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CVE-2019-8263

MEDIUM
6.5
CVSS Score
Published: March 5, 2019 at 03:00 PM UTC
Updated: June 17, 2026 at 02:41 AM UTC
4 products affected across 2 vendorsUltraVNCSinumerik Pcu Base WIN10 Software /ipcSinumerik Access Mymachine /p2p

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Severity
MEDIUM6.5
Exploit prediction
EPSS 2%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Sinumerik Access Mymachine /p2p· Siemens
95%
v < 4.8
Affected range stops below 4.8, so it looks safe — our inference, not a vendor statement
Sinumerik Pcu Base WIN10 Software /ipc· Siemens
95%
v < 14.00
Affected range stops below 14.00, so it looks safe — our inference, not a vendor statement
Sinumerik Pcu Base WIN7 Software /ipc· Siemens
95%
v ≤ 12.01
UltraVNC· Uvnc
95%
v < 1.2.2.31.2.2.3
Affected range stops below 1.2.2.3, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (7)

x_refsource_CONFIRM
Source: [email protected]
https://cert-portal.siemens.com/productcert/pdf/ssa-286838.pdf
x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf
x_refsource_CONFIRM
Source: [email protected]
https://cert-portal.siemens.com/productcert/pdf/ssa-940818.pdf
x_refsource_MISCNot ApplicableThird Party Advisory
Source: [email protected]
https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-009-ultravnc-access-of-memory-location-after-end-of-buffer/
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-010-ultravnc-stack-based-buffer-overflow/
x_refsource_MISC
Source: [email protected]
https://us-cert.cisa.gov/ics/advisories/icsa-21-131-11
x_refsource_MISCThird Party AdvisoryUS Government Resource
Source: [email protected]
https://www.us-cert.gov/ics/advisories/icsa-20-161-06

CVSS

6.5MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-121CWE-787

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