Ubuntu 16.04 LTS : Linux kernel (HWE) vulnerabilities (USN-3740-2) (Foreshadow)
high Nessus Plugin ID 111750
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Synopsis
The remote Ubuntu host is missing one or more security-related patches.Description
USN-3740-1 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 LTS for Ubuntu 16.04 LTS.It was discovered that memory present in the L1 data cache of an Intel CPU core may be exposed to a malicious process that is executing on the CPU core. This vulnerability is also known as L1 Terminal Fault (L1TF). A local attacker in a guest virtual machine could use this to expose sensitive information (memory from other guests or the host OS). (CVE-2018-3646)
It was discovered that memory present in the L1 data cache of an Intel CPU core may be exposed to a malicious process that is executing on the CPU core. This vulnerability is also known as L1 Terminal Fault (L1TF). A local attacker could use this to expose sensitive information (memory from the kernel or other processes).
(CVE-2018-3620)
Juha-Matti Tilli discovered that the IP implementation in the Linux kernel performed algorithmically expensive operations in some situations when handling incoming packet fragments. A remote attacker could use this to cause a denial of service. (CVE-2018-5391).
Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
Solution
Update the affected packages.See Also
Plugin Details
Severity: High
ID: 111750
File Name: ubuntu_USN-3740-2.nasl
Version: 1.9
Type: local
Agent: unix
Family: Ubuntu Local Security Checks
Published: 8/15/2018
Updated: 9/17/2020
Dependencies: ssh_get_info.nasl, linux_alt_patch_detect.nasl
Risk Information
VPR
Risk Factor: Medium
Score: 5.2
CVSS v2
Risk Factor: High
Base Score: 7.8
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C
CVSS v3
Risk Factor: High
Base Score: 7.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Vulnerability Information
CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-hwe-16.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-lpae-hwe-16.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-gke, p-cpe:/a:canonical:ubuntu_linux:linux-image-lowlatency-hwe-16.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-virtual-hwe-16.04, cpe:/o:canonical:ubuntu_linux:16.04
Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l
Patch Publication Date: 8/14/2018
Vulnerability Publication Date: 8/14/2018
Reference Information
USN: 3740-2