CVE-2023-2975 (GCVE-0-2023-2975)

Vulnerability from cvelistv5 – Published: 2023-07-14 11:16 – Updated: 2025-04-23 16:20
VLAI
Title
AES-SIV implementation ignores empty associated data entries
Summary
Issue summary: The AES-SIV cipher implementation contains a bug that causes it to ignore empty associated data entries which are unauthenticated as a consequence. Impact summary: Applications that use the AES-SIV algorithm and want to authenticate empty data entries as associated data can be misled by removing, adding or reordering such empty entries as these are ignored by the OpenSSL implementation. We are currently unaware of any such applications. The AES-SIV algorithm allows for authentication of multiple associated data entries along with the encryption. To authenticate empty data the application has to call EVP_EncryptUpdate() (or EVP_CipherUpdate()) with NULL pointer as the output buffer and 0 as the input buffer length. The AES-SIV implementation in OpenSSL just returns success for such a call instead of performing the associated data authentication operation. The empty data thus will not be authenticated. As this issue does not affect non-empty associated data authentication and we expect it to be rare for an application to use empty associated data entries this is qualified as Low severity issue.
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-354 - Improper Validation of Integrity Check Value
Assigner
References
Impacted products
Vendor Product Version
OpenSSL OpenSSL Affected: 3.1.0 , < 3.1.2 (semver)
Affected: 3.0.0 , < 3.0.10 (semver)
Create a notification for this product.
Date Public
2023-07-07 00:00
Credits
Juerg Wullschleger (Google) Tomas Mraz
Show details on NVD website
To clipboard 

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      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://www.openssl.org/news/secadv/20230714.txt\", \"name\": \"OpenSSL Advisory\", \"tags\": [\"vendor-advisory\", \"x_transferred\"]}, {\"url\": \"https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=6a83f0c958811f07e0d11dfc6b5a6a98edfd5bdc\", \"name\": \"3.1.2 git commit\", \"tags\": [\"patch\", \"x_transferred\"]}, {\"url\": \"https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=00e2f5eea29994d19293ec4e8c8775ba73678598\", \"name\": \"3.0.10 git commit\", \"tags\": [\"patch\", \"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2023/07/15/1\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2023/07/19/5\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://security.netapp.com/advisory/ntap-20230725-0004/\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://security.gentoo.org/glsa/202402-08\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T06:41:04.070Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.3, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N\", \"integrityImpact\": \"LOW\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2023-2975\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-04-23T13:26:23.638671Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-04-23T14:38:20.736Z\"}}], \"cna\": {\"title\": \"AES-SIV implementation ignores empty associated data entries\", \"source\": {\"discovery\": \"UNKNOWN\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"reporter\", \"user\": \"00000000-0000-4000-9000-000000000000\", \"value\": \"Juerg Wullschleger (Google)\"}, {\"lang\": \"en\", \"type\": \"remediation developer\", \"user\": \"00000000-0000-4000-9000-000000000000\", \"value\": \"Tomas Mraz\"}], \"metrics\": [{\"other\": {\"type\": \"https://www.openssl.org/policies/secpolicy.html\", \"content\": {\"text\": \"Low\"}}, \"format\": \"other\"}], \"affected\": [{\"vendor\": \"OpenSSL\", \"product\": \"OpenSSL\", \"versions\": [{\"status\": \"affected\", \"version\": \"3.1.0\", \"lessThan\": \"3.1.2\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"3.0.0\", \"lessThan\": \"3.0.10\", \"versionType\": \"semver\"}], \"defaultStatus\": \"unaffected\"}], \"datePublic\": \"2023-07-07T00:00:00.000Z\", \"references\": [{\"url\": \"https://www.openssl.org/news/secadv/20230714.txt\", \"name\": \"OpenSSL Advisory\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=6a83f0c958811f07e0d11dfc6b5a6a98edfd5bdc\", \"name\": \"3.1.2 git commit\", \"tags\": [\"patch\"]}, {\"url\": \"https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=00e2f5eea29994d19293ec4e8c8775ba73678598\", \"name\": \"3.0.10 git commit\", \"tags\": [\"patch\"]}], \"x_generator\": {\"engine\": \"Vulnogram 0.1.0-dev\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"Issue summary: The AES-SIV cipher implementation contains a bug that causes\\nit to ignore empty associated data entries which are unauthenticated as\\na consequence.\\n\\nImpact summary: Applications that use the AES-SIV algorithm and want to\\nauthenticate empty data entries as associated data can be misled by removing,\\nadding or reordering such empty entries as these are ignored by the OpenSSL\\nimplementation. We are currently unaware of any such applications.\\n\\nThe AES-SIV algorithm allows for authentication of multiple associated\\ndata entries along with the encryption. To authenticate empty data the\\napplication has to call EVP_EncryptUpdate() (or EVP_CipherUpdate()) with\\nNULL pointer as the output buffer and 0 as the input buffer length.\\nThe AES-SIV implementation in OpenSSL just returns success for such a call\\ninstead of performing the associated data authentication operation.\\nThe empty data thus will not be authenticated.\\n\\nAs this issue does not affect non-empty associated data authentication and\\nwe expect it to be rare for an application to use empty associated data\\nentries this is qualified as Low severity issue.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"Issue summary: The AES-SIV cipher implementation contains a bug that causes\u003cbr\u003eit to ignore empty associated data entries which are unauthenticated as\u003cbr\u003ea consequence.\u003cbr\u003e\u003cbr\u003eImpact summary: Applications that use the AES-SIV algorithm and want to\u003cbr\u003eauthenticate empty data entries as associated data can be misled by removing,\u003cbr\u003eadding or reordering such empty entries as these are ignored by the OpenSSL\u003cbr\u003eimplementation. We are currently unaware of any such applications.\u003cbr\u003e\u003cbr\u003eThe AES-SIV algorithm allows for authentication of multiple associated\u003cbr\u003edata entries along with the encryption. To authenticate empty data the\u003cbr\u003eapplication has to call EVP_EncryptUpdate() (or EVP_CipherUpdate()) with\u003cbr\u003eNULL pointer as the output buffer and 0 as the input buffer length.\u003cbr\u003eThe AES-SIV implementation in OpenSSL just returns success for such a call\u003cbr\u003einstead of performing the associated data authentication operation.\u003cbr\u003eThe empty data thus will not be authenticated.\u003cbr\u003e\u003cbr\u003eAs this issue does not affect non-empty associated data authentication and\u003cbr\u003ewe expect it to be rare for an application to use empty associated data\u003cbr\u003eentries this is qualified as Low severity issue.\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-354\", \"description\": \"CWE-354 Improper Validation of Integrity Check Value\"}]}], \"providerMetadata\": {\"orgId\": \"3a12439a-ef3a-4c79-92e6-6081a721f1e5\", \"shortName\": \"openssl\", \"dateUpdated\": \"2024-10-14T14:55:45.748Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-2975\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-04-23T16:20:14.504Z\", \"dateReserved\": \"2023-05-30T10:29:34.539Z\", \"assignerOrgId\": \"3a12439a-ef3a-4c79-92e6-6081a721f1e5\", \"datePublished\": \"2023-07-14T11:16:25.151Z\", \"assignerShortName\": \"openssl\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.