CVEvulnerability
CVE-2020-15694
7.5 HIGH
Official page ↗
- Status
- Modified
- Published
- 2020-08-14
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- CVSS 2.0 ([email protected])
- 5.0 MEDIUM — AV:N/AC:L/Au:N/C:N/I:P/A:N
- Weaknesses
- CWE-20
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.
Affected configurations
• nim-lang nim (<= 1.2.6)
Related
Weakness · CWE (1)
- CWE-20 Improper Input Validation weakness
References
- http://www.openwall.com/lists/oss-security/2021/02/04/2 Exploit, Mailing List, Third Party Advisory
- https://consensys.net/diligence/vulnerabilities/nim-httpclient-header-crlf-injection/ Exploit, Third Party Advisory
- https://github.com/nim-lang/Nim/blob/dc5a40f3f39c6ea672e6dc6aca7f8118a69dda99/lib/pure/httpclient.nim#L241 Patch, Third Party Advisory
- https://nim-lang.org/blog/2020/07/30/versions-126-and-108-released.html Release Notes, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/02/04/2 Exploit, Mailing List, Third Party Advisory
- https://consensys.net/diligence/vulnerabilities/nim-httpclient-header-crlf-injection/ Exploit, Third Party Advisory
- https://github.com/nim-lang/Nim/blob/dc5a40f3f39c6ea672e6dc6aca7f8118a69dda99/lib/pure/httpclient.nim#L241 Patch, Third Party Advisory
- https://nim-lang.org/blog/2020/07/30/versions-126-and-108-released.html Release Notes, Third Party Advisory