Buffer overflow in Cesnet Libyang
CVE-2019-20391
An invalid memory access flaw is present in libyang before v1.0-r3 in the function resolve_feature_value() when an if-feature statement is used inside a bit. Applications that use libyang to parse untrusted input yang files may crash.
Vulnerability class: Buffer Overflow
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.019 (78.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 79th percentile — 78.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.019 · newest: 0.019 · change: +0.000
Affected products
- Cesnet Libyang — versions 0.11, 0.12, 0.13
Weakness classification (CWE)
References
- github.com/CESNET/libyang/commit/bdb596ddc07596fa212f231135b87d0b9178f6f8 (Patch, Third Party Advisory)
- github.com/CESNET/libyang/issues/772 (Exploit, Third Party Advisory)
- bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
- github.com/CESNET/libyang/compare/v1.0-r2...v1.0-r3 (Third Party Advisory)
- lists.debian.org/debian-lts-announce/2023/09/msg00019.html (mailing-list)
Frequently asked questions
- What is CVE-2019-20391?
- CVE-2019-20391 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-2019-20391?
- Medium severity. CVSS v3 base score is 6.5 out of 10.