PT-2019-4932 · Ultravnc · Ultravnc

Published 2019-03-05 · Updated 2020-10-19 · CVE-2019-8258

Positive Technologies (AI Summary)

CVSS v3.1

10

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions UltraVNC versions prior to revision 1199

Description The issue is related to a heap buffer overflow in the VNC client code, which can be exploited by a remote attacker to execute arbitrary code. The exploitation of this issue is possible via network connectivity.

Recommendations For versions prior to revision 1199, update to revision 1199 or later to resolve the issue. As a temporary workaround, consider restricting network connectivity to minimize the risk of exploitation.

Fix

Buffer Overflow

Memory Corruption

Heap Based Buffer Overflow

Weakness Enumeration

CWE-119

CWE-787

CWE-122

Related Identifiers

BDU:2020-01540

CVE-2019-8258

Affected Products

Ultravnc

References · 8

• https://bdu.fstec.ru/vul/2020-01540 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2019-8258 · Security Note
• https://osv.dev/vulnerability/CVE-2019-8258 · Vendor Advisory
• https://us-cert.gov/ics/advisories/icsa-20-161-06 · Note
• https://download.schneider-electric.com/files?p_enDocType=Technical+leaflet&p_File_Name=SEVD-2019-225-05-TelevisGO_Security_Notification.pdf&p_Doc_Ref=SEVD-2019-225-05 · Note
• https://download.schneider-electric.com/files?p_enDocType=Technical+leaflet&p_File_Name=SEVD-2019-225-05-TelevisGO_Security_Notification.pdf&p_Doc_Ref=SEVD-2019-225-05 · Note
• https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf · Note
• https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-004-ultravnc-heap-based-buffer-overflow · Note