SB2018012320 - Input validation error in Unbound
Published: January 23, 2018 Updated: July 17, 2020
Security Bulletin ID
SB2018012320
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Input validation error (CVE-ID: CVE-2017-15105)
The vulnerability allows a remote non-authenticated attacker to manipulate data.
A flaw was found in the way unbound before 1.6.8 validated wildcard-synthesized NSEC records. An improperly validated wildcard NSEC record could be used to prove the non-existence (NXDOMAIN answer) of an existing wildcard record, or trick unbound into accepting a NODATA proof.
Remediation
Install update from vendor's website.