CVE-2023-0401 (GCVE-0-2023-0401)

Vulnerability from cvelistv5 – Published: 2023-02-08 19:00 – Updated: 2025-11-04 19:14
VLAI
Title
NULL dereference during PKCS7 data verification
Summary
A NULL pointer can be dereferenced when signatures are being verified on PKCS7 signed or signedAndEnveloped data. In case the hash algorithm used for the signature is known to the OpenSSL library but the implementation of the hash algorithm is not available the digest initialization will fail. There is a missing check for the return value from the initialization function which later leads to invalid usage of the digest API most likely leading to a crash. The unavailability of an algorithm can be caused by using FIPS enabled configuration of providers or more commonly by not loading the legacy provider. PKCS7 data is processed by the SMIME library calls and also by the time stamp (TS) library calls. The TLS implementation in OpenSSL does not call these functions however third party applications would be affected if they call these functions to verify signatures on untrusted data.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • NULL pointer deference
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
OpenSSL OpenSSL Affected: 3.0.0 , < 3.0.8 (semver)
Create a notification for this product.
Date Public
2023-02-07 00:00
Credits
Hubert Kario (Red Hat) Dmitry Belyavsky (Red Hat) Tomáš Mráz
Show details on NVD website
To clipboard 

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In case the hash\\nalgorithm used for the signature is known to the OpenSSL library but\\nthe implementation of the hash algorithm is not available the digest\\ninitialization will fail. There is a missing check for the return\\nvalue from the initialization function which later leads to invalid\\nusage of the digest API most likely leading to a crash.\\n\\nThe unavailability of an algorithm can be caused by using FIPS\\nenabled configuration of providers or more commonly by not loading\\nthe legacy provider.\\n\\nPKCS7 data is processed by the SMIME library calls and also by the\\ntime stamp (TS) library calls. 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There is a missing check for the return\u003cbr\u003evalue from the initialization function which later leads to invalid\u003cbr\u003eusage of the digest API most likely leading to a crash.\u003cbr\u003e\u003cbr\u003eThe unavailability of an algorithm can be caused by using FIPS\u003cbr\u003eenabled configuration of providers or more commonly by not loading\u003cbr\u003ethe legacy provider.\u003cbr\u003e\u003cbr\u003ePKCS7 data is processed by the SMIME library calls and also by the\u003cbr\u003etime stamp (TS) library calls. The TLS implementation in OpenSSL does\u003cbr\u003enot call these functions however third party applications would be\u003cbr\u003eaffected if they call these functions to verify signatures on untrusted\u003cbr\u003edata.\u003cbr\u003e\u003cbr\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"description\": \"NULL pointer deference\"}]}], \"providerMetadata\": {\"orgId\": \"3a12439a-ef3a-4c79-92e6-6081a721f1e5\", \"shortName\": \"openssl\", \"dateUpdated\": \"2024-02-04T09:06:48.762Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-0401\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-04T19:14:37.338Z\", \"dateReserved\": \"2023-01-19T14:01:41.081Z\", \"assignerOrgId\": \"3a12439a-ef3a-4c79-92e6-6081a721f1e5\", \"datePublished\": \"2023-02-08T19:00:53.435Z\", \"assignerShortName\": \"openssl\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.