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 (4)
Core 4
Core References
Patch, Third Party Advisory x_refsource_misc
https://github.com/CendioOssman/tigervnc/commit/d61a767d6842b530ffb532ddd5a3d233119aad40
Release Notes, Third Party Advisory x_refsource_misc
https://github.com/TigerVNC/tigervnc/releases/tag/v1.10.1
Exploit, Mailing List, Third Party Advisory mailing-list
x_refsource_mlist
https://www.openwall.com/lists/oss-security/2019/12/20/2
Third Party Advisory vendor-advisory
x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00039.html
Scores
CVSS v3
7.2
EPSS
0.0472
EPSS Percentile
90.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-825
CWE-672
Status
published
Products (2)
opensuse/leap
15.1
tigervnc/tigervnc
< 1.10.1
Published
Dec 26, 2019
Tracked Since
Feb 18, 2026