CVE-2022-2795— Processing large delegations may severely degrade resolver performance
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I. Basic Information for CVE-2022-2795
Vulnerability Information
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Vulnerability Title
Processing large delegations may severely degrade resolver performance
Source: NVD (National Vulnerability Database)
Vulnerability Description
By flooding the target resolver with queries exploiting this flaw an attacker can significantly impair the resolver's performance, effectively denying legitimate clients access to the DNS resolution service.
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:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
ISC BIND 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ISC BIND是美国ISC公司的一套实现了DNS协议的开源软件。 ISC BIND 9.16.33之前版本、9.18.7之前的9.18.x版本、9.19.5之前的9.19.x版本存在安全漏洞，该漏洞源于解析器代码中的缺陷可能会导致命名在处理大型委托上花费过多的时间,攻击者通过利用此漏洞向目标解析器充斥查询，可以显着削弱解析器的性能，从而有效地拒绝合法客户端访问DNS解析服务。
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
II. Public POCs for CVE-2022-2795
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- https://www.debian.org/security/2022/dsa-5235vendor-advisory
- https://security.gentoo.org/glsa/202210-25vendor-advisory
- https://nvd.nist.gov/vuln/detail/CVE-2022-2795
Same Patch Batch · ISC · 2022-09-21 · 6 CVEs total
| CVE-2022-2906 | 7.5 HIGH | Memory leaks in code handling Diffie-Hellman key exchange via TKEY RRs (OpenSSL 3.0.0+ onl |
| CVE-2022-3080 | 7.5 HIGH | BIND 9 resolvers configured to answer from stale cache with zero stale-answer-client-timeo |
| CVE-2022-38177 | 7.5 HIGH | Memory leak in ECDSA DNSSEC verification code |
| CVE-2022-38178 | 7.5 HIGH | Memory leaks in EdDSA DNSSEC verification code |
| CVE-2022-2881 | 5.5 MEDIUM | Buffer overread in statistics channel code |
IV. Related Vulnerabilities
Same product: BIND9
- CVE-2022-3080
BIND 9 resolvers configured to answer from stale cache with - CVE-2022-38178
Memory leaks in EdDSA DNSSEC verification code - CVE-2022-38177
Memory leak in ECDSA DNSSEC verification code - CVE-2022-2906
Memory leaks in code handling Diffie-Hellman key exchange vi - CVE-2022-2881
Buffer overread in statistics channel code
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
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