USN-4659-1: Linux kernel vulnerabilities
It was discovered that a race condition existed in the binder IPC implementation in the Linux kernel, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-0423) Daniele Antonioli, Nils Ole Tippenhauer, and Kasper Rasmussen discovered that legacy pairing and secure-connections pairing authentication in the Bluetooth protocol could allow an unauthenticated user to complete authentication without pairing credentials via adjacent access. A physically proximate attacker could use this to impersonate a previously paired Bluetooth device. (CVE-2020-10135) 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) Keyu Man discovered that the ICMP global rate limiter in the Linux kernel could be used to assist in scanning open UDP ports. A remote attacker could use to facilitate attacks on UDP based services that depend on source port randomization. (CVE-2020-25705) It was discovered that the KVM hypervisor in the Linux kernel did not properly handle interrupts in certain situations. A local attacker in a guest VM could possibly use this to cause a denial of service (host system crash). (CVE-2020-27152) 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)
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
ubuntu/linux-image-5.8.0-1008-raspito a version that resolves this vulnerability.Fixed in 5.8.0-1008.11 - Upgrade
Upgrade
ubuntu/linux-image-5.8.0-1008-raspi-nolpaeto a version that resolves this vulnerability.Fixed in 5.8.0-1008.11 - Upgrade
Upgrade
ubuntu/linux-image-5.8.0-1011-kvmto a version that resolves this vulnerability.Fixed in 5.8.0-1011.12 - Upgrade
Upgrade
ubuntu/linux-image-5.8.0-1011-oracleto a version that resolves this vulnerability.Fixed in 5.8.0-1011.11 - Upgrade
Upgrade
ubuntu/linux-image-5.8.0-1012-gcpto a version that resolves this vulnerability.Fixed in 5.8.0-1012.12 - Upgrade
Upgrade
ubuntu/linux-image-5.8.0-1013-azureto a version that resolves this vulnerability.Fixed in 5.8.0-1013.14 - Upgrade
Upgrade
ubuntu/linux-image-5.8.0-1014-awsto a version that resolves this vulnerability.Fixed in 5.8.0-1014.15 - Upgrade
Upgrade
ubuntu/linux-image-5.8.0-31-genericto a version that resolves this vulnerability.Fixed in 5.8.0-31.33 - Upgrade
Upgrade
ubuntu/linux-image-5.8.0-31-generic-64kto a version that resolves this vulnerability.Fixed in 5.8.0-31.33 - Upgrade
Upgrade
ubuntu/linux-image-5.8.0-31-generic-lpaeto a version that resolves this vulnerability.Fixed in 5.8.0-31.33 - Upgrade
Upgrade
ubuntu/linux-image-5.8.0-31-lowlatencyto a version that resolves this vulnerability.Fixed in 5.8.0-31.33 - Upgrade
Upgrade
ubuntu/linux-image-awsto a version that resolves this vulnerability.Fixed in 5.8.0.1014.16 - Upgrade
Upgrade
ubuntu/linux-image-azureto a version that resolves this vulnerability.Fixed in 5.8.0.1013.13 - Upgrade
Upgrade
ubuntu/linux-image-gcpto a version that resolves this vulnerability.Fixed in 5.8.0.1012.12 - Upgrade
Upgrade
ubuntu/linux-image-genericto a version that resolves this vulnerability.Fixed in 5.8.0.31.36 - Upgrade
Upgrade
ubuntu/linux-image-generic-64kto a version that resolves this vulnerability.Fixed in 5.8.0.31.36 - Upgrade
Upgrade
ubuntu/linux-image-generic-lpaeto a version that resolves this vulnerability.Fixed in 5.8.0.31.36 - Upgrade
Upgrade
ubuntu/linux-image-gketo a version that resolves this vulnerability.Fixed in 5.8.0.1012.12 - Upgrade
Upgrade
ubuntu/linux-image-kvmto a version that resolves this vulnerability.Fixed in 5.8.0.1011.12 - Upgrade
Upgrade
ubuntu/linux-image-lowlatencyto a version that resolves this vulnerability.Fixed in 5.8.0.31.36 - Upgrade
Upgrade
ubuntu/linux-image-oem-20.04to a version that resolves this vulnerability.Fixed in 5.8.0.31.36 - Upgrade
Upgrade
ubuntu/linux-image-oracleto a version that resolves this vulnerability.Fixed in 5.8.0.1011.11 - Upgrade
Upgrade
ubuntu/linux-image-raspito a version that resolves this vulnerability.Fixed in 5.8.0.1008.11 - Upgrade
Upgrade
ubuntu/linux-image-raspi-nolpaeto a version that resolves this vulnerability.Fixed in 5.8.0.1008.11 - Upgrade
Upgrade
ubuntu/linux-image-virtualto a version that resolves this vulnerability.Fixed in 5.8.0.31.36
Event History
Child vulnerabilities
Contains the following vulnerabilities.
Frequently Asked Questions
What is the vulnerability ID for this advisory?
The vulnerability ID for this advisory is USN-4659-1.
What is the severity of USN-4659-1?
The severity of USN-4659-1 is not mentioned in the description.
What is the affected software for USN-4659-1?
The affected software for USN-4659-1 is the Linux kernel version 5.8.0-1008.11 on Ubuntu 20.10.
How can I fix USN-4659-1?
To fix USN-4659-1, update the Linux kernel to version 5.8.0-1008.11 or later.
Where can I find more information about USN-4659-1?
You can find more information about USN-4659-1 at the following references: [link1](https://ubuntu.com/security/CVE-2020-28915), [link2](https://ubuntu.com/security/CVE-2020-4788), [link3](https://ubuntu.com/security/CVE-2020-10135)