CVE-2019-8263

UltraVNC revision 1205 has stack-based buffer overflow vulnerability in VNC client code inside ShowConnInfo routine, which leads to a denial of service (DoS) condition. This attack appear to be exploitable via network connectivity. User interaction is required to trigger this vulnerability. This vulnerability has been fixed in revision 1206.

References

https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-009-ultravnc-access-of-memory-location-after-end-of-buffer/

https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-010-ultravnc-stack-based-buffer-overflow/

https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf

https://www.us-cert.gov/ics/advisories/icsa-20-161-06

https://cert-portal.siemens.com/productcert/pdf/ssa-940818.pdf

https://cert-portal.siemens.com/productcert/pdf/ssa-286838.pdf

https://us-cert.cisa.gov/ics/advisories/icsa-21-131-11