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Improper Verification of Cryptographic Signature Affecting kernel-uek package, versions <0:2.6.39-400.297.6.el5uek

Severity

 Recommended
high

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.06% (29th percentile)

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  • Snyk IDSNYK-ORACLE5-KERNELUEK-2522116
  • published10 Apr 2022
  • disclosed11 Jul 2018
Report a new vulnerability Found a mistake?

Introduced: 11 Jul 2018

CVE-2016-9604  (opens in a new tab)
CWE-347  (opens in a new tab)

How to fix?

Upgrade Oracle:5 kernel-uek to version 0:2.6.39-400.297.6.el5uek or higher.
This issue was patched in ELSA-2017-3607.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-uek package and not the kernel-uek package as distributed by Oracle. See How to fix? for Oracle:5 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