CVE-2019-15691

high

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.

References

https://github.com/TigerVNC/tigervnc/releases/tag/v1.10.1

https://github.com/CendioOssman/tigervnc/commit/d61a767d6842b530ffb532ddd5a3d233119aad40

https://www.openwall.com/lists/oss-security/2019/12/20/2

http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00039.html

Details

Source: MITRE

Published: 2019-12-26

Updated: 2022-11-09

Type: CWE-672

Risk Information

CVSS v2

Base Score: 6.5

Vector: AV:N/AC:L/Au:S/C:P/I:P/A:P

Impact Score: 6.4

Exploitability Score: 8

Severity: MEDIUM

CVSS v3

Base Score: 7.2

Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Impact Score: 5.9

Exploitability Score: 1.2

Severity: HIGH