CVE-2018-20748 is a critical heap out-of-bounds write vulnerability affecting LibVNC versions prior to 0.9.12, specifically within the libvncclient/rfbproto.c component. This flaw, an incomplete fix for a previous vulnerability, impacts products from Canonical, Debian, LibVNC Project, and Siemens. With a CVSS score of 9.8 (Critical), it allows unauthenticated attackers to remotely execute code with high impact on confidentiality, integrity, and availability, requiring no user interaction. Despite its severity, there is no evidence of active exploitation, publicly available exploit code in Metasploit or ExploitDB, nor significant community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 0.9.12CPE matchmatch criteria | cpe:2.3:a:libvnc_project:libvncserver:*:*:*:*:*:*:*:* | ||
8.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* | ||
14.04CPE matchmatch criteria | cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* | ||
16.04CPE matchmatch criteria | cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* | ||
18.04CPE matchmatch criteria | cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.