USN-4068-2: Linux kernel (HWE) vulnerabilities
- Canonical Ubuntu 16.04
USN-4068-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 18.04 for Ubuntu 16.04 LTS.
Adam Zabrocki discovered that the Intel i915 kernel mode graphics driver in the Linux kernel did not properly restrict mmap() ranges in some situations. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-11085)
It was discovered that a race condition leading to a use-after-free existed in the Reliable Datagram Sockets (RDS) protocol implementation in the Linux kernel. The RDS protocol is blacklisted by default in Ubuntu. If enabled, a local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-11815)
It was discovered that the ext4 file system implementation in the Linux kernel did not properly zero out memory in some situations. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2019-11833)
It was discovered that the Bluetooth Human Interface Device Protocol (HIDP) implementation in the Linux kernel did not properly verify strings were NULL terminated in certain situations. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2019-11884)
CVEs contained in this USN include: CVE-2019-11815, CVE-2019-11833, CVE-2019-11884, CVE-2019-11085
Severity is medium unless otherwise noted.
- Vulnerable Cloud Foundry components individually listed here.
- Impacted stemcells may be updated independently of upgrading Pivotal Application Service or PCF Isolation Segment.
- Pivotal Operations Manager is vulnerable in the following releases:
- 2.6.x versions prior to 2.6.6
- 2.5.x versions prior to 2.5.12
- 2.4.x versions prior to 2.4.17
- 2.3.x versions prior to 2.3.24
Users of affected versions should apply the following mitigation:
- The Cloud Foundry security team recommends upgrading BOSH to the affected OSS components listed here if applicable.
- Upgrade Pivotal products that use earlier versions of CF components to new Pivotal releases using new versions linked above. On the Pivotal Network product page for each release, check the Depends On section and/or Release Notes for this information.
- Releases that have fixed this issue include:
- Pivotal Operations Manager: 2.6.6, 2.5.12, 2.4.17, 2.3.24