CVE-2019-15691

moderate-risk
Published 2019-12-26

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.

Do I need to act?

~
3.7% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.2/10 High
NETWORK / LOW complexity

Affected Products (2)

Affected Vendors

Opensuse Tigervnc

References (8)

Third Party Advisory http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00039.html
Patch https://github.com/CendioOssman/tigervnc/commit/d61a767d6842b530ffb532ddd5a3d233...
Release Notes https://github.com/TigerVNC/tigervnc/releases/tag/v1.10.1
Exploit https://www.openwall.com/lists/oss-security/2019/12/20/2
Third Party Advisory http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00039.html
Patch https://github.com/CendioOssman/tigervnc/commit/d61a767d6842b530ffb532ddd5a3d233...
Release Notes https://github.com/TigerVNC/tigervnc/releases/tag/v1.10.1
Exploit https://www.openwall.com/lists/oss-security/2019/12/20/2
40
/ 100
moderate-risk
Severity 26/34 · High
Exploitability 7/34 · Low
Exposure 7/34 · Low