cve-2021-42694
Vulnerability from cvelistv5
Published
2021-11-01 00:00
Modified
2024-10-29 13:41
Severity ?
8.3 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
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.
References
cve@mitre.orghttp://www.openwall.com/lists/oss-security/2021/11/01/1Mailing List, Third Party Advisory
cve@mitre.orghttp://www.openwall.com/lists/oss-security/2021/11/01/6Mailing List, Third Party Advisory
cve@mitre.orghttp://www.unicode.org/versions/Unicode14.0.0/Release Notes, Vendor Advisory
cve@mitre.orghttps://cwe.mitre.org/data/definitions/1007.htmlThird Party Advisory
cve@mitre.orghttps://security.gentoo.org/glsa/202210-09Third Party Advisory
cve@mitre.orghttps://trojansource.codesThird Party Advisory
cve@mitre.orghttps://www.kb.cert.org/vuls/id/999008Third Party Advisory, US Government Resource
cve@mitre.orghttps://www.scyon.nl/post/trojans-in-your-source-codeExploit, Third Party Advisory
cve@mitre.orghttps://www.unicode.org/reports/tr36/Technical Description, Vendor Advisory
cve@mitre.orghttps://www.unicode.org/reports/tr39/Technical Description, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2021/11/01/1Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2021/11/01/6Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.unicode.org/versions/Unicode14.0.0/Release Notes, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://cwe.mitre.org/data/definitions/1007.htmlThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202210-09Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://trojansource.codesThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.kb.cert.org/vuls/id/999008Third Party Advisory, US Government Resource
af854a3a-2127-422b-91ae-364da2661108https://www.scyon.nl/post/trojans-in-your-source-codeExploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.unicode.org/reports/tr36/Technical Description, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.unicode.org/reports/tr39/Technical Description, Vendor Advisory
Impacted products
Vendor Product Version
n/a n/a Version: n/a
Show details on NVD website

To clipboard 

{
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      vulnrichment: {
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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.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"text\", \"description\": \"n/a\"}]}], \"providerMetadata\": {\"orgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"shortName\": \"mitre\", \"dateUpdated\": \"2022-10-16T00:00:00\"}}}",
         cveMetadata: "{\"cveId\": \"CVE-2021-42694\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-10-29T13:41:17.179Z\", \"dateReserved\": \"2021-10-18T00:00:00\", \"assignerOrgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"datePublished\": \"2021-11-01T00:00:00\", \"assignerShortName\": \"mitre\"}",
         dataType: "CVE_RECORD",
         dataVersion: "5.1",
      },
   },
}


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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
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