CVE-2024-1975— SIG(0) can be used to exhaust CPU resources
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I. Basic Information for CVE-2024-1975
Vulnerability Information
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Vulnerability Title
SIG(0) can be used to exhaust CPU resources
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
ISC BIND 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ISC BIND是ISC开源的一套实现了DNS协议的开源软件。 ISC BIND 9存在安全漏洞，该漏洞源于SIG(0)可用于耗尽CPU资源。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2024-1975
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Same Patch Batch · ISC · 2024-07-23 · 4 CVEs total
| CVE-2024-0760 | 7.5 HIGH | A flood of DNS messages over TCP may make the server unstable |
| CVE-2024-1737 | 7.5 HIGH | BIND's database will be slow if a very large number of RRs exist at the same name |
| CVE-2024-4076 | 7.5 HIGH | Assertion failure when serving both stale cache data and authoritative zone content |
IV. Related Vulnerabilities
Same product: BIND 9
- CVE-2026-3591
A stack use-after-return flaw in SIG(0) handling code may en - CVE-2026-3119
Authenticated query containing a TKEY record may cause named - CVE-2026-3104
Memory leak in code preparing DNSSEC proofs of non-existence - CVE-2026-1519
Excessive NSEC3 iterations cause high CPU load during insecu - CVE-2025-13878
Malformed BRID/HHIT records can cause named to terminate une
Same vendor: ISC
- CVE-2026-3591
A stack use-after-return flaw in SIG(0) handling code may en - CVE-2026-3119
Authenticated query containing a TKEY record may cause named - CVE-2026-3104
Memory leak in code preparing DNSSEC proofs of non-existence - CVE-2026-1519
Excessive NSEC3 iterations cause high CPU load during insecu - CVE-2026-3608
Stack overflow in Kea daemons
V. Comments for CVE-2024-1975
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