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CVE-2022-2906— Memory leaks in code handling Diffie-Hellman key exchange via TKEY RRs (OpenSSL 3.0.0+ only)

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 9.18.7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OpenSSL 1.x和OpenSSL 3.0之间的更改暴露了命名中的一个缺陷，当在Diffie-Hellman模式下与OpenSSL 3.0.0及更高版本一起使用TKEY记录时，该缺陷会导致密钥处理中出现少量内存泄漏。攻击者可以利用此漏洞逐渐侵蚀可用内存，以至于命名的内存因缺乏资源而崩溃，重新启动后，攻击者将不得不重新开始，但

CVSS 7.5 · High EPSS 2.05% · P81

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2022-2906

Vulnerability Information
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Vulnerability Title
Memory leaks in code handling Diffie-Hellman key exchange via TKEY RRs (OpenSSL 3.0.0+ only)
Source: CVE Program / CVE List V5
Vulnerability Description
An attacker can leverage this flaw to gradually erode available memory to the point where named crashes for lack of resources. Upon restart the attacker would have to begin again, but nevertheless there is the potential to deny service.
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 安全漏洞
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 9.18.7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OpenSSL 1.x和OpenSSL 3.0之间的更改暴露了命名中的一个缺陷，当在Diffie-Hellman模式下与OpenSSL 3.0.0及更高版本一起使用TKEY记录时，该缺陷会导致密钥处理中出现少量内存泄漏。攻击者可以利用此漏洞逐渐侵蚀可用内存，以至于命名的内存因缺乏资源而崩溃，重新启动后，攻击者将不得不重新开始，但
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 Branch 9.18 9.18.0 through versions before 9.18.7 -

II. Public POCs for CVE-2022-2906

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III. Intelligence Information for CVE-2022-2906

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Vendor Advisories for CVE-2022-2906 (1)

Mailing List Discussions for CVE-2022-2906 (1)

Other References for CVE-2022-2906 (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-2022-38177 7.5 HIGH Memory leak in ECDSA DNSSEC verification code
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-2022-2906

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