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CVE-2020-15693

Date: August 14, 2020

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.

Language: C

Severity Score

Related Resources (8)

https://security-tracker.debian.org/tracker/CVE-2020-15693
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://github.com/nim-lang/Nim/blob/dc5a40f3f39c6ea672e6dc6aca7f8118a69dda99/lib/pure/httpclient.nim#L1023
https://consensys.net/diligence/vulnerabilities/nim-httpclient-header-crlf-injection/
https://nvd.nist.gov/vuln/detail/CVE-2020-15693
https://people.canonical.com/~ubuntu-security/cve/CVE-2020-15693
https://www.mend.io/vulnerability-database/CVE-2020-15693

Severity Score

Weakness Type (CWE)

Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

CWE-74

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): LOW
Integrity (I): LOW
Availability (A): NONE

CVSS v2

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

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