CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2019-20840
High (7.5). EPSS 2.7% chance of exploitation in the next 30 days.
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.
Severity
- EPSS
- 2.7% chance of exploitation in the next 30 days; higher than 85% of CVEs (scores of 2026-10-31)
- CWE
- CWE-787
- Published
- Modified
- Record from
- the NVD, synced
Affected
- canonical:ubuntu_linux
- debian:debian_linux
- libvnc_project:libvncserver
- opensuse:leap
- siemens:simatic_itc1500_firmware
- siemens:simatic_itc1500_pro_firmware
- siemens:simatic_itc1900_firmware
- siemens:simatic_itc1900_pro_firmware
- siemens:simatic_itc2200_firmware
- siemens:simatic_itc2200_pro_firmware
References
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00033.html
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00055.html
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00066.html
- https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdf
- https://github.com/LibVNC/libvncserver/commit/0cf1400c61850065de590d403f6d49e32882fd76