SB2020061818 - Denial of service in ISC Bind
Published: June 18, 2020 Updated: June 22, 2020
Security Bulletin ID
SB2020061818
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-2020-8618)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a reachable assertion in rdataset.c when processing large responses during zone transfers. A remote attacker with ability to send zone data to a server via zone transfer can exploit this to intentionally trigger memory corruption and assertion failure with a specially constructed zone, denying service to clients.
Remediation
Install update from vendor's website.