An issue was discovered in the character definitions of the Unicode Specification through 14.0. The specification allows an adversary to produce source code identifiers such as function names using homoglyphs that render visually identical to a target identifier. Adversaries can leverage this to inject code via adversarial identifier definitions in upstream software dependencies invoked deceptively in downstream software. NOTE: the Unicode Consortium offers the following alternative approach to presenting this concern. An issue is noted in the nature of international text that can affect applications that implement support for The Unicode Standard (all versions). Unless mitigated, an adversary could produce source code identifiers using homoglyph characters that render visually identical to but are distinct from a target identifier. In this way, an adversary could inject adversarial identifier definitions in upstream software that are not detected by human reviewers and are invoked deceptively in downstream software. The Unicode Consortium has documented this class of security vulnerability in its document, Unicode Technical Report #36, Unicode Security Considerations. The Unicode Consortium also provides guidance on mitigations for this class of issues in Unicode Technical Standard #39, Unicode Security Mechanisms.
References
Link | Resource |
---|---|
http://www.openwall.com/lists/oss-security/2021/11/01/1 | Mailing List Third Party Advisory |
http://www.openwall.com/lists/oss-security/2021/11/01/6 | Mailing List Third Party Advisory |
http://www.unicode.org/versions/Unicode14.0.0/ | Release Notes Vendor Advisory |
https://cwe.mitre.org/data/definitions/1007.html | Third Party Advisory |
https://security.gentoo.org/glsa/202210-09 | Third Party Advisory |
https://trojansource.codes | Third Party Advisory |
https://www.kb.cert.org/vuls/id/999008 | Third Party Advisory US Government Resource |
https://www.scyon.nl/post/trojans-in-your-source-code | Exploit Third Party Advisory |
https://www.unicode.org/reports/tr36/ | Technical Description Vendor Advisory |
https://www.unicode.org/reports/tr39/ | Technical Description Vendor Advisory |
Configurations
History
29 Oct 2024, 14:35
Type | Values Removed | Values Added |
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CWE | CWE-94 |
01 Aug 2024, 13:42
Type | Values Removed | Values Added |
---|---|---|
CWE | CWE-1007 |
07 Nov 2023, 03:39
Type | Values Removed | Values Added |
---|---|---|
Summary | An issue was discovered in the character definitions of the Unicode Specification through 14.0. The specification allows an adversary to produce source code identifiers such as function names using homoglyphs that render visually identical to a target identifier. Adversaries can leverage this to inject code via adversarial identifier definitions in upstream software dependencies invoked deceptively in downstream software. NOTE: the Unicode Consortium offers the following alternative approach to presenting this concern. An issue is noted in the nature of international text that can affect applications that implement support for The Unicode Standard (all versions). Unless mitigated, an adversary could produce source code identifiers using homoglyph characters that render visually identical to but are distinct from a target identifier. In this way, an adversary could inject adversarial identifier definitions in upstream software that are not detected by human reviewers and are invoked deceptively in downstream software. The Unicode Consortium has documented this class of security vulnerability in its document, Unicode Technical Report #36, Unicode Security Considerations. The Unicode Consortium also provides guidance on mitigations for this class of issues in Unicode Technical Standard #39, Unicode Security Mechanisms. |
Information
Published : 2021-11-01 04:15
Updated : 2024-10-29 14:35
NVD link : CVE-2021-42694
Mitre link : CVE-2021-42694
CVE.ORG link : CVE-2021-42694
JSON object : View
Products Affected
unicode
- unicode
CWE