Critical severity · published Apr 23, 2020
CVE-2019-20788
libvncclient/cursor.c in LibVNCServer through 0.9.12 has a HandleCursorShape integer overflow and heap-based buffer overflow via a large height or width value
9.8
CVSS
2.5%
EPSS
No
On KEV
Description
libvncclient/cursor.c in LibVNCServer through 0.9.12 has a HandleCursorShape integer overflow and heap-based buffer overflow via a large height or width value. NOTE: this may overlap CVE-2019-15690.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.5% · higher than 85% 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
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 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-20788
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-20788
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00027.html
Patch
https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdf
Patch
https://github.com/LibVNC/libvncserver/commit/54220248886b5001fbbb9fa73c4e1a2cb9413fed
Exploit
https://securitylab.github.com/advisories/GHSL-2020-064-libvnc-libvncclient
Third Party Advisory
https://usn.ubuntu.com/4407-1/
More from Ubuntu Linux
9.8
CVE-2020-11651
SaltStack Salt Authentication Bypass Vulnerability
9.8
CVE-2020-7247
OpenSMTPD Remote Code Execution Vulnerability
9.8
CVE-2019-11043
Underflow in PHP-FPM can lead to RCE
9.8
CVE-2019-16928
Exim Out-of-bounds Write Vulnerability
9.8
CVE-2019-10149
Exim Mail Transfer Agent (MTA) Improper Input Validation