Vulnerability Details CVE-2019-20398
A NULL pointer dereference is present in libyang before v1.0-r3 in the function lys_extension_instances_free() due to a copy of unresolved extensions in lys_restr_dup(). Applications that use libyang to parse untrusted input yang files may crash.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 37.0%
CVSS Severity
CVSS v3 Score 6.5
CVSS v2 Score 4.3
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1793935
- https://github.com/CESNET/libyang/commit/7852b272ef77f8098c35deea6c6f09cb78176f08
- https://github.com/CESNET/libyang/compare/v1.0-r2...v1.0-r3
- https://github.com/CESNET/libyang/issues/773
- https://lists.debian.org/debian-lts-announce/2023/09/msg00019.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1793935
- https://github.com/CESNET/libyang/commit/7852b272ef77f8098c35deea6c6f09cb78176f08
- https://github.com/CESNET/libyang/compare/v1.0-r2...v1.0-r3
- https://github.com/CESNET/libyang/issues/773
- https://lists.debian.org/debian-lts-announce/2023/09/msg00019.html
Products affected by CVE-2019-20398
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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
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cpe:2.3:a:cesnet:libyang:1.0