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cloudfoundryCloud FoundryCFOUNDRY:DA24B69807C52E879C56B9ABE4845D93
HistorySep 07, 2021 - 12:00 a.m.

USN-5045-1: Linux kernel vulnerabilities | Cloud Foundry

2021-09-0700:00:00
Cloud Foundry
www.cloudfoundry.org
23

EPSS

0

Percentile

9.8%

Severity

Medium

Vendor

Canonical Ubuntu

Versions Affected

  • Canonical Ubuntu 18.04

Description

Norbert Slusarek discovered that the CAN broadcast manger (bcm) protocol implementation in the Linux kernel did not properly initialize memory in some situations. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2021-34693)

It was discovered that the bluetooth subsystem in the Linux kernel did not properly handle HCI device initialization failure, leading to a double-free vulnerability. An attacker could use this to cause a denial of service or possibly execute arbitrary code. (CVE-2021-3564)

It was discovered that the bluetooth subsystem in the Linux kernel did not properly handle HCI device detach events, leading to a use-after-free vulnerability. An attacker could use this to cause a denial of service or possibly execute arbitrary code. (CVE-2021-3573)

It was discovered that the NFC implementation in the Linux kernel did not properly handle failed connect events leading to a NULL pointer dereference. A local attacker could use this to cause a denial of service. (CVE-2021-3587)

CVEs contained in this USN include: CVE-2021-3573, CVE-2021-3564, CVE-2021-3587, CVE-2021-34693.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

  • Bionic Stemcells
    • 1.x versions prior to 1.24
    • All other stemcells not listed.

Mitigation

Users of affected products are strongly encouraged to follow the mitigations below. The Cloud Foundry project recommends upgrading the following releases:

  • Bionic Stemcells
    • Upgrade 1.x versions to 1.24 or greater
    • All other stemcells should be upgraded to the latest version available on bosh.io.

References

History

2021-09-03: Initial vulnerability report published.