What is CVE-2019-20396?

CVE-2019-20396 is a medium-severity vulnerability in Cesnet Libyang, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 6.5/10. Published 2020-01-22.

How severe is CVE-2019-20396?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Buffer overflow in Cesnet Libyang

CVE-2019-20396

A segmentation fault is present in yyparse in libyang before v1.0-r1 due to a malformed pattern statement value during lys_parse_path parsing.

Vulnerability class: Buffer Overflow

EPSS: 0.019 (77.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

Affected products

Cesnet Libyang — versions 0.11, 0.12, 0.13
N/a — versions n/a

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

References

cve@mitre.org (Third Party Advisory)
cve@mitre.org (Exploit, Third Party Advisory)
cve@mitre.org (Patch, Third Party Advisory)
cve@mitre.org (mailing-list)

Frequently asked questions

What is CVE-2019-20396?: CVE-2019-20396 is a medium-severity vulnerability in Cesnet Libyang, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 6.5/10. Published 2020-01-22.
How severe is CVE-2019-20396?: Medium severity. CVSS v3 base score is 6.5 out of 10.