IM
IronMonkey Threat Research

CVE-2019-8263 MEDIUM

Published: 2019-03-05 | Last Modified: 2026-06-17 | Status: Modified

Description

UltraVNC revision 1205 has stack-based buffer overflow vulnerability in VNC client code inside ShowConnInfo routine, which leads to a denial of service (DoS) condition. This attack appear to be exploitable via network connectivity. User interaction is required to trigger this vulnerability. This vulnerability has been fixed in revision 1206.

Additional Descriptions (1)

UltraVNC, en su revisión 1205, tiene un desbordamiento de búfer basado en pila en el código del cliente VNC dentro de la rutina ShowConnInfo, lo cual conduce a una condición de denegación de servicio (DoS). Este ataque parece ser explotable mediante la conectividad de red. Se requiere interacción del usuario para desencadenar esta vulnerabilidad. Esta vulnerabilidad se ha solucionado en la revisión 1206.

CVSS Metrics

Base Score: 6.5 (MEDIUM)

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

Attack VectorNETWORK
Attack ComplexityLOW
Privileges RequiredNONE
User InteractionREQUIRED
ScopeUNCHANGED
Confidentiality ImpactNONE
Integrity ImpactNONE
Availability ImpactHIGH

Source: [email protected]

Type: Primary

Exploitability Score: 2.8

Impact Score: 3.6

Base Score: 4.3 (MEDIUM)

AV:N/AC:M/Au:N/C:N/I:N/A:P

Access VectorNETWORK
Access ComplexityMEDIUM
AuthenticationNONE
Confidentiality ImpactNONE
Integrity ImpactNONE
Availability ImpactPARTIAL

Source: [email protected]

Type: Primary

Exploitability Score: 8.6

Impact Score: 2.9

Weaknesses

Source Type Description
[email protected] Secondary
en CWE-121
[email protected] Primary
en CWE-787

Affected Products

Vendor Product Version Update Type
uvnc ultravnc * <built-in method update of dict object at 0x7e60bafae240> Application
siemens sinumerik_access_mymachine\/p2p * <built-in method update of dict object at 0x7e6110f87400> Application
siemens sinumerik_pcu_base_win10_software\/ipc * <built-in method update of dict object at 0x7e6111c1d740> Application
siemens sinumerik_pcu_base_win7_software\/ipc * <built-in method update of dict object at 0x7e60baa0a580> Application

Affected Configurations

Operator: OR

Vulnerable CPE
Yes cpe:2.3:a:uvnc:ultravnc:*:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
Yes cpe:2.3:a:siemens:sinumerik_access_mymachine\/p2p:*:*:*:*:*:*:*:*
Yes cpe:2.3:a:siemens:sinumerik_pcu_base_win10_software\/ipc:*:*:*:*:*:*:*:*
Yes cpe:2.3:a:siemens:sinumerik_pcu_base_win7_software\/ipc:*:*:*:*:*:*:*:*

References

Notification
Message here