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Improper Preservation of Permissions Affecting kernel-tools-devel package, versions <0:4.14.268-205.500.amzn2

Severity

 Recommended
0.0
high
0
10

Based on Amazon Linux security rating

    Threat Intelligence

    Exploit Maturity
    Mature
    EPSS
    12.09% (96th percentile)

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  • Snyk ID SNYK-AMZN2-KERNELTOOLSDEVEL-2419727
  • published 9 Mar 2022
  • disclosed 10 Mar 2022
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Introduced: 9 Mar 2022

CVE-2022-0847 Open this link in a new tab
CWE-281 Open this link in a new tab
CWE-909 Open this link in a new tab

How to fix?

Upgrade Amazon-Linux:2 kernel-tools-devel to version 0:4.14.268-205.500.amzn2 or higher.
This issue was patched in ALAS2-2022-1761.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-tools-devel package and not the kernel-tools-devel package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe and push_pipe functions in the Linux kernel and could thus contain stale values. An unprivileged local user could use this flaw to write to pages in the page cache backed by read only files and as such escalate their privileges on the system.

References

CVSS Scores

version 3.1
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NVD

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

Red Hat

7.8 high
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SUSE

7.8 high