SB2019101715 - Reachable Assertion in ISC BIND
Published: October 17, 2019 Updated: July 24, 2020
Security Bulletin ID
SB2019101715
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Reachable Assertion (CVE-ID: CVE-2019-6476)
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
A defect in code added to support QNAME minimization can cause named to exit with an assertion failure if a forwarder returns a referral rather than resolving the query. This affects BIND versions 9.14.0 up to 9.14.6, and 9.15.0 up to 9.15.4.
Remediation
Install update from vendor's website.