CVE-2019-20397 is a double-free vulnerability in cesnet libyang versions prior to v1.0-r1, specifically within the yyparse() function when an organization field lacks proper termination. This flaw, rated 8.8 HIGH (CVSS:3.1), allows unauthenticated attackers to trigger a crash or potentially achieve remote code execution by enticing a user to parse a specially crafted, untrusted YANG file. While the vulnerability presents a high risk due to its network attack vector and low complexity, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
0.11CPE matchmatch criteria | cpe:2.3:a:cesnet:libyang:0.11:r1:*:*:*:*:*:* | ||
0.11CPE matchmatch criteria | cpe:2.3:a:cesnet:libyang:0.11:r2:*:*:*:*:*:* | ||
0.12CPE matchmatch criteria | cpe:2.3:a:cesnet:libyang:0.12:r1:*:*:*:*:*:* | ||
0.12CPE matchmatch criteria | cpe:2.3:a:cesnet:libyang:0.12:r2:*:*:*:*:*:* | ||
0.13CPE matchmatch criteria | cpe:2.3:a:cesnet:libyang:0.13:r1:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 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 0.1 Security Researcher mentions.