SB2019120609 - Remote code execution in libyang

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Main Vulnerability Database SB2019120609

SB2019120609 - Remote code execution in libyang

Published: December 6, 2019 Updated: December 23, 2019

Security Bulletin ID SB2019120609
Severity
High
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) 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.


2) 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.


Remediation

Install update from vendor's website.

References