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CVE-2018-7159

Status Candidate

Overview

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.

Related Files

Red Hat Security Advisory 2019-2258-01
Posted Aug 6, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-2258-01 - The http-parser package provides a utility for parsing HTTP messages. It parses both requests and responses. The parser is designed to be used in performance HTTP applications. It does not make any system calls or allocations, it does not buffer data, and it can be interrupted at any time. Depending on your architecture, it only requires about 40 bytes of data per message stream. Issues addressed include a denial of service vulnerability.

tags | advisory, web, denial of service
systems | linux, redhat
advisories | CVE-2018-12121, CVE-2018-7159
SHA-256 | a82e1d573a16cba5a342f0b5010cdf157c4a79f635174f733dea14a524b4fbf3
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