SB2019120721 - Input validation error in kea (Alpine package)

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Main Vulnerability Database SB2019120721

SB2019120721 - Input validation error in kea (Alpine package)

Published: December 7, 2019

Security Bulletin ID SB2019120721
Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Adjecent network
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 security vulnerability.


1) Input validation error (CVE-ID: CVE-2019-6474)

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

A missing check on incoming client requests can be exploited to cause a situation where the Kea server's lease storage contains leases which are rejected as invalid when the server tries to load leases from storage on restart. If the number of such leases exceeds a hard-coded limit in the Kea code, a server trying to restart will conclude that there is a problem with its lease store and give up. Versions affected: 1.4.0 to 1.5.0, 1.6.0-beta1, and 1.6.0-beta2


Remediation

Install update from vendor's website.

References