The KEYS subsystem in the Linux kernel omitted an access-control check when writing a key to the current task's default keyring, allowing a local user to bypass security checks to the keyring. This compromises the validity of the keyring for those who rely on it.
Find out more about CVE-2017-17807 from the MITRE CVE dictionary dictionary and NIST NVD.
This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 5. This is not currently planned to be addressed in future updates of the product due to its life cycle. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.
This issue affects the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 6, 7, its real-time kernel, Red Hat Enterprise MRG 2, Red Hat Enterprise Linux 7 for ARM 64 and Red Hat Enterprise Linux 7 for Power 9 LE. Future Linux kernel updates for the respective releases may address this issue.
NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.
| CVSS3 Base Score | 3.3 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
| Attack Vector | Local |
| Attack Complexity | Low |
| Privileges Required | Low |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity Impact | Low |
| Availability Impact | None |
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise MRG 2 | realtime-kernel | Will not fix |
| Red Hat Enterprise Linux 7 | kernel-alt | Will not fix |
| Red Hat Enterprise Linux 7 | kernel | Will not fix |
| Red Hat Enterprise Linux 7 | kernel-rt | Will not fix |
| Red Hat Enterprise Linux 6 | kernel | Will not fix |
| Red Hat Enterprise Linux 5 | kernel | Will not fix |
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