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

Severity

high

    Threat Intelligence

    EPSS
    0.06% (27th percentile)

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  • Snyk ID SNYK-ORACLE5-KERNELUEKDEBUG-2520630
  • published 10 Apr 2022
  • disclosed 11 Jul 2018
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Introduced: 11 Jul 2018

CVE-2016-9604 Open this link in a new tab
CWE-347 Open this link in a new tab

How to fix?

Upgrade Oracle:5 kernel-uek-debug 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-debug package and not the kernel-uek-debug 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

CVSS Scores

version 3.1
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Snyk

4.4 high
  • Attack Vector (AV)
    Local
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    High
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    None
  • Integrity (I)
    High
  • Availability (A)
    None
Expand this section

NVD

4.4 medium
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Red Hat

4.4 medium