CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
COMPLETE
AV:N/AC:M/Au:S/C:P/I:P/A:C
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
86.0%
Medium
Canonical Ubuntu
It was discovered that a race condition existed in the perf subsystem of the Linux kernel, leading to a use-after-free vulnerability. An attacker with access to the perf subsystem could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-14351)
It was discovered that the frame buffer implementation in the Linux kernel did not properly handle some edge cases in software scrollback. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-14390)
It was discovered that the netfilter connection tracker for netlink in the Linux kernel did not properly perform bounds checking in some situations. A local attacker could use this to cause a denial of service (system crash). (CVE-2020-25211)
It was discovered that the Rados block device (rbd) driver in the Linux kernel did not properly perform privilege checks for access to rbd devices in some situations. A local attacker could use this to map or unmap rbd block devices. (CVE-2020-25284)
It was discovered that a race condition existed in the hugetlb sysctl implementation in the Linux kernel. A privileged attacker could use this to cause a denial of service (system crash). (CVE-2020-25285)
It was discovered that the block layer subsystem in the Linux kernel did not properly handle zero-length requests. A local attacker could use this to cause a denial of service. (CVE-2020-25641)
It was discovered that the HDLC PPP implementation in the Linux kernel did not properly validate input in some situations. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-25643)
It was discovered that the GENEVE tunnel implementation in the Linux kernel when combined with IPSec did not properly select IP routes in some situations. An attacker could use this to expose sensitive information (unencrypted network traffic). (CVE-2020-25645)
It was discovered that the framebuffer implementation in the Linux kernel did not properly perform range checks in certain situations. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2020-28915)
It was discovered that Power 9 processors could be coerced to expose information from the L1 cache in certain situations. A local attacker could use this to expose sensitive information. (CVE-2020-4788)
CVEs contained in this USN include: CVE-2020-25285, CVE-2020-25641, CVE-2020-28915, CVE-2020-4788, CVE-2020-14351, CVE-2020-25284, CVE-2020-25211, CVE-2020-25645, CVE-2020-25643, CVE-2020-14390.
Severity is medium unless otherwise noted.
Users of affected products are strongly encouraged to follow the mitigations below. The Cloud Foundry project recommends upgrading the following releases:
2021-01-13: Initial vulnerability report published.
Vendor | Product | Version | CPE |
---|---|---|---|
cloudfoundry | xenial_stemcells | * | cpe:2.3:a:cloudfoundry:xenial_stemcells:*:*:*:*:*:*:*:* |
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
COMPLETE
AV:N/AC:M/Au:S/C:P/I:P/A:C
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
86.0%