In Nim 1.2.4, the standard library httpClient is vulnerable to a CR-LF injection in the target URL. An injection is possible if the attacker controls any part of the URL provided in a call (such as httpClient.get or httpClient.post), the User-Agent header value, or custom HTTP header names or values.
The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.
| Link | Tags |
|---|---|
| https://github.com/nim-lang/Nim/blob/dc5a40f3f39c6ea672e6dc6aca7f8118a69dda99/lib/pure/httpclient.nim#L1023 | third party advisory patch |
| https://nim-lang.org/blog/2020/07/30/versions-126-and-108-released.html | third party advisory release notes |
| http://www.openwall.com/lists/oss-security/2021/02/04/2 | mailing list third party advisory exploit |
| https://consensys.net/diligence/vulnerabilities/nim-httpclient-header-crlf-injection/ | third party advisory exploit |