01 March 2019

KLCERT-19-024: UltraVNC Improper Initialization

Vendor

UltraVNC

Timeline

Timeline

  • Kaspersky ICS CERT advisory updated

    02 November 2023

  • Kaspersky ICS CERT advisory published

    01 March 2019

  • Vendor advisory published

    01 March 2019

  • Vulnerabilities reported

    06 February 2019

Description

UltraVNC before 1.2.2.4 contains multiple memory leaks (CWE-665) in VNC server code, which allow an attacker to read stack memory and can be abused for information disclosure.

CVSS v3

0.0

 (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C)

Exploitability

Remotely

Attack complexity

Low

User interaction

None

Attack сonditions

The security vulnerability could be exploited by an attacker with network access to the affected systems. Successful exploitation requires user be logged in to the server.

Impact

Successful exploitation of this vulnerability could allow an attacker to cause memory information disclosure and bypass ASLR.

Existence of exploit

PoC

Affected products

UltraVNC before 1.2.2.4

Mitigation

Vendor mitigation

Update UltraVNC to 1.2.2.4 or newer

Kaspersky Lab publishes information on newly identified vulnerabilities in order to raise user awareness of the IT security threats detected. Kaspersky Lab 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.

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Timeline

  • Kaspersky ICS CERT advisory updated

    02 November 2023

  • Kaspersky ICS CERT advisory published

    01 March 2019

  • Vendor advisory published

    01 March 2019

  • Vulnerabilities reported

    06 February 2019

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