CVE-2021-42694 (GCVE-0-2021-42694)
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
CWE
  • n/a
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.org http://www.openwall.com/lists/oss-security/2021/11/01/1 Mailing List, Third Party Advisory
cve@mitre.org http://www.openwall.com/lists/oss-security/2021/11/01/6 Mailing List, Third Party Advisory
cve@mitre.org http://www.unicode.org/versions/Unicode14.0.0/ Release Notes, Vendor Advisory
cve@mitre.org https://cwe.mitre.org/data/definitions/1007.html Third Party Advisory
cve@mitre.org https://security.gentoo.org/glsa/202210-09 Third Party Advisory
cve@mitre.org https://trojansource.codes Third Party Advisory
cve@mitre.org https://www.kb.cert.org/vuls/id/999008 Third Party Advisory, US Government Resource
cve@mitre.org https://www.scyon.nl/post/trojans-in-your-source-code Exploit, Third Party Advisory
cve@mitre.org https://www.unicode.org/reports/tr36/ Technical Description, Vendor Advisory
cve@mitre.org https://www.unicode.org/reports/tr39/ Technical Description, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 http://www.openwall.com/lists/oss-security/2021/11/01/1 Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 http://www.openwall.com/lists/oss-security/2021/11/01/6 Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 http://www.unicode.org/versions/Unicode14.0.0/ Release Notes, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 https://cwe.mitre.org/data/definitions/1007.html Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 https://security.gentoo.org/glsa/202210-09 Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 https://trojansource.codes Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 https://www.kb.cert.org/vuls/id/999008 Third Party Advisory, US Government Resource
af854a3a-2127-422b-91ae-364da2661108 https://www.scyon.nl/post/trojans-in-your-source-code Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 https://www.unicode.org/reports/tr36/ Technical Description, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 https://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": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"http://www.unicode.org/versions/Unicode14.0.0/\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://trojansource.codes\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2021/11/01/1\", \"name\": \"[oss-security] 20211101 CVE-2021-42574: rustc 1.56.0 and bidirectional-override codepoints in source code\", \"tags\": [\"mailing-list\", \"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2021/11/01/6\", \"name\": \"[oss-security] 20211101 Trojan Source Attacks\", \"tags\": [\"mailing-list\", \"x_transferred\"]}, {\"url\": \"https://www.kb.cert.org/vuls/id/999008\", \"name\": \"VU#999008\", \"tags\": [\"third-party-advisory\", \"x_transferred\"]}, {\"url\": \"https://www.scyon.nl/post/trojans-in-your-source-code\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://www.unicode.org/reports/tr36/\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://www.unicode.org/reports/tr39/\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://cwe.mitre.org/data/definitions/1007.html\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://security.gentoo.org/glsa/202210-09\", \"name\": \"GLSA-202210-09\", \"tags\": [\"vendor-advisory\", \"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-04T03:38:50.055Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"CHANGED\", \"version\": \"3.1\", \"baseScore\": 8.3, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"REQUIRED\", \"attackComplexity\": \"HIGH\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-42694\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-07-18T17:31:01.226978Z\"}}}], \"affected\": [{\"cpes\": [\"cpe:2.3:a:unicode:unicode:*:*:*:*:*:*:*:*\"], \"vendor\": \"unicode\", \"product\": \"unicode\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"14.0.0\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unknown\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-94\", \"description\": \"CWE-94 Improper Control of Generation of Code (\u0027Code Injection\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-07-18T17:36:54.824Z\"}}], \"cna\": {\"tags\": [\"disputed\"], \"affected\": [{\"vendor\": \"n/a\", \"product\": \"n/a\", \"versions\": [{\"status\": \"affected\", \"version\": \"n/a\"}]}], \"references\": [{\"url\": \"http://www.unicode.org/versions/Unicode14.0.0/\"}, {\"url\": \"https://trojansource.codes\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2021/11/01/1\", \"name\": \"[oss-security] 20211101 CVE-2021-42574: rustc 1.56.0 and bidirectional-override codepoints in source code\", \"tags\": [\"mailing-list\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2021/11/01/6\", \"name\": \"[oss-security] 20211101 Trojan Source Attacks\", \"tags\": [\"mailing-list\"]}, {\"url\": \"https://www.kb.cert.org/vuls/id/999008\", \"name\": \"VU#999008\", \"tags\": [\"third-party-advisory\"]}, {\"url\": \"https://www.scyon.nl/post/trojans-in-your-source-code\"}, {\"url\": \"https://www.unicode.org/reports/tr36/\"}, {\"url\": \"https://www.unicode.org/reports/tr39/\"}, {\"url\": \"https://cwe.mitre.org/data/definitions/1007.html\"}, {\"url\": \"https://security.gentoo.org/glsa/202210-09\", \"name\": \"GLSA-202210-09\", \"tags\": [\"vendor-advisory\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"An issue was discovered in the character definitions of the Unicode Specification through 14.0. 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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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