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CVE-2019-15691

Public on 2019-12-26
Modified on 2021-01-13
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.

Severity
Medium
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CVSS v3 Base Score
7.2
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Affected Packages

Platform Package Release Date Advisory
Amazon Linux 1 tigervnc 2021-01-12 22:52 ALAS-2021-1470
Amazon Linux 2 - Core tigervnc 2020-10-22 18:47 ALAS2-2020-1552

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 7.2 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD CVSSv3 7.2 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD CVSSv2 6.5 AV:N/AC:L/Au:S/C:P/I:P/A:P