CVE-2019-8263: kaspersky lab ultravnc Stack-based Buffer Overflow
Vulnerability summary
CVE-2019-8263 is a medium (CVSS 6.5) Stack-based Buffer Overflow vulnerability in kaspersky lab ultravnc. EPSS estimates a 2.48% chance of exploitation in the next 30 days, higher than 84.3% of scored vulnerabilities.
Timeline
- 05-03-2019PublishedVulnerability first disclosed.
- 16-09-2024Last modifiedVulnerability information updated.
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 metrics
2 scores · 1 source · 2 versionsEPSS trend
Probability
2.48%
Chance of exploitation in the next 30 days
Percentile
84%
Versus all other CVEs
30-day change
0.00 pp
From 2.48% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-121Stack-based Buffer OverflowA stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
- CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.
Affected systems
3 vendors · 5 products
References
7 links- www.us-cert.gov/ics/advisories/icsa-20-161-06X Refsource MISCThird Party AdvisoryUS Government Resource
- cert-portal.siemens.com/productcert/pdf/ssa-940818.pdfX Refsource CONFIRM
- cert-portal.siemens.com/productcert/pdf/ssa-286838.pdfX Refsource CONFIRM
us-cert.cisa.gov/ics/advisories/icsa-21-131-11X Refsource MISC