High severity · published Jun 17, 2020
CVE-2019-20840
An issue was discovered in LibVNCServer before 0.9.13
7.5
CVSS
2.7%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.7% · higher than 86% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
8.0; 9.0 · source: NVD
LE
Leap · Opensuse
15.2 · source: NVD
LI
Libvncserver · Libvnc Project
through 0.9.12 · source: NVD
SI
Simatic Itc1500 Firmware · Siemens
3.0.0.0 before 3.2.1.0 · source: NVD
SI
Simatic Itc1500 Pro Firmware · Siemens
3.0.0.0 before 3.2.1.0 · source: NVD
SI
Simatic Itc1900 Firmware · Siemens
3.0.0.0 before 3.2.1.0 · source: NVD
SI
Simatic Itc1900 Pro Firmware · Siemens
3.0.0.0 before 3.2.1.0 · source: NVD
SI
Simatic Itc2200 Firmware · Siemens
3.0.0.0 before 3.2.1.0 · source: NVD
SI
Simatic Itc2200 Pro Firmware · Siemens
3.0.0.0 before 3.2.1.0 · source: NVD
UL
Ubuntu Linux · Canonical
14.04; 16.04; 16.04; 18.04; 18.10; 20.04 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-20840
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-20840
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/0cf1400c61850065de590d403f6d49e32882fd76
Release Notes
https://github.com/LibVNC/libvncserver/compare/LibVNCServer-0.9.12...LibVNCServer-0.9.13
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