SB2018081025 - Fedora 28 update for bind
Published: August 10, 2018 Updated: April 24, 2025
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 vulnerabilities.
1) Information disclosure (CVE-ID: CVE-2018-5738)
CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote attacker to obtain potentially sensitive information.
The vulnerability exists due to improper access controls. When configured with "recursion yes;" and match list values are not provided for "allow-query-cache" or "allow-query", the "allow-recursion" setting may permit all hosts to perform recursion. A remote attacker can bypass intended recursion access controls, make a recursive query to a BIND nameserver in certain cases and examine the results of queries answered from the cache to determine which queries a server has previously responded to.
2) Assertion failure (CVE-ID: CVE-2018-5740)
CWE-ID: CWE-617 - Reachable Assertion
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows an attacker to perform denial of service (DoS) attack.
The vulnerability exists due to INSIST assertion failure in name.c when processing recursive queries. A remote attacker can trigger denial of service conditions if the affected server is configured with enabled "deny-answer-aliases" feature.
Remediation
Install update from vendor's website.