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USN-4144-1: Linux kernel vulnerabilities


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USN-4144-1: Linux kernel vulnerabilities

Severity

Medium

Vendor

Canonical Ubuntu

Versions Affected

  • Canonical Ubuntu 16.04

Description

It was discovered that the XFS file system in the Linux kernel did not properly handle mount failures in some situations. A local attacker could possibly use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2018-20976)

Benjamin Moody discovered that the XFS file system in the Linux kernel did not properly handle an error condition when out of disk quota. A local attacker could possibly use this to cause a denial of service. (CVE-2019-15538)

CVEs contained in this USN include: CVE-2018-20976, CVE-2019-15538

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

  • Cloud Foundry BOSH xenial-stemcells are vulnerable, including:
    • 456.x versions prior to 456.30
    • 315.x versions prior to 315.103
    • 250.x versions prior to 250.116
    • 170.x versions prior to 170.140
    • 97.x versions prior to 97.163
    • All other stemcells not listed.

Mitigation

Users of affected products are strongly encouraged to follow one of the mitigations below:

  • The Cloud Foundry project recommends upgrading the following BOSH xenial-stemcells:
    • Upgrade 456.x versions to 456.30
    • Upgrade 315.x versions to 315.103
    • Upgrade 250.x versions to 250.116
    • Upgrade 170.x versions to 170.140
    • Upgrade 97.x versions to 97.163
    • All other stemcells should be upgraded to the latest version available on bosh.io.

References

Cloud Foundry Foundation Security Team Profile Image

Cloud Foundry Foundation Security Team, AUTHOR

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