Vulnerability Details CVE-2019-20393
A double-free is present in libyang before v1.0-r1 in the function yyparse() when an empty description is used. Applications that use libyang to parse untrusted input yang files may be vulnerable to this flaw, which would cause a crash or potentially code execution.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 43.9%
CVSS Severity
CVSS v3 Score 8.8
CVSS v2 Score 6.8
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1793930
- https://github.com/CESNET/libyang/commit/d9feacc4a590d35dbc1af21caf9080008b4450ed
- https://github.com/CESNET/libyang/compare/v0.16-r3...v1.0-r1
- https://github.com/CESNET/libyang/issues/742
- https://lists.debian.org/debian-lts-announce/2023/09/msg00019.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1793930
- https://github.com/CESNET/libyang/commit/d9feacc4a590d35dbc1af21caf9080008b4450ed
- https://github.com/CESNET/libyang/compare/v0.16-r3...v1.0-r1
- https://github.com/CESNET/libyang/issues/742
- https://lists.debian.org/debian-lts-announce/2023/09/msg00019.html
Products affected by CVE-2019-20393
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cpe:2.3:a:cesnet:libyang:0.11
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cpe:2.3:a:cesnet:libyang:0.12
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cpe:2.3:a:cesnet:libyang:0.13
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cpe:2.3:a:cesnet:libyang:0.14
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cpe:2.3:a:cesnet:libyang:0.15
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cpe:2.3:a:cesnet:libyang:0.16