CVE-2019-1125

Published: 6 August 2019

An information disclosure vulnerability exists when certain central processing units (CPU) speculatively access memory, aka 'Windows Kernel Information Disclosure Vulnerability'. This CVE ID is unique from CVE-2019-1071, CVE-2019-1073.

From the Ubuntu Security Team

Andrei Vlad Lutas and Dan Lutas discovered that some x86 processors incorrectly handle SWAPGS instructions during speculative execution. A local attacker could use this to expose sensitive information (kernel memory).

Notes

Author	Note
tyhicks	This issue is not believed to be exploitable in the Linux kernel but kernel updates will be made available to ensure that it cannot be exploited Kernel updates will soon be available for testing in the Proposed pocket and they are expected to be officially released on August 12th See the following page if you'd like to test the patched kernels from the Proposed pocket: https://wiki.ubuntu.com/Testing/EnableProposed

Author

Note

tyhicks

This issue is not believed to be exploitable in the Linux kernel but
kernel updates will be made available to ensure that it cannot be exploited
Kernel updates will soon be available for testing in the Proposed
pocket and they are expected to be officially released on August 12th
See the following page if you'd like to test the patched kernels from
the Proposed pocket: https://wiki.ubuntu.com/Testing/EnableProposed

Priority

Cvss 3 Severity Score

5.5

Score breakdown

Status

Package	Release	Status
linux Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-58.64)
	disco	Released (5.0.0-25.26)
	eoan	Not vulnerable (5.2.0-13.14)
	trusty	Ignored (was needs-triage ESM criteria)
	upstream	Released (5.3~rc4)
	xenial	Released (4.4.0-159.187)
	Patches: Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Fixed by 18ec54fdd6d18d92025af097cd042a75cf0ea24c Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Fixed by a2059825986a1c8143fd6698774fa9d83733bb11
linux-aws Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1045.47)
	disco	Released (5.0.0-1012.13)
	eoan	Not vulnerable (5.0.0-1012.13)
	trusty	Released (4.4.0-1054.58) Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
	upstream	Released (5.3~rc4)
	xenial	Released (4.4.0-1090.101)
linux-aws-5.0 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (5.0.0-1021.24~18.04.1)
	disco	Does not exist
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.3~rc4)
	xenial	Does not exist
linux-aws-hwe Launchpad, Ubuntu, Debian	bionic	Does not exist
	disco	Does not exist
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.3~rc4)
	xenial	Released (4.15.0-1045.47~16.04.1)
linux-azure Launchpad, Ubuntu, Debian	bionic	Released (5.0.0-1014.14~18.04.1)
	disco	Released (5.0.0-1014.14)
	eoan	Not vulnerable (5.0.0-1014.14)
	trusty	Released (4.15.0-1059.64~14.04.1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
	upstream	Released (5.3~rc4)
	xenial	Released (4.15.0-1055.60)
linux-azure-5.3 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (5.3.0-1007.8~18.04.1)
	disco	Does not exist
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.3~rc4)
	xenial	Does not exist
linux-azure-edge Launchpad, Ubuntu, Debian	bionic	Released (5.0.0-1014.14~18.04.1)
	disco	Does not exist
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.3~rc4)
	xenial	Released (4.15.0-1055.60)
linux-gcp Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1040.42)
	disco	Released (5.0.0-1013.13)
	eoan	Not vulnerable (5.0.0-1013.13)
	trusty	Does not exist
	upstream	Released (5.3~rc4)
	xenial	Released (4.15.0-1040.42~16.04.1)
linux-gcp-5.3 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (5.3.0-1008.9~18.04.1)
	disco	Does not exist
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.3~rc4)
	xenial	Does not exist
linux-gcp-edge Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1040.42)
	disco	Does not exist
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.3~rc4)
	xenial	Does not exist
linux-gke-4.15 Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1040.42)
	disco	Does not exist
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.3~rc4)
	xenial	Does not exist
linux-gke-5.0 Launchpad, Ubuntu, Debian	bionic	Released (5.0.0-1013.13~18.04.1)
	disco	Does not exist
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.3~rc4)
	xenial	Does not exist
linux-hwe Launchpad, Ubuntu, Debian	bionic	Released (5.0.0-25.26~18.04.1)
	disco	Does not exist
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.3~rc4)
	xenial	Released (4.15.0-58.64~16.04.1)
linux-hwe-edge Launchpad, Ubuntu, Debian	bionic	Ignored (end of life, was pending)
	disco	Does not exist
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.3~rc4)
	xenial	Released (4.15.0-58.64~16.04.1)
linux-kvm Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1042.42)
	disco	Released (5.0.0-1013.14)
	eoan	Not vulnerable (5.0.0-1013.14)
	trusty	Does not exist
	upstream	Released (5.3~rc4)
	xenial	Released (4.4.0-1054.61)
linux-lts-trusty Launchpad, Ubuntu, Debian	bionic	Does not exist
	disco	Does not exist
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.3~rc4)
	xenial	Does not exist
linux-lts-xenial Launchpad, Ubuntu, Debian	bionic	Does not exist
	disco	Does not exist
	eoan	Does not exist
	trusty	Released (4.4.0-164.192~14.04.1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
	upstream	Released (5.3~rc4)
	xenial	Does not exist
linux-oem Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1050.57)
	disco	Released (4.15.0-1050.57)
	eoan	Released (4.15.0-1050.57)
	trusty	Does not exist
	upstream	Released (5.3~rc4)
	xenial	Ignored (end of standard support, was needs-triage)
linux-oem-5.4 Launchpad, Ubuntu, Debian	bionic	Does not exist
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.3~rc4)
	xenial	Does not exist
linux-oem-osp1 Launchpad, Ubuntu, Debian	bionic	Released (5.0.0-1018.20)
	disco	Ignored (end of life, was pending)
	eoan	Released (5.0.0-1018.20)
	trusty	Does not exist
	upstream	Released (5.3~rc4)
	xenial	Does not exist
linux-oracle Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1021.23)
	disco	Released (5.0.0-1004.8)
	eoan	Not vulnerable (5.3.0-1002.2)
	trusty	Does not exist
	upstream	Released (5.3~rc4)
	xenial	Released (4.15.0-1021.23~16.04.1)
linux-oracle-5.0 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (5.0.0-1007.12~18.04.1)
	disco	Does not exist
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.3~rc4)
	xenial	Does not exist
linux-raspi2 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (does not affect ARM processors)
	disco	Not vulnerable (does not affect ARM processors)
	eoan	Not vulnerable (does not affect ARM processors)
	trusty	Does not exist
	upstream	Released (5.3~rc4)
	xenial	Not vulnerable (does not affect ARM processors)
linux-raspi2-5.3 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (5.3.0-1017.19~18.04.1)
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.3~rc4)
	xenial	Does not exist
linux-snapdragon Launchpad, Ubuntu, Debian	bionic	Not vulnerable (does not affect ARM processors)
	disco	Not vulnerable (does not affect ARM processors)
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.3~rc4)
	xenial	Not vulnerable (does not affect ARM processors)

Severity score breakdown

Parameter	Value
Base score	5.5
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	None
Availability impact	None
Vector	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

References

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