Integer Overflow or Wraparound Affecting virt:rhel/sgabios package, versions <1:0.20170427git-3.module+el8.6.0+14480+c0a3aa0f


Severity

Recommended
medium

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.07% (33rd percentile)

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  • Snyk IDSNYK-RHEL8-VIRT-4299603
  • published2 Apr 2022
  • disclosed28 Mar 2022

Introduced: 28 Mar 2022

CVE-2021-4206  (opens in a new tab)
CWE-190  (opens in a new tab)
CWE-131  (opens in a new tab)
CWE-120  (opens in a new tab)

How to fix?

Upgrade RHEL:8 virt:rhel/sgabios to version 1:0.20170427git-3.module+el8.6.0+14480+c0a3aa0f or higher.
This issue was patched in RHSA-2022:5821.

NVD Description

Note: Versions mentioned in the description apply only to the upstream virt:rhel/sgabios package and not the virt:rhel/sgabios package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

A flaw was found in the QXL display device emulation in QEMU. An integer overflow in the cursor_alloc() function can lead to the allocation of a small cursor object followed by a subsequent heap-based buffer overflow. This flaw allows a malicious privileged guest user to crash the QEMU process on the host or potentially execute arbitrary code within the context of the QEMU process.

CVSS Scores

version 3.1