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Redhat.comRH:CVE-2023-50868HistoryFeb 13, 2024 - 8:27 p.m.
CVE-2023-50868
2024-02-1320:27:25
redhat.com
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cve-2023-50868
bind9
dnssec resolver
cpu exhaustion
denial of service
nsec3
dnssec validation
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.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
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ISC BIND 9.0.0 < 9.16.48 / 9.9.3-S1 < 9.16.48-S1 / 9.18.0 < 9.18.24 / 9.18.11-S1 < 9.18.24-S1 / 9.19.0 < 9.19.21 Vulnerability (cve-2023-50868)
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RHEL 9 : unbound (RHSA-2024:0981)
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CVE-2023-50868 vulnerabilities
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