CVE-2023-20569

2023-08-0800:00:00

ubuntu.com

4.7 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

1 Low

CVSS2

Access Vector

LOCAL

Access Complexity

HIGH

Authentication

SINGLE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:L/AC:H/Au:S/C:P/I:N/A:N

0.0004 Low

EPSS

Percentile

8.9%

JSON

A side channel vulnerability on some of the AMD CPUs may allow an attacker
to influence the return address prediction. This may result in speculative
execution at an attacker-controlled address, potentially leading to
information disclosure.

Notes

Author	Note
	Priority reason: Unprivileged local attackers may use this vulnerability to extract confidential data.
alexmurray	The listed microcode revisions for 3rd Gen AMD EPYC processors in AMD-SB-7005 were provided to the upstream linux-firmware repo in commit b250b32ab1d044953af2dc5e790819a7703b7ee6 whilst the 4th Gen microcode was provided in commit f2eb058afc57348cde66852272d6bf11da1eef8f. This is not planned to be fixed for the amd64-microcode package in Ubuntu 14.04 as that release was already outside of the LTS timeframe when this hardware platform was launched.

Author

Note

Priority reason: Unprivileged local attackers may use this vulnerability to extract confidential data.

alexmurray

The listed microcode revisions for 3rd Gen AMD EPYC processors in AMD-SB-7005 were provided to the upstream linux-firmware repo in commit b250b32ab1d044953af2dc5e790819a7703b7ee6 whilst the 4th Gen microcode was provided in commit f2eb058afc57348cde66852272d6bf11da1eef8f. This is not planned to be fixed for the amd64-microcode package in Ubuntu 14.04 as that release was already outside of the LTS timeframe when this hardware platform was launched.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchamd64-microcode< 3.20191021.1+really3.20181128.1~ubuntu0.18.04.1+esm2) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu20.04noarchamd64-microcode< 3.20191218.1ubuntu1.2UNKNOWN
ubuntu22.04noarchamd64-microcode< 3.20191218.1ubuntu2.2UNKNOWN
ubuntu23.04noarchamd64-microcode< 3.20220411.1ubuntu3.2UNKNOWN
ubuntu23.10noarchamd64-microcode< 3.20230808.1.1ubuntu1UNKNOWN
ubuntu24.04noarchamd64-microcode< 3.20230808.1.1ubuntu1UNKNOWN
ubuntu16.04noarchamd64-microcode< 3.20191021.1+really3.20180524.1~ubuntu0.16.04.2+esm2) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu18.04noarchlinux< anyUNKNOWN
ubuntu20.04noarchlinux< anyUNKNOWN
ubuntu22.04noarchlinux< 5.15.0-86.96UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	amd64-microcode	< 3.20191021.1+really3.20181128.1~ubuntu0.18.04.1+esm2) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	20.04	noarch	amd64-microcode	< 3.20191218.1ubuntu1.2	UNKNOWN
ubuntu	22.04	noarch	amd64-microcode	< 3.20191218.1ubuntu2.2	UNKNOWN
ubuntu	23.04	noarch	amd64-microcode	< 3.20220411.1ubuntu3.2	UNKNOWN
ubuntu	23.10	noarch	amd64-microcode	< 3.20230808.1.1ubuntu1	UNKNOWN
ubuntu	24.04	noarch	amd64-microcode	< 3.20230808.1.1ubuntu1	UNKNOWN
ubuntu	16.04	noarch	amd64-microcode	< 3.20191021.1+really3.20180524.1~ubuntu0.16.04.2+esm2) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	18.04	noarch	linux	< any	UNKNOWN
ubuntu	20.04	noarch	linux	< any	UNKNOWN
ubuntu	22.04	noarch	linux	< 5.15.0-86.96	UNKNOWN