USN-3740-2

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Source
https://ubuntu.com/security/notices/USN-3740-2
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/USN-3740-2.json
JSON Data
https://api.osv.dev/v1/vulns/USN-3740-2
Related
Published
2018-08-14T21:46:15.328224Z
Modified
2018-08-14T21:46:15.328224Z
Summary
linux-hwe, linux-azure, linux-gcp vulnerabilities
Details

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)

References

Affected packages

Ubuntu:16.04:LTS / linux-hwe

Package

Name
linux-hwe

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.15.0-32.35~16.04.1

Ecosystem specific

{
    "availability": "No subscription needed",
    "binaries": [
        {
            "linux-image-4.15.0-32-generic-lpae": "4.15.0-32.35~16.04.1",
            "linux-image-4.15.0-32-lowlatency": "4.15.0-32.35~16.04.1",
            "linux-image-unsigned-4.15.0-32-lowlatency": "4.15.0-32.35~16.04.1",
            "linux-image-unsigned-4.15.0-32-generic": "4.15.0-32.35~16.04.1",
            "linux-image-4.15.0-32-generic": "4.15.0-32.35~16.04.1"
        }
    ]
}

Ubuntu:16.04:LTS / linux-gcp

Package

Name
linux-gcp

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.15.0-1017.18~16.04.1

Ecosystem specific

{
    "availability": "No subscription needed",
    "binaries": [
        {
            "linux-image-4.15.0-1017-gcp": "4.15.0-1017.18~16.04.1"
        }
    ]
}

Ubuntu:16.04:LTS / linux-azure

Package

Name
linux-azure

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.15.0-1021.21~16.04.1

Ecosystem specific

{
    "availability": "No subscription needed",
    "binaries": [
        {
            "linux-image-unsigned-4.15.0-1021-azure": "4.15.0-1021.21~16.04.1"
        }
    ]
}