Ubuntu Security Notice 5985-1 - It was discovered that the System V IPC implementation in the Linux kernel did not properly handle large shared memory counts. A local attacker could use this to cause a denial of service. It was discovered that the KVM VMX implementation in the Linux kernel did not properly handle indirect branch prediction isolation between L1 and L2 VMs. An attacker in a guest VM could use this to expose sensitive information from the host OS or other guest VMs.
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Ubuntu Security Notice USN-5985-1
March 29, 2023
linux-aws-5.4, linux-azure-5.4, linux-gcp-5.4, linux-hwe-5.4,
linux-ibm-5.4, linux-oracle-5.4, linux-raspi-5.4 vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 18.04 LTS
Summary:
Several security issues were fixed in the Linux kernel.
Software Description:
- linux-aws-5.4: Linux kernel for Amazon Web Services (AWS) systems
- linux-azure-5.4: Linux kernel for Microsoft Azure cloud systems
- linux-gcp-5.4: Linux kernel for Google Cloud Platform (GCP) systems
- linux-hwe-5.4: Linux hardware enablement (HWE) kernel
- linux-ibm-5.4: Linux kernel for IBM cloud systems
- linux-oracle-5.4: Linux kernel for Oracle Cloud systems
- linux-raspi-5.4: Linux kernel for Raspberry Pi systems
Details:
It was discovered that the System V IPC implementation in the Linux kernel
did not properly handle large shared memory counts. A local attacker could
use this to cause a denial of service (memory exhaustion). (CVE-2021-3669)
It was discovered that the KVM VMX implementation in the Linux kernel did
not properly handle indirect branch prediction isolation between L1 and L2
VMs. An attacker in a guest VM could use this to expose sensitive
information from the host OS or other guest VMs. (CVE-2022-2196)
Gerald Lee discovered that the USB Gadget file system implementation in the
Linux kernel contained a race condition, leading to a use-after-free
vulnerability in some situations. A local attacker could use this to cause
a denial of service (system crash) or possibly execute arbitrary code.
(CVE-2022-4382)
It was discovered that the RNDIS USB driver in the Linux kernel contained
an integer overflow vulnerability. A local attacker with physical access
could plug in a malicious USB device to cause a denial of service (system
crash) or possibly execute arbitrary code. (CVE-2023-23559)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 18.04 LTS:
linux-image-5.4.0-1046-ibm 5.4.0-1046.51~18.04.1
linux-image-5.4.0-1082-raspi 5.4.0-1082.93~18.04.1
linux-image-5.4.0-1098-oracle 5.4.0-1098.107~18.04.1
linux-image-5.4.0-1099-aws 5.4.0-1099.107~18.04.1
linux-image-5.4.0-1102-gcp 5.4.0-1102.111~18.04.2
linux-image-5.4.0-1105-azure 5.4.0-1105.111~18.04.1
linux-image-5.4.0-146-generic 5.4.0-146.163~18.04.1
linux-image-5.4.0-146-generic-lpae 5.4.0-146.163~18.04.1
linux-image-5.4.0-146-lowlatency 5.4.0-146.163~18.04.1
linux-image-aws 5.4.0.1099.77
linux-image-azure 5.4.0.1105.78
linux-image-gcp 5.4.0.1102.78
linux-image-generic-hwe-18.04 5.4.0.146.163~18.04.117
linux-image-generic-lpae-hwe-18.04 5.4.0.146.163~18.04.117
linux-image-ibm 5.4.0.1046.57
linux-image-lowlatency-hwe-18.04 5.4.0.146.163~18.04.117
linux-image-oem 5.4.0.146.163~18.04.117
linux-image-oem-osp1 5.4.0.146.163~18.04.117
linux-image-oracle 5.4.0.1098.107~18.04.70
linux-image-raspi-hwe-18.04 5.4.0.1082.79
linux-image-snapdragon-hwe-18.04 5.4.0.146.163~18.04.117
linux-image-virtual-hwe-18.04 5.4.0.146.163~18.04.117
After a standard system update you need to reboot your computer to make
all the necessary changes.
ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.
References:
https://ubuntu.com/security/notices/USN-5985-1
CVE-2021-3669, CVE-2022-2196, CVE-2022-4382, CVE-2023-23559
Package Information:
https://launchpad.net/ubuntu/+source/linux-aws-5.4/5.4.0-1099.107~18.04.1
https://launchpad.net/ubuntu/+source/linux-azure-5.4/5.4.0-1105.111~18.04.1
https://launchpad.net/ubuntu/+source/linux-gcp-5.4/5.4.0-1102.111~18.04.2
https://launchpad.net/ubuntu/+source/linux-hwe-5.4/5.4.0-146.163~18.04.1
https://launchpad.net/ubuntu/+source/linux-ibm-5.4/5.4.0-1046.51~18.04.1
https://launchpad.net/ubuntu/+source/linux-oracle-5.4/5.4.0-1098.107~18.04.1
https://launchpad.net/ubuntu/+source/linux-raspi-5.4/5.4.0-1082.93~18.04.1