Description
UltraVNC revision 1199 has a out-of-bounds read vulnerability in VNC code inside client CoRRE decoder, caused by multiplication overflow. This attack appears to be exploitable via network connectivity. This vulnerability has been fixed in revision 1200.
References (6)
Core 6
Core References
Third Party Advisory x_refsource_misc
https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-007-ultravnc-out-of-bound-read/
Vendor Advisory x_refsource_confirm
https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf
Various Sources x_refsource_misc
https://www.us-cert.gov/ics/advisories/icsa-20-161-06
Vendor Advisory x_refsource_confirm
https://cert-portal.siemens.com/productcert/pdf/ssa-940818.pdf
Vendor Advisory x_refsource_confirm
https://cert-portal.siemens.com/productcert/pdf/ssa-286838.pdf
Third Party Advisory, US Government Resource x_refsource_misc
https://us-cert.cisa.gov/ics/advisories/icsa-21-131-11
Scores
CVSS v3
9.8
EPSS
0.0098
EPSS Percentile
77.0%
Attack Vector
NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-125
Status
published
Products (1)
uvnc/ultravnc
< 1.2.2.3
Published
Mar 05, 2019
Tracked Since
Feb 18, 2026