CVE-2022-4203 (GCVE-0-2022-4203)

Vulnerability from cvelistv5 – Published: 2023-02-24 14:53 – Updated: 2025-11-04 19:14
VLAI
Title
X.509 Name Constraints Read Buffer Overflow
Summary
A read buffer overrun can be triggered in X.509 certificate verification, specifically in name constraint checking. Note that this occurs after certificate chain signature verification and requires either a CA to have signed the malicious certificate or for the application to continue certificate verification despite failure to construct a path to a trusted issuer. The read buffer overrun might result in a crash which could lead to a denial of service attack. In theory it could also result in the disclosure of private memory contents (such as private keys, or sensitive plaintext) although we are not aware of any working exploit leading to memory contents disclosure as of the time of release of this advisory. In a TLS client, this can be triggered by connecting to a malicious server. In a TLS server, this can be triggered if the server requests client authentication and a malicious client connects.
Severity
4.9 (Medium)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • read buffer overrun
  • CWE-125 - Out-of-bounds Read
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
Corey Bonnell from Digicert Viktor Dukhovni
Show details on NVD website
To clipboard 

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Note that this occurs\\nafter certificate chain signature verification and requires either a\\nCA to have signed the malicious certificate or for the application to\\ncontinue certificate verification despite failure to construct a path\\nto a trusted issuer.\\n\\nThe read buffer overrun might result in a crash which could lead to\\na denial of service attack. In theory it could also result in the disclosure\\nof private memory contents (such as private keys, or sensitive plaintext)\\nalthough we are not aware of any working exploit leading to memory\\ncontents disclosure as of the time of release of this advisory.\\n\\nIn a TLS client, this can be triggered by connecting to a malicious\\nserver. In a TLS server, this can be triggered if the server requests\\nclient authentication and a malicious client connects.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"A read buffer overrun can be triggered in X.509 certificate verification,\u003cbr\u003especifically in name constraint checking. Note that this occurs\u003cbr\u003eafter certificate chain signature verification and requires either a\u003cbr\u003eCA to have signed the malicious certificate or for the application to\u003cbr\u003econtinue certificate verification despite failure to construct a path\u003cbr\u003eto a trusted issuer.\u003cbr\u003e\u003cbr\u003eThe read buffer overrun might result in a crash which could lead to\u003cbr\u003ea denial of service attack. In theory it could also result in the disclosure\u003cbr\u003eof private memory contents (such as private keys, or sensitive plaintext)\u003cbr\u003ealthough we are not aware of any working exploit leading to memory\u003cbr\u003econtents disclosure as of the time of release of this advisory.\u003cbr\u003e\u003cbr\u003eIn a TLS client, this can be triggered by connecting to a malicious\u003cbr\u003eserver. In a TLS server, this can be triggered if the server requests\u003cbr\u003eclient authentication and a malicious client connects.\u003cbr\u003e\u003cbr\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"description\": \"read buffer overrun\"}]}], \"providerMetadata\": {\"orgId\": \"3a12439a-ef3a-4c79-92e6-6081a721f1e5\", \"shortName\": \"openssl\", \"dateUpdated\": \"2024-02-04T09:06:39.738Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2022-4203\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-04T19:14:06.670Z\", \"dateReserved\": \"2022-11-29T10:00:42.027Z\", \"assignerOrgId\": \"3a12439a-ef3a-4c79-92e6-6081a721f1e5\", \"datePublished\": \"2023-02-24T14:53:08.485Z\", \"assignerShortName\": \"openssl\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Tags
Taxonomy of the tags.





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.