vulnerability
Oracle Linux: CVE-2023-50868: ELSA-2024-1335: dnsmasq security update (IMPORTANT) (Multiple Advisories)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 8 | (AV:N/AC:L/Au:N/C:N/I:N/A:C) | Feb 13, 2024 | Feb 28, 2024 | Feb 4, 2025 |
Severity
8
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:C)
Published
Feb 13, 2024
Added
Feb 28, 2024
Modified
Feb 4, 2025
Description
The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance is skipped) allows remote attackers to cause a denial of service (CPU consumption for SHA-1 computations) via DNSSEC responses in a random subdomain attack, aka the "NSEC3" issue. The RFC 5155 specification implies that an algorithm must perform thousands of iterations of a hash function in certain situations.
A flaw was found in bind9. By flooding a DNSSEC resolver with responses coming from a DNSEC-signed zone using NSEC3, an attacker can lead the targeted resolver to a CPU exhaustion, further leading to a Denial of Service on the targeted host.
This vulnerability applies only for systems where DNSSEC validation is enabled.
A flaw was found in bind9. By flooding a DNSSEC resolver with responses coming from a DNSEC-signed zone using NSEC3, an attacker can lead the targeted resolver to a CPU exhaustion, further leading to a Denial of Service on the targeted host.
This vulnerability applies only for systems where DNSSEC validation is enabled.
Solution(s)
oracle-linux-upgrade-bindoracle-linux-upgrade-bind9-16oracle-linux-upgrade-bind9-16-chrootoracle-linux-upgrade-bind9-16-develoracle-linux-upgrade-bind9-16-dnssec-utilsoracle-linux-upgrade-bind9-16-docoracle-linux-upgrade-bind9-16-libsoracle-linux-upgrade-bind9-16-licenseoracle-linux-upgrade-bind9-16-utilsoracle-linux-upgrade-bind-chrootoracle-linux-upgrade-bind-develoracle-linux-upgrade-bind-dnssec-docoracle-linux-upgrade-bind-dnssec-utilsoracle-linux-upgrade-bind-docoracle-linux-upgrade-bind-dyndb-ldaporacle-linux-upgrade-bind-export-develoracle-linux-upgrade-bind-export-libsoracle-linux-upgrade-bind-libsoracle-linux-upgrade-bind-libs-liteoracle-linux-upgrade-bind-licenseoracle-linux-upgrade-bind-lite-develoracle-linux-upgrade-bind-pkcs11oracle-linux-upgrade-bind-pkcs11-develoracle-linux-upgrade-bind-pkcs11-libsoracle-linux-upgrade-bind-pkcs11-utilsoracle-linux-upgrade-bind-sdboracle-linux-upgrade-bind-sdb-chrootoracle-linux-upgrade-bind-utilsoracle-linux-upgrade-dhclientoracle-linux-upgrade-dhcporacle-linux-upgrade-dhcp-clientoracle-linux-upgrade-dhcp-commonoracle-linux-upgrade-dhcp-develoracle-linux-upgrade-dhcp-libsoracle-linux-upgrade-dhcp-relayoracle-linux-upgrade-dhcp-serveroracle-linux-upgrade-dnsmasqoracle-linux-upgrade-dnsmasq-utilsoracle-linux-upgrade-python3-bindoracle-linux-upgrade-python3-bind9-16oracle-linux-upgrade-python3-unboundoracle-linux-upgrade-unboundoracle-linux-upgrade-unbound-develoracle-linux-upgrade-unbound-libsoracle-linux-upgrade-unbound-python
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