KLCERT-18-032: LibVNC Multiple Memory Leaks

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Advisories
KLCERT-18-032: LibVNC Multiple Memory Leaks

19 December 2018

Vendor

LibVNC

CVE-IDS

2018-20022
KLCERT

KLCERT-18-032

Timeline

Kaspersky ICS CERT advisory published

19 December 2018
Vendor advisory published

December 2018
Vendor releases patch

September 2018
Vulnerabilities reported

September 2018

Description

LibVNC before 2f5b2ad1c6c99b1ac6482c95844a84d66bb52838 contains multiple CWE-665: Improper Initialization weaknesses in VNC client code, which could 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 layout and bypass ASLR. This vulnerability has been fixed in 2f5b2ad1c6c99b1ac6482c95844a84d66bb52838 and later.

CVSS v3

0.0

(CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N)

Exploitability

Remotely

Attack complexity

Low

User interaction

None

Impact

Successful exploitation of this vulnerability could allow an attacker to cause information disclosure and expand attack vectors.

Existence of exploit

Unknown

Affected products

LibVNC before commit 2f5b2ad1c6c99b1ac6482c95844a84d66bb52838

Mitigation

Vendor mitigation

Update LibVNC to 0.9.12

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.

Timeline

Kaspersky ICS CERT advisory published

19 December 2018
Vendor advisory published

December 2018
Vendor releases patch

September 2018
Vulnerabilities reported

September 2018