Medium severity · published Jan 22, 2020
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
6.5
CVSS
1.9%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.9% · higher than 80% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
Libyang · Cesnet
0.11; 0.11; 0.12; 0.12; 0.13; 0.13; +5 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-20396
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-20396
Patch
https://github.com/CESNET/libyang/commit/a1f17693904ed6fecc8902c747fc50a8f20e6af8
Third Party Advisory
https://github.com/CESNET/libyang/compare/v0.16-r3...v1.0-r1
Exploit
https://github.com/CESNET/libyang/issues/740
lists.debian.org
https://lists.debian.org/debian-lts-announce/2023/09/msg00019.html
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