VulnerabilityModified
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.
MEDIUM 6.5EPSS 2.48%
Does this matter?
Lower severity and a low EPSS score (2.48%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- EPSS
- 2.48% probability · 84th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-121, CWE-787
- Affected
- uvnc/ultravnc · siemens/sinumerik access mymachine\/p2p · siemens/sinumerik pcu base win10 software\/ipc · siemens/sinumerik pcu base win7 software\/ipc
- Source
- vulnerability@kaspersky.com
References
- https://cert-portal.siemens.com/productcert/pdf/ssa-286838.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdfThird Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-940818.pdf
- https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-009-ultravnc-access-of-memory-location-after-end-of-buffer/Not Applicable, Third Party Advisory
- https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-010-ultravnc-stack-based-buffer-overflow/Third Party Advisory
- https://us-cert.cisa.gov/ics/advisories/icsa-21-131-11
- https://www.us-cert.gov/ics/advisories/icsa-20-161-06Third Party Advisory, US Government Resource
- https://cert-portal.siemens.com/productcert/pdf/ssa-286838.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdfThird Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-940818.pdf
- https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-009-ultravnc-access-of-memory-location-after-end-of-buffer/Not Applicable, Third Party Advisory
- https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-010-ultravnc-stack-based-buffer-overflow/Third Party Advisory
- https://us-cert.cisa.gov/ics/advisories/icsa-21-131-11
- https://www.us-cert.gov/ics/advisories/icsa-20-161-06Third Party Advisory, US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.