cve/2020/CVE-2020-15694.md

CVE-2020-15694

Description

In Nim 1.2.4, the standard library httpClient fails to properly validate the server response. For example, httpClient.get().contentLength() does not raise any error if a malicious server provides a negative Content-Length.

POC

Reference

• http://www.openwall.com/lists/oss-security/2021/02/04/2
• http://www.openwall.com/lists/oss-security/2021/02/04/2
• https://consensys.net/diligence/vulnerabilities/nim-httpclient-header-crlf-injection/
• https://consensys.net/diligence/vulnerabilities/nim-httpclient-header-crlf-injection/

Github

No PoCs found on GitHub currently.