Back

MEDIUM

nodejs: HTTP parser allowed for spaces inside Content-Length header values

Published May 17, 2018

Description

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.

Affected products

Remediation

No remediation recorded yet.

Metrics

References (7)

Change history (0)

No recorded changes yet.

Sources
CVE.org / MITRE
Status PUBLISHED
Assigner nodejs
Published May 17, 2018
Updated Sep 17, 2024
Reserved Feb 15, 2018
NVD
Status Modified
Modified Jun 17, 2026
Red Hat
Severity Low
Public date Mar 8, 2018