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CVE-2019-6474— A packet containing a malformed DUID can cause the kea-dhcp6 server to terminate

Quick assessment

Affected
ISC Kea
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 Kea DHCP是美国ISC公司的一款开源的DHCP（动态主机配置协议）服务器。 ISC Kea DHCP 1.4.0版本至1.5.0版本、1.6.0-beta1版本和1.6.0-beta2版本中存在输入验证错误漏洞。该漏洞源于网络系统或产品未对输入的数据进行正确的验证。

CVSS 5.7 · Medium EPSS 0.72% · P52

Possible ATT&CK Techniques 1 AI

T1059.001 · PowerShell
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I. Basic Information for CVE-2019-6474

Vulnerability Information
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Vulnerability Title
A packet containing a malformed DUID can cause the kea-dhcp6 server to terminate
Source: CVE Program / CVE List V5
Vulnerability Description
A missing check on incoming client requests can be exploited to cause a situation where the Kea server's lease storage contains leases which are rejected as invalid when the server tries to load leases from storage on restart. If the number of such leases exceeds a hard-coded limit in the Kea code, a server trying to restart will conclude that there is a problem with its lease store and give up. Versions affected: 1.4.0 to 1.5.0, 1.6.0-beta1, and 1.6.0-beta2
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/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 Kea DHCP 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ISC Kea DHCP是美国ISC公司的一款开源的DHCP（动态主机配置协议）服务器。 ISC Kea DHCP 1.4.0版本至1.5.0版本、1.6.0-beta1版本和1.6.0-beta2版本中存在输入验证错误漏洞。该漏洞源于网络系统或产品未对输入的数据进行正确的验证。
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 Kea 1.4.0 to 1.5.0 -

II. Public POCs for CVE-2019-6474

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III. Intelligence Information for CVE-2019-6474

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Other References for CVE-2019-6474 (1)

Same Patch Batch · ISC · 2019-10-16 · 3 CVEs total

CVE-2019-6472 6.5 MEDIUM A packet containing a malformed DUID can cause the kea-dhcp6 server to terminate
CVE-2019-6473 6.5 MEDIUM A packet containing a malformed DUID can cause the kea-dhcp6 server to terminate

IV. Related Vulnerabilities

Same product: Kea
Same vendor: ISC

V. Comments for CVE-2019-6474

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