CVE-2019-8268

UltraVNC revision 1206 has multiple off-by-one vulnerabilities in VNC client code connected with improper usage of ClientConnection::ReadString function, which can potentially result code execution. This attack appears to be exploitable via network connectivity. These vulnerabilities have been fixed in revision 1207.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
KasperskyCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 80%
VendorProductVersion
uvncultravnc
𝑥
< 1.2.2.3
siemenssinumerik_access_mymachine\/p2p
𝑥
< 4.8
siemenssinumerik_pcu_base_win10_software\/ipc
𝑥
< 14.00
siemenssinumerik_pcu_base_win7_software\/ipc
𝑥
≤ 12.01
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf
https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-015-ultravnc-off-by-one-error/
https://www.us-cert.gov/ics/advisories/icsa-20-161-06
https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf
https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-015-ultravnc-off-by-one-error/
https://www.us-cert.gov/ics/advisories/icsa-20-161-06