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LIN1019-3877 : Security Advisory - tigervnc - CVE-2019-15691

Created: Dec 31, 2019    Updated: Feb 21, 2020
Resolved Date: Jan 21, 2020
Found In Version: 10.19.45.1
Fix Version: 10.19.45.4
Severity: Standard
Applicable for: Wind River Linux LTS 19
Component/s: Userspace

Description

TigerVNC version prior to 1.10.1 is vulnerable to stack use-after-return, which occurs due to incorrect usage of stack memory in ZRLEDecoder. If decoding routine would throw an exception, ZRLEDecoder may try to access stack variable, which has been already freed during the process of stack unwinding. Exploitation of this vulnerability could potentially result into remote code execution. This attack appear to be exploitable via network connectivity.

CREATE(Triage):(User=admin) [CVE-2019-15691|https://nvd.nist.gov/vuln/detail/CVE-2019-15691]

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