What’s Vulnerable › Vulnerabilities
CVE-2019-8275
- Severity: critical (CVSS 9.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 4.0% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2019-03-08 · updated 2026-06-17
- Weakness: CWE-170
Description
UltraVNC revision 1211 has multiple improper null termination vulnerabilities in VNC server code, which result in out-of-bound data being accessed by remote users. This attack appears to be exploitable via network connectivity. These vulnerabilities have been fixed in revision 1212.
Affected products
- Siemens Sinumerik Access Mymachine/P2P: before 4.8 — fixed in 4.8
- Siemens Sinumerik Pcu Base Win10 Software/Ipc: before 14.00 — fixed in 14.00
- Siemens Sinumerik Pcu Base Win7 Software/Ipc: through 12.01
- Kaspersky Lab UltraVNC: before 1.2.2.3 — fixed in 1.2.2.3
How to fix
Upgrade to a fixed version: Siemens Sinumerik Access Mymachine/P2P 4.8; Siemens Sinumerik Pcu Base Win10 Software/Ipc 14.00; Kaspersky Lab UltraVNC 1.2.2.3. Check the vendor advisory for mitigations.
References
- https://cert-portal.siemens.com/productcert/pdf/ssa-286838.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-940818.pdf
- https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-022-ultravnc-improper-null-termination/
- https://us-cert.cisa.gov/ics/advisories/icsa-21-131-11
- https://www.us-cert.gov/ics/advisories/icsa-20-161-06
- https://cert-portal.siemens.com/productcert/pdf/ssa-286838.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-940818.pdf
- https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-022-ultravnc-improper-null-termination/
- https://us-cert.cisa.gov/ics/advisories/icsa-21-131-11
- https://www.us-cert.gov/ics/advisories/icsa-20-161-06
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