CVE - CVE-2021-42694

CVE-ID
CVE-2021-42694	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
DISPUTED 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
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
CERT-VN:VU#999008 URL:https://www.kb.cert.org/vuls/id/999008 GENTOO:GLSA-202210-09 URL:https://security.gentoo.org/glsa/202210-09 MISC:http://www.unicode.org/versions/Unicode14.0.0/ MISC:https://cwe.mitre.org/data/definitions/1007.html MISC:https://trojansource.codes MISC:https://www.scyon.nl/post/trojans-in-your-source-code MISC:https://www.unicode.org/reports/tr36/ MISC:https://www.unicode.org/reports/tr39/ MLIST:[oss-security] 20211101 CVE-2021-42574: rustc 1.56.0 and bidirectional-override codepoints in source code URL:http://www.openwall.com/lists/oss-security/2021/11/01/1 MLIST:[oss-security] 20211101 Trojan Source Attacks URL:http://www.openwall.com/lists/oss-security/2021/11/01/6
Assigning CNA
MITRE Corporation
Date Record Created
20211018	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20211018)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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