PT-2019-5271 · Ultravnc · Ultravnc

Published 2019-03-01 · Updated 2020-10-22 · CVE-2019-8276

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions UltraVNC revision 1211

Description The issue is related to a stack buffer overflow in the VNC server code inside the file transfer request handler, which can result in Denial of Service (DoS). This can be exploited via network connectivity.

Recommendations For UltraVNC revision 1211, update to revision 1212 to resolve the issue. As a temporary workaround, consider restricting network connectivity to minimize the risk of exploitation.

Fix

Stack Overflow

Buffer Overflow

Memory Corruption

Weakness Enumeration

CWE-121

CWE-119

CWE-787

Related Identifiers

BDU:2020-02167

CVE-2019-8276

Affected Products

Ultravnc

References · 8

• https://osv.dev/vulnerability/CVE-2019-8276 · Vendor Advisory
• https://bdu.fstec.ru/vul/2020-02167 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2019-8276 · Security Note
• https://download.schneider-electric.com/files?p_enDocType=Technical+leaflet&p_File_Name=SEVD-2019-225-05-TelevisGO_Security_Notification.pdf · Note
• 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 · Note
• https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-023-ultravnc-stack-based-buffer-overflow · Note
• https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf · Note