National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2019-20398 Detail

Current Description

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.

Source:  MITRE
View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
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

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://bugzilla.redhat.com/show_bug.cgi?id=1793935 Issue Tracking Patch Third Party Advisory
https://github.com/CESNET/libyang/commit/7852b272ef77f8098c35deea6c6f09cb78176f08 Patch
https://github.com/CESNET/libyang/compare/v1.0-r2...v1.0-r3 Third Party Advisory
https://github.com/CESNET/libyang/issues/773 Exploit Third Party Advisory

Weakness Enumeration

CWE-ID CWE Name Source
CWE-476 NULL Pointer Dereference NIST  

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:cesnet:libyang:0.11:r1:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:cesnet:libyang:0.11:r2:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:cesnet:libyang:0.12:r1:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:cesnet:libyang:0.12:r2:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:cesnet:libyang:0.13:r1:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:cesnet:libyang:0.13:r2:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:cesnet:libyang:0.14:r1:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:cesnet:libyang:0.15:r1:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:cesnet:libyang:0.16:r1:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:cesnet:libyang:0.16:r2:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:cesnet:libyang:0.16:r3:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:cesnet:libyang:1.0:r1:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:cesnet:libyang:1.0:r2:*:*:*:*:*:*
     Show Matching CPE(s)


Change History

1 change record found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2019-20398
NVD Published Date:
01/22/2020
NVD Last Modified:
01/23/2020