PT-2020-1636 · Linux+4 · Linux Kernel+4

Boris Ostrovsky · Published 2020-01-30 · Updated 2024-06-15 · CVE-2019-3016

Positive Technologies (AI Summary)

CVSS v3.1

6.2

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel versions 4.10 (host) with 4.16 or later (guest)

Description The issue is related to the Kernel-based Virtual Machine (KVM) subsystem in Linux, specifically with simultaneous execution using a shared resource with incorrect synchronization. This allows an attacker to access confidential data. The problem mainly affects AMD processors but Intel CPUs cannot be ruled out.

Recommendations For Linux kernel version 4.10 (host) with 4.16 or later (guest), consider disabling PV TLB in the guest kernel as a temporary workaround until a patch is available. Restrict access to sensitive data in the guest kernel to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Information Disclosure

Race Condition

Weakness Enumeration

CWE-200

CWE-362

Related Identifiers

ALT-PU-2020-1204

ALT-PU-2020-1219

ALT-PU-2020-1398

ALT-PU-2020-1501

ALT-PU-2020-1524

ALT-PU-2020-1945

ALT-PU-2020-3057

ALT-PU-2021-1745

AZL-34852

AZL-6519

BDU:2020-00851

CESA-2020_3010

CESA-2020_3016

CVE-2019-3016

DSA-4699-1

LSN-0065-1

MGASA-2020-0073

MGASA-2020-0089

OPENSUSE-SU-2024:10728-1

OPENSUSE-SU-2024:13704-1

RHSA-2020:3010

RHSA-2020:3016

RHSA-2020_3010

RHSA-2020_3016

USN-4300-1

USN-4301-1

Affected Products

Alt Linux

Centos

Linux Kernel

Red Hat

Ubuntu

References · 300

• 🔥 https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19377 · Exploit
• 🔥 https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19039 · Exploit
• 🔥 https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19448 · Exploit
• 🔥 https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19036 · Exploit
• 🔥 https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19816 · Exploit
• 🔥 https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19037 · Exploit
• 🔥 https://github.com/cgwalters/cve-2020-14386 · Exploit
• 🔥 https://github.com/sasqwatch/cve-2019-11477-poc · Exploit
• 🔥 https://github.com/Limesss/cve-2019-18683 · Exploit
• 🔥 https://github.com/bobfuzzer/CVE-2019-18885 · Exploit
• https://debian.org/security/2020/dsa-4699 · Vendor Advisory
• https://osv.dev/vulnerability/AZL-6519 · Vendor Advisory
• https://osv.dev/vulnerability/LSN-0065-1 · Vendor Advisory
• https://git.kernel.org/linus/1eff70a9abd46f175defafd29bc17ad456f398a7 · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2020-0073 · Vendor Advisory