CVE-2019-8268

CRITICAL

UltraVNC < 1.2.2.3 - Remote Code Execution via ClientConnection::ReadString Off-by-one Error

Title source: llm
STIX 2.1

Description

UltraVNC revision 1206 has multiple off-by-one vulnerabilities in VNC client code connected with improper usage of ClientConnection::ReadString function, which can potentially result code execution. This attack appears to be exploitable via network connectivity. These vulnerabilities have been fixed in revision 1207.

References (3)

Core 3
Core References
Third Party Advisory x_refsource_confirm
https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf
Third Party Advisory, US Government Resource x_refsource_misc
https://www.us-cert.gov/ics/advisories/icsa-20-161-06

Scores

CVSS v3 9.8
EPSS 0.0392
EPSS Percentile 88.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-193
Status published
Products (4)
siemens/sinumerik_access_mymachine\/p2p < 4.8
siemens/sinumerik_pcu_base_win10_software\/ipc < 14.00
siemens/sinumerik_pcu_base_win7_software\/ipc < 12.01
uvnc/ultravnc < 1.2.2.3
Published Mar 08, 2019
Tracked Since Feb 18, 2026