CVE-2018-7159— Joyent Node.js HTTP解析器输入验证错误漏洞

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The HTTP parser in all current versions of Node.js ignores spaces in the `Content-Length` header, allowing input such as `Content-Length: 1 2` to be interpreted as having a value of `12`. The HTTP specification does not allow for spaces in the `Content-Length` value and the Node.js HTTP parser has been brought into line on this particular difference. The security risk of this flaw to Node.js users is considered to be VERY LOW as it is difficult, and may be impossible, to craft an attack that makes use of this flaw in a way that could not already be achieved by supplying an incorrect value for `Content-Length`. Vulnerabilities may exist in user-code that make incorrect assumptions about the potential accuracy of this value compared to the actual length of the data supplied. Node.js users crafting lower-level HTTP utilities are advised to re-check the length of any input supplied after parsing is complete.

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输入的错误解释

Joyent Node.js HTTP解析器输入验证错误漏洞

Joyent Node.js是美国Joyent公司的一套建立在Google V8 JavaScript引擎之上的网络应用平台。该平台主要用于构建高度可伸缩的应用程序，以及编写能够处理数万条且同时连接到一个物理机的连接代码。 Joyent Node.js中的HTTP解析器存在输入验证漏洞，该漏洞源于程序忽略了‘Content-Length’标题中的空格。远程攻击者可利用该漏洞绕过安全限制。

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