CVE-2019-20398 is a NULL pointer dereference vulnerability affecting libyang versions prior to v1.0-r3, specifically within the lys_extension_instances_free() function when handling unresolved extensions. This flaw can lead to application crashes when parsing untrusted YANG files. Rated Medium severity (CVSS 6.5), it requires user interaction (UI:R) and network access (AV:N) to exploit, resulting in high availability impact (A:H). There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.
| 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:N/I:N/A:H
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