HTTP Client Response Validation Flaw in Nim 1.2.4
CVE-2020-15694

7.5HIGH

Key Information:

Vendor

Nim-lang

Status
Nim
Vendor
CVE Published:
14 August 2020

What is CVE-2020-15694?

In Nim version 1.2.4, the HTTP client within the standard library has a notable flaw in its response validation mechanism. This vulnerability arises because the httpClient does not accurately validate the server's response, allowing malicious actors to exploit this weakness. Specifically, when a server provides a negative Content-Length, the function httpClient.get().contentLength() does not trigger any error, potentially leading to unreliable and unsafe interactions with web services. As a result, applications utilizing this functionality may face security risks, emphasizing the need for developers to address this oversight in their implementations.

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References

https://github.com/nim-lang/Nim/blob/dc5a40f3f39c6ea672e6...
x_refsource_MISC
https://nim-lang.org/blog/2020/07/30/versions-126-and-108...
x_refsource_CONFIRM
http://www.openwall.com/lists/oss-security/2021/02/04/2
mailing-listx_refsource_MLIST

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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