CVE-2022-3165
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Insights vulnerability analysis
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.
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).
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).
Red Hat | NVD | |
---|---|---|
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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