CVE-2019-8262 — Heap-based Buffer Overflow in Ultravnc

CWE-122 — Heap-based Buffer OverflowCWE-787 — Out-of-bounds Write5 documents3 sources
Severity
9.8CRITICALNVD
EPSS
5.4%
top 9.86%
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 5
Latest updateMay 13

Description

UltraVNC revision 1203 has multiple heap buffer overflow vulnerabilities in VNC client code inside Ultra decoder, which results in code execution. This attack appears to be exploitable via network connectivity. These vulnerabilities have been fixed in revision 1204.

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
▶CVEListV5ultravnc/ultravnc1.2.2.3

🔴Vulnerability Details

1
GHSA
GHSA-28h7-jgqq-qp89: UltraVNC revision 1203 has multiple heap buffer overflow vulnerabilities in VNC client code inside Ultra decoder, which results in code execution↗2022-05-13
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📋Vendor Advisories

3
CISA ICS
Siemens SIMATIC UltraVNC HMI WinCC Products↗2021-05-11
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CISA ICS
Siemens SINAMICS Medium Voltage Products Remote Access (Update B)↗2021-05-11
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CISA ICS
Siemens SINUMERIK↗2020-06-12
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