Buffer overflow in Libvnc Project Libvncserver
CVE-2019-20840
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.026 (84.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 84.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.026 · newest: 0.026 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/LibVNC/libvncserver/compare/LibVNCServer-0.9.12...LibVNCServer-0.9.13 (Third Party Advisory, Release Notes)
- github.com/LibVNC/libvncserver/commit/0cf1400c61850065de590d403f6d49e32882fd76 (Patch, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.opensuse.org/opensuse-security-announce/2020-07/msg00033.html (vendor-advisory, Mailing List, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2020-07/msg00055.html (vendor-advisory, Mailing List, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2020-07/msg00066.html (vendor-advisory, Mailing List, Third Party Advisory)
- usn.ubuntu.com/4434-1/ (vendor-advisory, Third Party Advisory)
- cert-portal.siemens.com/productcert/pdf/ssa-390195.pdf (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-20840?
- CVE-2019-20840 is a high-severity vulnerability in Libvnc Project Libvncserver, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2020-06-17.
- How severe is CVE-2019-20840?
- High severity. CVSS v3 base score is 7.5 out of 10.