SB2024082811 - Red Hat Enterprise Linux 9 update for bind and bind-dyndb-ldap
Published: August 28, 2024
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 secuirty vulnerabilities.
1) Resource management error (CVE-ID: CVE-2024-1737)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper management of internal resources within the application when handling a very large number of RRs. Resolver caches and authoritative zone databases that hold significant numbers of RRs for the same hostname (of any RTYPE) can suffer from degraded performance as content is being added or updated, and also when handling client queries for this name.
2) Resource exhaustion (CVE-ID: CVE-2024-1975)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to application does not properly control consumption of internal resources. If a server hosts a zone containing a "KEY" Resource Record, or a resolver DNSSEC-validates a "KEY" Resource Record from a DNSSEC-signed domain in cache, a client can exhaust resolver CPU resources by sending a stream of SIG(0) signed requests.
3) Reachable assertion (CVE-ID: CVE-2024-4076)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a reachable assertion when serving both stale cache data and authoritative zone content. A remote attacker can send specially crafted queries to the DNS server to trigger an assertion failure and perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.