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I. Basic Information for CVE-2023-50868
Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Knot Resolver 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Knot Resolver是一款缓存DNS解析器实现，它包括解析器库和守护程序。 Knot Resolver 5.7.1之前版本存在安全漏洞，该漏洞源于允许远程攻击者通过随机子域攻击造成拒绝服务。
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
VendorProductAffected VersionsCPESubscribe
-n/a n/a -
II. Public POCs for CVE-2023-50868
#POC DescriptionSource LinkShenlong Link
1This project generates DNS zonefiles with custom NSEC3 parameters to reproduce and evaluate the attacks in CVE-2023-50868.https://github.com/Goethe-Universitat-Cybersecurity/NSEC3-Encloser-AttackPOC Details
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III. Intelligence Information for CVE-2023-50868
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IV. Related Vulnerabilities
Same product: n/a
Same vendor: n/a
V. Comments for CVE-2023-50868

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