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.
History
2021-09-03: Initial vulnerability report published.
