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CVE-2022-38177— Memory leak in ECDSA DNSSEC verification code

Quick assessment

Affected
ISC BIND9
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ISC BIND是美国ISC公司的一套实现了DNS协议的开源软件。 ISC BIND 9.8.4版本至9.16.32版本存在安全漏洞，该漏洞源于使用格式错误的ECDSA签名，欺骗目标解析程序，导致内存因资源不足而崩溃。

CVSS 7.5 · High EPSS 3.15% · P88

Possible ATT&CK Techniques 1 AI

T1498 · Network Denial of Service
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I. Basic Information for CVE-2022-38177

Vulnerability Information
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Vulnerability Title
Memory leak in ECDSA DNSSEC verification code
Source: CVE Program / CVE List V5
Vulnerability Description
By spoofing the target resolver with responses that have a malformed ECDSA signature, an attacker can trigger a small memory leak. It is possible to gradually erode available memory to the point where named crashes for lack of resources.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
ISC BIND 数据伪造问题漏洞
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 9.8.4版本至9.16.32版本存在安全漏洞，该漏洞源于使用格式错误的ECDSA签名，欺骗目标解析程序，导致内存因资源不足而崩溃。
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

Vendor Product Affected Versions CPE Subscribe
ISC BIND9 Open Source Branches 9.8 through 9.16 9.8.4 through versions before 9.16.33 -

II. Public POCs for CVE-2022-38177

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III. Intelligence Information for CVE-2022-38177

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Vendor Advisories for CVE-2022-38177 (3)

Mailing List Discussions for CVE-2022-38177 (5)

Other References for CVE-2022-38177 (1)

Same Patch Batch · ISC · 2022-09-21 · 6 CVEs total

CVE-2022-3080 7.5 HIGH BIND 9 resolvers configured to answer from stale cache with zero stale-answer-client-timeo
CVE-2022-38178 7.5 HIGH Memory leaks in EdDSA DNSSEC verification code
CVE-2022-2906 7.5 HIGH Memory leaks in code handling Diffie-Hellman key exchange via TKEY RRs (OpenSSL 3.0.0+ onl
CVE-2022-2881 5.5 MEDIUM Buffer overread in statistics channel code
CVE-2022-2795 5.3 MEDIUM Processing large delegations may severely degrade resolver performance

IV. Related Vulnerabilities

Same product: BIND9
Same vendor: ISC

V. Comments for CVE-2022-38177

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