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CVE-2019-8259

HIGH
7.5
CVSS Score
Published: March 5, 2019 at 03:00 PM UTC
Updated: June 17, 2026 at 02:41 AM UTC
5 products affected across 3 vendorsUltraVNCSinumerik Pcu Base WIN10 Software /ipcSinumerik Access Mymachine /p2p

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Severity
HIGH7.5
Exploit prediction
EPSS 3%

Description

UltraVNC revision 1198 contains multiple memory leaks (CWE-655) in VNC client code, which allow an attacker to read stack memory and can be abused for information disclosure. Combined with another vulnerability, it can be used to leak stack memory and bypass ASLR. This attack appears to be exploitable via network connectivity. These vulnerabilities have been fixed in revision 1199.

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 < 1.2.2.3
Affected range stops below 1.2.2.3, so it looks safe — our inference, not a vendor statement
UltraVNC· Ultravnc
60%
1.2.2.3

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 (6)

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_MISCThird Party Advisory
Source: [email protected]
https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-005-ultravnc-memory-leak/
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

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-665CWE-401

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