CVE-2019-20397 Information

Description

A double-free is present in libyang before v1.0-r1 in the function yyparse() when an organization field is not terminated. Applications that use libyang to parse untrusted input yang files may be vulnerable to this flaw which would cause a crash or potentially code execution.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Reference

https://bugzilla.redhat.com/show_bug.cgi?id=1793928 https://github.com/CESNET/libyang/commit/88bd6c548ba79bce176cd875e9b56e7e0ef4d8d4 https://github.com/CESNET/libyang/compare/v0.16-r3…v1.0-r1 https://github.com/CESNET/libyang/issues/739

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.8