CVE-2022-3165

QEMU: VNC: integer underflow in vnc_client_cut_text_ext leads to CPU exhaustion

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An integer underflow issue was found in the QEMU 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.

Se ha encontrado un problema de desbordamiento de enteros en el servidor VNC de QEMU mientras son procesados mensajes ClientCutText en el formato extendido. Un cliente malicioso podría usar este fallo para hacer que QEMU no responda mediante el envío de un mensaje de carga útil especialmente diseñado, resultando en una denegación de servicio

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.

*Credits: N/A

CVSS Scores

NISTv3.1 6.5

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2022-09-08 CVE Reserved
2022-10-17 CVE Published
2024-06-07 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-191: Integer Underflow (Wrap or Wraparound)
CWE-400: Uncontrolled Resource Consumption

CAPEC

References (6)

URL	Tag	Source
https://security.netapp.com/advisory/ntap-20221223-0006	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
https://gitlab.com/qemu-project/qemu/-/commit/d307040b18	2023-11-07

URL	Date	SRC
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I36LKZA7Z65J3LJU2P37LVTWDFTXBMPU	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZTY7TVHX62OJWF6IOBCIGLR2N5K4QN3E	2023-11-07
https://access.redhat.com/security/cve/CVE-2022-3165	2023-05-16
https://bugzilla.redhat.com/show_bug.cgi?id=2129739	2023-05-16

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Qemu Search vendor "Qemu"		Qemu Search vendor "Qemu" for product "Qemu"				>= 6.1.0 <= 7.1.0 Search vendor "Qemu" for product "Qemu" and version " >= 6.1.0 <= 7.1.0"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				36 Search vendor "Fedoraproject" for product "Fedora" and version "36"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				37 Search vendor "Fedoraproject" for product "Fedora" and version "37"		-		Affected