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KLCERT-20-009: Remote Code Execution on LibVNC version prior to 0.9.12

Kaspersky publishes information on newly identified vulnerabilities in order to raise user awareness of the IT security threats detected. Kaspersky does not make any guarantees in respect of information received from vendors of products in which vulnerabilities have been identified, which is included in the following sections of the advisory: Affected Products, Vendor Mitigation.

KL-IDS KLCERT-20-009
CVE-IDS CVE-2019-15690
Publication date 2020.03.23
Researcher Pavel Cheremushkin, Kaspersky ICS CERT
Description LibVNC client code contains heap buffer overflow vulnerability in commit prior to 6073771eed1caf72f196e410182471e0dfd32149. This could possible result into remote code execution. This attack appear to be exploitable via network connectivity. The issue has been fixed in commit 54220248886b5001fbbb9fa73c4e1a2cb9413fed.
Impact Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code.
Severity
CVSS v3 Base Score: 8.8
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Exploitability Remotely
Difficulty Low
User interaction None
Existence of exploit Unknown
Affected products
Affected products LibVNC client commit prior to 6073771eed1caf72f196e410182471e0dfd32149
Mitigation
Vendor mitigation Update current version of LibVNC client.
Timeline Dec 2019 – Vulnerabilities reported
Dec 2019 – Vendor releases patch
Dec 2019 – Advisory published