CVE-2020-28935 describes a local symlink vulnerability in NLnet Labs Unbound (up to 1.12.0) and NSD (up to 4.3.3). An attacker with local access to the user Unbound/NSD runs as could create a symlink in place of the PID file, allowing the service to overwrite an arbitrary file upon restart with root privileges. This vulnerability has a CVSS score of 5.5 (Medium), indicating a local attack vector with low complexity, low privileges required, and a high impact on availability (Denial of Service). There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage for this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 4.3.4CPE matchmatch criteria | cpe:2.3:a:nlnetlabs:name_server_daemon:*:*:*:*:*:*:*:* | ||
< 1.13.0CPE matchmatch criteria | cpe:2.3:a:nlnetlabs:unbound:*:*:*:*:*:*:*:* | ||
9.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.