CVE Vulnerability

CVE-2019-8268

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.

7.5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 6.4

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

Scope

9.8 /10

CVSS v3.0 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-015-ultravnc-off-by-one-error/ Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf Third Party Advisory
https://www.us-cert.gov/ics/advisories/icsa-20-161-06 Third Party Advisory US Government Resource
Configurations

Configuration 1

cpe:2.3:a:uvnc:ultravnc:*:*:*:*:*:*:*:*
cpe:2.3:a:siemens:sinumerik_pcu_base_win7_software/ipc:*:*:*:*:*:*:*:*
cpe:2.3:a:siemens:sinumerik_pcu_base_win10_software/ipc:*:*:*:*:*:*:*:*
cpe:2.3:a:siemens:sinumerik_access_mymachine/p2p:*:*:*:*:*:*:*:*
Information

Published : 2019-03-08 11:29

Updated : 2020-10-19 05:56

NVD link : CVE-2019-8268

Mitre link : CVE-2019-8268

Products Affected
No products.
CWE
CWE-193

Off-by-one Error