PT-2020-10776 · Qemu+1 · Qemu+1

Published 2019-12-10 · Updated 2021-03-31 · CVE-2019-20808

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions QEMU version 4.1.0

Description The issue is an out-of-bounds read flaw in the ATI VGA implementation. It occurs in the ati cursor define() routine while handling MMIO write operations through the ati mm write() callback. A malicious guest could abuse this flaw to crash the QEMU process, resulting in a denial of service.

Recommendations For QEMU version 4.1.0, as a temporary workaround, consider disabling the ati cursor define() function until a patch is available. Restrict access to the ATI VGA implementation to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

ALT-PU-2019-3257

ALT-PU-2019-3286

CVE-2019-20808

OESA-2021-1072

Affected Products

Alt Linux

Qemu

References · 17

• https://osv.dev/vulnerability/UBUNTU-CVE-2019-20808 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-20808 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2020-13754 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2019-20808 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2019-20808 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2021-9109.html · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-17380 · Security Note
• https://osv.dev/vulnerability/CVE-2019-20808 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-20808 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2019-20808 · Security Note
• https://linux.oracle.com/errata/ELSA-2021-9104.html · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2021-1072 · Vendor Advisory
• https://t.me/cibsecurity/21447 · Telegram Post
• https://security.netapp.com/advisory/ntap-20210205-0003 · Note
• https://openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2021-1072 · Note