SB20240806385 - Amazon Linux AMI update for bind
Published: August 6, 2024
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 8 secuirty vulnerabilities.
1) Resource management error (CVE-ID: CVE-2022-2795)
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 processing large delegations. A remote attacker can flood the target resolver with queries and perform a denial of service (DoS) attack.
2) Input validation error (CVE-ID: CVE-2022-3080)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to an error when resolvers are configured to answer from stale cache with zero stale-answer-client-timeout and there is a stale CNAME in the cache for an incoming query. A remote attacker can send a specially crafted request to the DNS resolver and perform a denial of service (DoS) attack.
3) Resource exhaustion (CVE-ID: CVE-2022-3094)
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 when handling DNS updates. A remote attacker can trigger resource exhaustion by sending a flood of dynamic DNS updates.
4) Input validation error (CVE-ID: CVE-2022-3488)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of repeated responses to the same query, where both responses contain ECS pseudo-options, however the first is incorrect and gets rejected by the resolver. A remote attacker controlling a malicious nameserver can respond with two responses in
quick succession, each with a "CLIENT-SUBNET" pseudo-option and crash the server.
5) Input validation error (CVE-ID: CVE-2022-3736)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can send specially crafted RRSIG query to the DNS server and perform a denial of service (DoS) attack.
Successful exploitation of the vulnerability requires that stale cache and stale answers are enabled, option stale-answer-client-timeout is set to a positive integer, and the resolver receives an RRSIG query.
6) Memory leak (CVE-ID: CVE-2022-38177)
The vulnerability allows a remote attacker to perform DoS attack on the target system.
The vulnerability exists due memory leak in the DNSSEC verification code for the ECDSA algorithm. A remote attacker can spoof the target resolver with responses that have a malformed ECDSA signature and perform denial of service attack.
7) Memory leak (CVE-ID: CVE-2022-38178)
The vulnerability allows a remote attacker to perform DoS attack on the target system.
The vulnerability exists due memory leak in the DNSSEC verification code for the EdDSA algorithm. A remote attacker can spoof the target resolver with responses that have a malformed EdDSA signature and perform denial of service attack.
8) Reachable Assertion (CVE-ID: CVE-2022-3924)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a reachable assertion. A remote attacker can send specially crafted queries to the resolver and perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.