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CVE-2023-38698— ENS 输入验证错误漏洞

一分钟漏洞结论

影响对象
ensdomains ens-contracts
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。

ENS是以太坊域名服务的注册商和本地解析器的实现。 Ethereum Name Service 0.0.21及之前版本存在输入验证错误漏洞，该漏洞源于renew函数存在整数溢出问题，导致攻击者能够缩短registrar名称的持续时间。

CVSS 4.9 · Medium EPSS 0.85% · P57
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一、 漏洞 CVE-2023-38698 基础信息

漏洞信息
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Vulnerability Title
.eth registrar controller can shorten the duration of registered names
来源: CVE Program / CVE List V5
Vulnerability Description
Ethereum Name Service (ENS) is a distributed, open, and extensible naming system based on the Ethereum blockchain. According to the documentation, controllers are allowed to register new domains and extend the expiry of existing domains, but they cannot change the ownership or reduce the expiration time of existing domains. However, a preliminary analysis suggests that an attacker-controlled controller may be able to reduce the expiration time of existing domains due to an integer overflow in the renew function. The vulnerability resides `@ensdomains/ens-contracts` prior to version 0.0.22. If successfully exploited, this vulnerability would enable attackers to force the expiration of any ENS record, ultimately allowing them to claim the affected domains for themselves. Currently, it would require a malicious DAO to exploit it. Nevertheless, any vulnerability present in the controllers could potentially render this issue exploitable in the future. An additional concern is the possibility of renewal discounts. Should ENS decide to implement a system that offers unlimited .eth domains for a fixed fee in the future, the vulnerability could become exploitable by any user due to the reduced attack cost. Version 0.0.22 contains a patch for this issue. As long as registration cost remains linear or superlinear based on registration duration, or limited to a reasonable maximum (eg, 1 million years), this vulnerability could only be exploited by a malicious DAO. The interim workaround is thus to take no action.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
来源: CVE Program / CVE List V5
Vulnerability Title
ENS 输入验证错误漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
ENS是以太坊域名服务的注册商和本地解析器的实现。 Ethereum Name Service 0.0.21及之前版本存在输入验证错误漏洞，该漏洞源于renew函数存在整数溢出问题，导致攻击者能够缩短registrar名称的持续时间。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD

受影响产品

厂商 产品 影响版本 CPE 订阅
ensdomains ens-contracts <= 0.0.21 -

二、漏洞 CVE-2023-38698 的公开POC

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三、漏洞 CVE-2023-38698 的情报信息

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CVE-2023-38698 补丁与修复 (1)

CVE-2023-38698 厂商安全公告 (1)

CVE-2023-38698 其他参考 (1)

IV. Related Vulnerabilities

Same product: ens-contracts
Same vendor: ensdomains
Same weakness: CWE-190

V. Comments for CVE-2023-38698

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