Resource exhaustion in libyang - CVE-2019-20395
Published: January 22, 2020 / Updated: August 8, 2020
Vulnerability identifier: #VU34865
CSH Severity: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2019-20395
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
libyang
libyang
Software vendor:
CESNET
CESNET
Description
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
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.
Remediation
Install update from vendor's website.