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CVE-2020-15694

Date: August 14, 2020

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.

Language: C

Severity Score

Related Resources (8)

https://security-tracker.debian.org/tracker/CVE-2020-15694
https://github.com/nim-lang/Nim/blob/dc5a40f3f39c6ea672e6dc6aca7f8118a69dda99/lib/pure/httpclient.nim#L241
https://nim-lang.org/blog/2020/07/30/versions-126-and-108-released.html
http://www.openwall.com/lists/oss-security/2021/02/04/2
https://consensys.net/diligence/vulnerabilities/nim-httpclient-header-crlf-injection/
https://people.canonical.com/~ubuntu-security/cve/CVE-2020-15694
https://nvd.nist.gov/vuln/detail/CVE-2020-15694
https://www.mend.io/vulnerability-database/CVE-2020-15694

Severity Score

Weakness Type (CWE)

Improper Input Validation

CWE-20

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): HIGH
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): PARTIAL
Availability (A): NONE
Additional information:

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