Vulnerability CVE-2019-20395
Published: 2020-01-22   Modified: 2020-01-23

Description:
A stack consumption issue is present in libyang before v1.0-r1 due to the self-referential union type containing leafrefs. Applications that use libyang to parse untrusted input yang files may crash.

Type:

CWE-400

 (Uncontrolled Resource Consumption ('Resource Exhaustion'))

CVSS2 => (AV:N/AC:M/Au:N/C:N/I:N/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.3/10
2.9/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Partial
Affected software
Cesnet -> Libyang 

 References:
https://bugzilla.redhat.com/show_bug.cgi?id=1793924
https://github.com/CESNET/libyang/commit/4e610ccd87a2ba9413819777d508f71163fcc237
https://github.com/CESNET/libyang/compare/v0.16-r3...v1.0-r1
https://github.com/CESNET/libyang/issues/724
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