USN-4162-1: Linux kernel vulnerabilities
Severity
Medium
Vendor
Canonical Ubuntu
Versions Affected
- Canonical Ubuntu 16.04
Description
It was discovered that the RSI 91x Wi-Fi driver in the Linux kernel did not handle detach operations correctly, leading to a use-after-free vulnerability. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-21008)
Wen Huang discovered that the Marvell Wi-Fi device driver in the Linux kernel did not properly perform bounds checking, leading to a heap overflow. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-14814, CVE-2019-14815, CVE-2019-14816)
Matt Delco discovered that the KVM hypervisor implementation in the Linux kernel did not properly perform bounds checking when handling coalesced MMIO write operations. A local attacker with write access to /dev/kvm could use this to cause a denial of service (system crash). (CVE-2019-14821)
Hui Peng and Mathias Payer discovered that the USB audio driver for the Linux kernel did not properly validate device metadata. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2019-15117)
Hui Peng and Mathias Payer discovered that the USB audio driver for the Linux kernel improperly performed recursion while handling device metadata. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2019-15118)
It was discovered that the Technisat DVB-S/S2 USB device driver in the Linux kernel contained a buffer overread. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information. (CVE-2019-15505)
Brad Spengler discovered that a Spectre mitigation was improperly implemented in the ptrace susbsystem of the Linux kernel. A local attacker could possibly use this to expose sensitive information. (CVE-2019-15902)
It was discovered that the SMB networking file system implementation in the Linux kernel contained a buffer overread. An attacker could use this to expose sensitive information (kernel memory). (CVE-2019-15918)
CVEs contained in this USN include: CVE-2019-15117, CVE-2019-15118, CVE-2019-14814, CVE-2019-14815, CVE-2019-14816, CVE-2019-14821, CVE-2019-15505, CVE-2019-15902, CVE-2018-21008, CVE-2019-15918
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 456.51
- 315.x versions prior to 315.126
- 250.x versions prior to 250.142
- 170.x versions prior to 170.162
- 97.x versions prior to 97.187
- 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 456.51
- Upgrade 315.x versions to 315.126
- Upgrade 250.x versions to 250.142
- Upgrade 170.x versions to 170.162
- Upgrade 97.x versions to 97.187
- All other stemcells should be upgraded to the latest version available on bosh.io.
