CVE Vulnerability

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.

4.3 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8.6 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

Scope

6.5 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://github.com/CESNET/libyang/commit/7852b272ef77f8098c35deea6c6f09cb78176f08 Patch
https://bugzilla.redhat.com/show_bug.cgi?id=1793935 Issue Tracking 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
Configurations

Configuration 1

cpe:2.3:a:cesnet:libyang:1.0:r1:*:*:*:*:*:*
cpe:2.3:a:cesnet:libyang:1.0:r2:*:*:*:*:*:*
cpe:2.3:a:cesnet:libyang:0.16:r1:*:*:*:*:*:*
cpe:2.3:a:cesnet:libyang:0.16:r2:*:*:*:*:*:*
cpe:2.3:a:cesnet:libyang:0.16:r3:*:*:*:*:*:*
cpe:2.3:a:cesnet:libyang:0.13:r1:*:*:*:*:*:*
cpe:2.3:a:cesnet:libyang:0.13:r2:*:*:*:*:*:*
cpe:2.3:a:cesnet:libyang:0.12:r1:*:*:*:*:*:*
cpe:2.3:a:cesnet:libyang:0.12:r2:*:*:*:*:*:*
cpe:2.3:a:cesnet:libyang:0.11:r1:*:*:*:*:*:*
cpe:2.3:a:cesnet:libyang:0.11:r2:*:*:*:*:*:*
cpe:2.3:a:cesnet:libyang:0.14:r1:*:*:*:*:*:*
cpe:2.3:a:cesnet:libyang:0.15:r1:*:*:*:*:*:*
Information

Published : 2020-01-22 10:15

Updated : 2020-01-23 08:13

NVD link : CVE-2019-20398

Mitre link : CVE-2019-20398

Products Affected
No products.
CWE
CWE-476