability information updated

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 Metrics

  • v3.0•MEDIUM•Score: 4.4CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
  • v2.0•LOW•Score: 2.1AV:L/AC:L/Au:N/C:N/I:P/A:N

EPSS Trends

Current EPSS score: 0.02%• Percentile: 5%

Techniques & Countermeasures

  • CWE-347•Improper Verification of Cryptographic Signature

    The product does not verify, or incorrectly verifies, the cryptographic signature for data.

  • CWE-732•Incorrect Permission Assignment for Critical Resource

    The product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors.

Affected Systems

  • kernel•security

    kernel 4.11-rc8

  • linux•linux_kernel

    ≤ 4.11 | 4.11:rc1 | 4.11:rc2 | 4.11:rc3 | 4.11:rc4 | 4.11:rc5 | 4.11:rc6 | 4.11:rc7

References (8)