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USN-4526-1: Linux kernel vulnerabilities | Cloud Foundry

Description

## Severity Medium ## Vendor Canonical Ubuntu ## Versions Affected * Canonical Ubuntu 16.04 ## Description It was discovered that the AMD Cryptographic Coprocessor device driver in the Linux kernel did not properly deallocate memory in some situations. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2019-18808) It was discovered that the Conexant 23885 TV card device driver for the Linux kernel did not properly deallocate memory in some error conditions. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2019-19054) It was discovered that the ADIS16400 IIO IMU Driver for the Linux kernel did not properly deallocate memory in certain error conditions. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2019-19061) It was discovered that the AMD Audio Coprocessor driver for the Linux kernel did not properly deallocate memory in certain error conditions. A local attacker with the ability to load modules could use this to cause a denial of service (memory exhaustion). (CVE-2019-19067) It was discovered that the Atheros HTC based wireless driver in the Linux kernel did not properly deallocate in certain error conditions. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2019-19073, CVE-2019-19074) It was discovered that the F2FS file system in the Linux kernel did not properly perform bounds checking in some situations, leading to an out-of- bounds read. A local attacker could possibly use this to expose sensitive information (kernel memory). (CVE-2019-9445) It was discovered that the VFIO PCI driver in the Linux kernel did not properly handle attempts to access disabled memory spaces. A local attacker could use this to cause a denial of service (system crash). (CVE-2020-12888) It was discovered that the cgroup v2 subsystem in the Linux kernel did not properly perform reference counting in some situations, leading to a NULL pointer dereference. A local attacker could use this to cause a denial of service or possibly gain administrative privileges. (CVE-2020-14356) It was discovered that the state of network RNG in the Linux kernel was potentially observable. A remote attacker could use this to expose sensitive information. (CVE-2020-16166) CVEs contained in this USN include: CVE-2019-19061, CVE-2019-19067, CVE-2020-14356, CVE-2019-18808, CVE-2019-19054, CVE-2020-12888, CVE-2020-16166, CVE-2019-19073, CVE-2019-19074, CVE-2019-9445. ## Affected Cloud Foundry Products and Versions _Severity is medium unless otherwise noted._ * Xenial Stemcells * 250.x versions prior to 250.207 * 315.x versions prior to 315.194 * 456.x versions prior to 456.121 * 621.x versions prior to 621.85 * 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: * Xenial Stemcells * Upgrade 250.x versions to 250.207 or greater * Upgrade 315.x versions to 315.194 or greater * Upgrade 456.x versions to 456.121 or greater * Upgrade 621.x versions to 621.85 or greater * All other stemcells should be upgraded to the latest version available on [bosh.io](<https://bosh.io/stemcells>). ## References * [USN Notice](<https://usn.ubuntu.com/4526-1/>) * [CVE-2019-19061](<https://people.canonical.com/~ubuntu-security/cve/CVE-2019-19061>) * [CVE-2019-19067](<https://people.canonical.com/~ubuntu-security/cve/CVE-2019-19067>) * [CVE-2020-14356](<https://people.canonical.com/~ubuntu-security/cve/CVE-2020-14356>) * [CVE-2019-18808](<https://people.canonical.com/~ubuntu-security/cve/CVE-2019-18808>) * [CVE-2019-19054](<https://people.canonical.com/~ubuntu-security/cve/CVE-2019-19054>) * [CVE-2020-12888](<https://people.canonical.com/~ubuntu-security/cve/CVE-2020-12888>) * [CVE-2020-16166](<https://people.canonical.com/~ubuntu-security/cve/CVE-2020-16166>) * [CVE-2019-19073](<https://people.canonical.com/~ubuntu-security/cve/CVE-2019-19073>) * [CVE-2019-19074](<https://people.canonical.com/~ubuntu-security/cve/CVE-2019-19074>) * [CVE-2019-9445](<https://people.canonical.com/~ubuntu-security/cve/CVE-2019-9445>) ## History 2020-11-20: Initial vulnerability report published.


Affected Software


CPE Name Name Version
xenial stemcells 250.207
xenial stemcells 315.194
xenial stemcells 456.121
xenial stemcells 621.85

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