CVE-2021-22570 (GCVE-0-2021-22570)

Vulnerability from cvelistv5 – Published: 2022-01-26 00:00 – Updated: 2025-04-21 13:56
VLAI
Title
Nullptr Dereference in Protobuf
Summary
Nullptr dereference when a null char is present in a proto symbol. The symbol is parsed incorrectly, leading to an unchecked call into the proto file's name during generation of the resulting error message. Since the symbol is incorrectly parsed, the file is nullptr. We recommend upgrading to version 3.15.0 or greater.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
Google LLC Protobuf Affected: unspecified , < 3.15.0 (custom)
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-03T02:08:44+00:00",
      "cve": "CVE-2021-22570",
      "id": "CVE-2021-22570",
      "initial_release_date": "2021-01-01T00:00:00+00:00",
      "product_status:fixed": "209",
      "product_status:known_affected": "15",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "protobuf: Incorrect parsing of nullchar in the proto symbol leads to Nullptr dereference",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-22570.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-06-06T06:23:20Z",
      "cve": "CVE-2021-22570",
      "id": "CVE-2021-22570",
      "initial_release_date": "2023-02-15T03:45:55Z",
      "product_status:first_fixed": "18",
      "product_status:known_affected": "219",
      "product_status:recommended": "557",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2021-22570",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-22570.json",
      "version": "99"
    },
    "vulnrichment": {
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\"x_generator\": {\"engine\": \"Vulnogram 0.0.9\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"Nullptr dereference when a null char is present in a proto symbol. The symbol is parsed incorrectly, leading to an unchecked call into the proto file\u0027s name during generation of the resulting error message. Since the symbol is incorrectly parsed, the file is nullptr. We recommend upgrading to version 3.15.0 or greater.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-476\", \"description\": \"CWE-476 NULL Pointer Dereference\"}]}], \"providerMetadata\": {\"orgId\": \"14ed7db2-1595-443d-9d34-6215bf890778\", \"shortName\": \"Google\", \"dateUpdated\": \"2023-04-18T00:00:00.000Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-22570\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-04-21T13:56:58.459Z\", \"dateReserved\": \"2021-01-05T00:00:00.000Z\", \"assignerOrgId\": \"14ed7db2-1595-443d-9d34-6215bf890778\", \"datePublished\": \"2022-01-26T00:00:00.000Z\", \"assignerShortName\": \"Google\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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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.