CVE-2019-20840

moderate-risk
Published 2020-06-17

An issue was discovered in LibVNCServer before 0.9.13. libvncserver/ws_decode.c can lead to a crash because of unaligned accesses in hybiReadAndDecode.

Do I need to act?

~
2.0% 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 7.5/10 High
NETWORK / LOW complexity

Affected Products (16)

Affected Vendors

Debian Siemens Canonical Opensuse Libvnc Project

References (16)

Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00033.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00055.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00066.html
Patch https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdf
Patch https://github.com/LibVNC/libvncserver/commit/0cf1400c61850065de590d403f6d49e328...
Release Notes https://github.com/LibVNC/libvncserver/compare/LibVNCServer-0.9.12...LibVNCServe...
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...
Third Party Advisory https://usn.ubuntu.com/4434-1/
Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00033.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00055.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00066.html
Patch https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdf
Patch https://github.com/LibVNC/libvncserver/commit/0cf1400c61850065de590d403f6d49e328...
Release Notes https://github.com/LibVNC/libvncserver/compare/LibVNCServer-0.9.12...LibVNCServe...
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...
Third Party Advisory https://usn.ubuntu.com/4434-1/
49
/ 100
moderate-risk
Severity 26/34 · High
Exploitability 5/34 · Minimal
Exposure 18/34 · Moderate