CVE-2019-8268 — Off-by-one Error in Ultravnc

CWE-193 — Off-by-one Error3 documents3 sources
Severity
9.8CRITICALNVD
EPSS
1.4%
top 19.53%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
5
Siemens Sinumerik Access Mymachine P2PSiemens Sinumerik PCU Base Win10 Software IPCUvnc Ultravnc+2 more
Timeline
PublishedMar 8
Latest updateMay 13

Description

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 3.9 | Impact: 5.9

Affected Packages5 packages

▶NVDuvnc/ultravnc< 1.2.2.3
▶CVEListV5kaspersky_lab/ultravnc1.2.2.3

🔴Vulnerability Details

1
GHSA
GHSA-h835-4p8w-83c9: UltraVNC revision 1206 has multiple off-by-one vulnerabilities in VNC client code connected with improper usage of ClientConnection::ReadString functi↗2022-05-13
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📋Vendor Advisories

1
CISA ICS
Siemens SINUMERIK↗2020-06-12
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