CVE-2019-8266 - UltraVNC revision 1207 has multiple out-of-bounds access vulnerabilities connected with improper usage of ClientConnection::Copybuffer function in VNC client code, which can potentially result in code execution

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CRITICAL

UltraVNC revision 1207 has multiple out-of-bounds access vulnerabilities connected with improper usage of ClientConnection::Copybuffer function in VNC client code, which can potentially result in code execution

Published Mar 9, 2019

9.8

CRITICAL

CVSS 3.0

EPSS 2.84%

Description

UltraVNC revision 1207 has multiple out-of-bounds access vulnerabilities connected with improper usage of ClientConnection::Copybuffer function in VNC client code, which can potentially result in code execution. This attack appears to be exploitable via network connectivity. User interaction is required to trigger these vulnerabilities. These vulnerabilities have been fixed in revision 1208.

Affected products

Vendor Kaspersky Lab Product UltraVNC Default
n/a
- Version
  1.2.2.3
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Kaspersky Lab

UltraVNC

n/a

Version	Status	Constraints
1.2.2.3	affected	-

Remediation

No remediation recorded yet.

Weaknesses (3)

CWE-125

Out-of-bounds Read

CWE-787

Out-of-bounds Write

CWE-788

References (4)

https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf
x_refsource_CONFIRM
https://euvd.enisa.europa.eu/vulnerability/EUVD-2019-17664
Advisory
https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-013-ultravnc-access-of-memory-location-after-end-of-buffer/
x_refsource_MISCThird Party Advisory
https://www.us-cert.gov/ics/advisories/icsa-20-161-06
x_refsource_MISC

Link	Providers	Tags
https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf		x_refsource_CONFIRM
https://euvd.enisa.europa.eu/vulnerability/EUVD-2019-17664		Advisory
https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-013-ultravnc-access-of-memory-location-after-end-of-buffer/		x_refsource_MISCThird Party Advisory
https://www.us-cert.gov/ics/advisories/icsa-20-161-06		x_refsource_MISC