CISA Warns of Exploitable Vulnerabilities in Popular BIND 9 DNS Software
Vulnerabilities mentionedAll →
| CVE | Vulnerability | CVSS | EPSS | Flags | Affected | Exposure | Published |
|---|---|---|---|---|---|---|---|
| CVE-2023-50387 | Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote attackers to cause a denial of service (CPU consumptio Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote attackers to cause a denial of service (CPU consumption) via one or more DNSSEC responses, aka the "KeyTrap" issue. One of the concerns is that, when there is a zone with many DNSKEY and RRSIG records, the protocol specification implies that an algorithm must evaluate all combinations of DNSKEY and RRSIG records. NVD description · AI analysis pending | 7.5 | 100% |
| — | ||
| CVE-2024-0760 | A malicious client can send many DNS messages over TCP, potentially causing the server to become unstable while the attack is in progress. A malicious client can send many DNS messages over TCP, potentially causing the server to become unstable while the attack is in progress. The server may recover after the attack ceases. Use of ACLs will not mitigate the attack. This issue affects BIND 9 versions 9.18.1 through 9.18.27, 9.19.0 through 9.19.24, and 9.18.11-S1 through 9.18.27-S1. NVD description · AI analysis pending | 7.5 | 5% | — | — | ||
| CVE-2024-1737 | Resolver caches and authoritative zone databases that hold significant numbers of RRs for the same hostname (of any RTYPE) can suffer from degraded performance 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. This issue affects BIND 9 versions 9.11.0 through 9.11.37, 9.16.0 through 9.16.50, 9.18.0 through 9.18.27, 9.19.0 through 9.19.24, 9.11.4-S1 through 9.11.37-S1, 9.16.8-S1 through 9.16.50-S1, and 9.18.11-S1 through 9.18.27-S1. NVD description · AI analysis pending | 7.5 | 2% | — | — | ||
| CVE-2024-1975 | 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 clie 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. This issue affects BIND 9 versions 9.0.0 through 9.11.37, 9.16.0 through 9.16.50, 9.18.0 through 9.18.27, 9.19.0 through 9.19.24, 9.9.3-S1 through 9.11.37-S1, 9.16.8-S1 through 9.16.49-S1, and 9.18.11-S1 through 9.18.27-S1. NVD description · AI analysis pending | 7.5 | 2% | — | — | ||
| CVE-2024-4076 | Client queries that trigger serving stale data and that also require lookups in local authoritative zone data may result in an assertion failure. Client queries that trigger serving stale data and that also require lookups in local authoritative zone data may result in an assertion failure. This issue affects BIND 9 versions 9.16.13 through 9.16.50, 9.18.0 through 9.18.27, 9.19.0 through 9.19.24, 9.11.33-S1 through 9.11.37-S1, 9.16.13-S1 through 9.16.50-S1, and 9.18.11-S1 through 9.18.27-S1. NVD description · AI analysis pending | 7.5 | 2% | — | — |
Full article324 words · extracted from thehackernews.com · click to collapse
Ravie LakshmananJul 25, 2024DNS Security /Vulnerability
The Internet Systems Consortium (ISC) has released patches to address multiple security vulnerabilities in the Berkeley Internet Name Domain (BIND) 9 Domain Name System (DNS) software suite that could be exploited to trigger a denial-of-service (DoS) condition.
"A cyber threat actor could exploit one of these vulnerabilities to cause a denial-of-service condition," the U.S. Cybersecurity and Infrastructure Security Agency (CISA) said in an advisory.
The list of four vulnerabilities is listed below -
- CVE-2024-4076 (CVSS score: 7.5) - Due to a logic error, lookups that triggered serving stale data and required lookups in local authoritative zone data could have resulted in an assertion failure
- CVE-2024-1975 (CVSS score: 7.5) - Validating DNS messages signed using the SIG(0) protocol could cause excessive CPU load, leading to a denial-of-service condition.
- CVE-2024-1737 (CVSS score: 7.5) - It is possible to craft excessively large numbers of resource record types for a given owner name, which has the effect of slowing down database processing
- CVE-2024-0760 (CVSS score: 7.5) - A malicious DNS client that sent many queries over TCP but never read the responses could cause a server to respond slowly or not at all for other clients
Successful exploitation of the aforementioned bugs could cause a named instance to terminate unexpectedly, deplete available CPU resources, slow down query processing by a factor of 100, and render the server unresponsive.
The flaws have been addressed in BIND 9 versions 9.18.28, 9.20.0, and 9.18.28-S1 released earlier this month. There is no evidence that any of the shortcomings have been exploited in the wild.
The disclosure comes months after the ISC addressed another flaw in BIND 9 called KeyTrap (CVE-2023-50387, CVSS score: 7.5) that could be abused to exhaust CPU resources and stall DNS resolvers, resulting in a denial-of-service (DoS).
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Text extracted automatically; images, tables and formatting may be missing. Original: https://thehackernews.com/2024/07/cisa-warns-of-exploitable.html