CVE-2021-41259

Nim is a systems programming language with a focus on efficiency, expressiveness, and elegance. In affected versions the uri.parseUri function which may be used to validate URIs accepts null bytes in the input URI. This behavior could be used to bypass URI validation. For example: parseUri("http://localhost\0hello").hostname is set to "localhost\0hello". Additionally, httpclient.getContent accepts null bytes in the input URL and ignores any data after the first null byte. Example: getContent("http://localhost\0hello") makes a request to localhost:80. An attacker can use a null bytes to bypass the check and mount a SSRF attack.

CVSS v3.0 9.8 CRITICAL
CVSS v2.0 7.5 HIGH

9.8^/10

CVSS v3.0 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.5^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:L/Au:N/C:P/I:P/A:P

Exploitability : 10.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://github.com/nim-lang/security/security/advisories/GHSA-3gg2-rw3q-qwgc	Exploit Third Party Advisory

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Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:nim-lang:nim:1.2.12:::::::*
	cpe:2.3:a:nim-lang:nim:1.4.4:::::::*
	cpe:2.3:a:nim-lang:nim:1.4.6:::::::*
	cpe:2.3:a:nim-lang:nim:1.4.8:::::::*
	cpe:2.3:a:nim-lang:nim:1.6.0:::::::*

Information

Published : 2021-11-12 10:15

Updated : 2021-11-17 07:45

NVD link : CVE-2021-41259

Mitre link : CVE-2021-41259

JSON object : View

CWE

CWE-918

Server-Side Request Forgery (SSRF)

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Products Affected

nim-lang

nim

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