CVE-2019-8259

moderate-risk
Published 2019-03-05

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.

Do I need to act?

-
0.82% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10 High
NETWORK / LOW complexity

Affected Products (4)

Sinumerik Access Mymachine\/P2P
Sinumerik Pcu Base Win10 Software\/Ipc
Sinumerik Pcu Base Win7 Software\/Ipc

Affected Vendors

Siemens Uvnc

References (12)

https://cert-portal.siemens.com/productcert/pdf/ssa-286838.pdf
Third Party Advisory https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf
https://cert-portal.siemens.com/productcert/pdf/ssa-940818.pdf
Third Party Advisory https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19...
https://us-cert.cisa.gov/ics/advisories/icsa-21-131-11
Third Party Advisory https://www.us-cert.gov/ics/advisories/icsa-20-161-06
https://cert-portal.siemens.com/productcert/pdf/ssa-286838.pdf
Third Party Advisory https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf
https://cert-portal.siemens.com/productcert/pdf/ssa-940818.pdf
Third Party Advisory https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19...
https://us-cert.cisa.gov/ics/advisories/icsa-21-131-11
Third Party Advisory https://www.us-cert.gov/ics/advisories/icsa-20-161-06
39
/ 100
moderate-risk
Severity 26/34 · High
Exploitability 3/34 · Minimal
Exposure 10/34 · Low