CVE-2022-3165

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Last Modified: UTC

ModerateModerate ImpactWhat does this mean?

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Description

An integer underflow issue was found in the QEMU built-in VNC server while processing ClientCutText messages in the extended format. A malicious client could use this flaw to make QEMU unresponsive by sending a specially crafted payload message, resulting in a denial of service.

An integer underflow issue was found in the QEMU built-in VNC server while processing ClientCutText messages in the extended format. A malicious client could use this flaw to make QEMU unresponsive by sending a specially crafted payload message, resulting in a denial of service.

Statement

Red Hat Enterprise Linux 6, 7 and RHEL Advanced Virtualization are not affected by this flaw as they did not include support for the extended clipboard pseudo-encoding (upstream commit 0bf41cab).

Red Hat Enterprise Linux 6, 7 and RHEL Advanced Virtualization are not affected by this flaw as they did not include support for the extended clipboard pseudo-encoding (upstream commit 0bf41cab).

Additional information

  • Bugzilla 2129739: QEMU: VNC: integer underflow in vnc_client_cut_text_ext leads to CPU exhaustion
  • CWE-191->CWE-400: Integer Underflow (Wrap or Wraparound) leads to Uncontrolled Resource Consumption
  • FAQ: Frequently asked questions about CVE-2022-3165

Common Vulnerability Scoring System (CVSS) Score Details

Important note

CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).

CVSS v3 Score Breakdown
Red HatNVD

CVSS v3 Base Score

6.5

6.5

Attack Vector

Network

Network

Attack Complexity

Low

Low

Privileges Required

Low

Low

User Interaction

None

None

Scope

Unchanged

Unchanged

Confidentiality Impact

None

None

Integrity Impact

None

None

Availability Impact

High

High

CVSS v3 Vector

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

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

Acknowledgements

Red Hat would like to thank TangPeng (Reddrip of Legendsec at Qi'anxin Group) for reporting this issue.

Frequently Asked Questions

Why is Red Hat's CVSS v3 score or Impact different from other vendors?

My product is listed as "Under investigation" or "Affected", when will Red Hat release a fix for this vulnerability?

What can I do if my product is listed as "Will not fix"?

What can I do if my product is listed as "Fix deferred"?

What is a mitigation?

I have a Red Hat product but it is not in the above list, is it affected?

Why is my security scanner reporting my product as vulnerable to this vulnerability even though my product version is fixed or not affected?

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