Description

Nuclei is a vulnerability scanner powered by YAML based templates. Starting in version 3.0.0 and prior to version 3.3.2, a vulnerability in Nuclei's template signature verification system could allow an attacker to bypass the signature check and possibly execute malicious code via custom code template. The vulnerability is present in the template signature verification process, specifically in the `signer` package. The vulnerability stems from a discrepancy between how the signature verification process and the YAML parser handle newline characters, combined with the way multiple signatures are processed. This allows an attacker to inject malicious content into a template while maintaining a valid signature for the benign part of the template. CLI users are affected if they execute custom code templates from unverified sources. This includes templates authored by third parties or obtained from unverified repositories. SDK Users are affected if they are developers integrating Nuclei into their platforms, particularly if they permit the execution of custom code templates by end-users. The vulnerability is addressed in Nuclei v3.3.2. Users are strongly recommended to update to this version to mitigate the security risk. As an interim measure, users should refrain from using custom templates if unable to upgrade immediately. Only trusted, verified templates should be executed. Those who are unable to upgrade Nuclei should disable running custom code templates as a workaround.

Metrics

 

CVSS Version 4.0 CVSS Version 3.x CVSS Version 2.0

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

NIST: NVD

Base Score:  7.8 HIGH

Vector:  CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CNA:  GitHub, Inc.

Base Score:  7.4 HIGH

Vector:  CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N

CVSS 2.0 Severity and Vector Strings:

NIST: NVD

Base Score: N/A

NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink	Resource
https://github.com/projectdiscovery/nuclei/commit/0da993afe6d41b4b1b814e8fad23a2acba13c60a	Patch
https://github.com/projectdiscovery/nuclei/security/advisories/GHSA-7h5p-mmpp-hgmm	Mitigation  Third Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-78	Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')	NIST   GitHub, Inc.

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Change History

2 change records found show changes

Initial Analysis by NIST 10/01/2024 11:37:37 AM

Action	Type	Old Value	New Value
Added	CVSS V3.1		NIST AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Added	CWE		NIST CWE-78
Added	CPE Configuration		OR *cpe:2.3:a:projectdiscovery:nuclei:*:*:*:*:*:go:*:* versions from (including) 3.0.0 up to (excluding) 3.3.2
Changed	Reference Type	https://github.com/projectdiscovery/nuclei/commit/0da993afe6d41b4b1b814e8fad23a2acba13c60a No Types Assigned	https://github.com/projectdiscovery/nuclei/commit/0da993afe6d41b4b1b814e8fad23a2acba13c60a Patch
Changed	Reference Type	https://github.com/projectdiscovery/nuclei/security/advisories/GHSA-7h5p-mmpp-hgmm No Types Assigned	https://github.com/projectdiscovery/nuclei/security/advisories/GHSA-7h5p-mmpp-hgmm Mitigation, Third Party Advisory

New CVE Received from GitHub, Inc. 9/04/2024 12:15:06 PM

Action	Type	Old Value	New Value
Added	Description		Record truncated, showing 500 of 1496 characters. View Entire Change Record Nuclei is a vulnerability scanner powered by YAML based templates. Starting in version 3.0.0 and prior to version 3.3.2, a vulnerability in Nuclei's template signature verification system could allow an attacker to bypass the signature check and possibly execute malicious code via custom code template. The vulnerability is present in the template signature verification process, specifically in the `signer` package. The vulnerability stems from a discrepancy between how the signature verification
Added	CVSS V3.1		GitHub, Inc. AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N
Added	CWE		GitHub, Inc. CWE-78
Added	Reference		GitHub, Inc. https://github.com/projectdiscovery/nuclei/commit/0da993afe6d41b4b1b814e8fad23a2acba13c60a [No types assigned]
Added	Reference		GitHub, Inc. https://github.com/projectdiscovery/nuclei/security/advisories/GHSA-7h5p-mmpp-hgmm [No types assigned]