PT-2019-5951 · Ultravnc · Ultravnc

Published 2019-03-05 · Updated 2021-06-28 · CVE-2019-8263

Positive Technologies (AI Summary)

CVSS v2.0

7.1

High

Base vector

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

Name of the Vulnerable Software and Affected Versions UltraVNC revision 1205

Description The issue is related to a stack-based buffer overflow in the VNC client code inside the ShowConnInfo routine. This can lead to a denial of service (DoS) condition. The attack appears to be exploitable via network connectivity and requires user interaction to be triggered.

Recommendations For UltraVNC revision 1205, update to revision 1206 to resolve the issue.

Fix

Stack Overflow

Memory Corruption

Weakness Enumeration

CWE-121

CWE-787

Related Identifiers

BDU:2021-03843

CVE-2019-8263

Affected Products

Ultravnc

References · 10

• https://bdu.fstec.ru/vul/2021-03843 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2019-8263 · Security Note
• https://osv.dev/vulnerability/CVE-2019-8263 · Vendor Advisory
• https://cert-portal.siemens.com/productcert/pdf/ssa-940818.pdf · Note
• https://us-cert.cisa.gov/ics/advisories/icsa-21-131-11 · Note
• https://cert-portal.siemens.com/productcert/pdf/ssa-286838.pdf · Note
• https://us-cert.gov/ics/advisories/icsa-20-161-06 · Note
• https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-009-ultravnc-access-of-memory-location-after-end-of-buffer · Note
• https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-010-ultravnc-stack-based-buffer-overflow · Note
• https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf · Note