SB2019120923 - Fedora 31 update for libyang
Published: December 9, 2019 Updated: April 25, 2025
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 secuirty vulnerabilities.
1) Stack-based buffer overflow (CVE-ID: CVE-2019-19334)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when libyang parses YANG files with a leaf of type "identityref". A remote unauthenticated attacker can pass to the application an untrusted YANG file, trigger stack-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
2) Stack-based buffer overflow (CVE-ID: CVE-2019-19333)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when libyang parses YANG files with a leaf of type "bits". A remote unauthenticated attacker can pass to the application an untrusted YANG file, trigger stack-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Install update from vendor's website.