CVE-2019-8263
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 2.5%
exploitation probability
2.5%top 17% of all CVEs
observed exploitation
nono source reports it
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.
Affected products
Kaspersky Lab · UltraVNCReferences
https://cert-portal.siemens.com/productcert/pdf/ssa-286838.pdfhttps://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdfhttps://cert-portal.siemens.com/productcert/pdf/ssa-940818.pdfhttps://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://us-cert.cisa.gov/ics/advisories/icsa-21-131-11https://www.us-cert.gov/ics/advisories/icsa-20-161-06