github - ghsa-x723-g4p2-w8m5

GHSA-X723-G4P2-W8M5

Vulnerability from github – Published: 2022-05-24 17:20 – Updated: 2022-05-24 17:20

Details

Buffer over-reads were discovered in the CoAP library in Arm Mbed OS 5.15.3. The CoAP parser is responsible for parsing received CoAP packets. The function sn_coap_parser_options_parse() parses CoAP input linearly using a while loop. Once an option is parsed in a loop, the current point (*packet_data_pptr) is increased correspondingly. The pointer is restricted by the size of the received buffer, as well as by the option delta and option length bytes. The actual input packet length is not verified against the number of bytes read when processing the option extended delta and the option extended length. Moreover, the calculation of the message_left variable, in the case of non-extended option deltas, is incorrect and indicates more data left for processing than provided in the function input. All of these lead to heap-based or stack-based memory location read access that is outside of the intended boundary of the buffer. Depending on the platform-specific memory management mechanisms, it can lead to processing of unintended inputs or system memory access violation errors.

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{
  "affected": [],
  "aliases": [
    "CVE-2020-12883"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-119"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2020-06-18T19:15:00Z",
    "severity": "MODERATE"
  },
  "details": "Buffer over-reads were discovered in the CoAP library in Arm Mbed OS 5.15.3. The CoAP parser is responsible for parsing received CoAP packets. The function sn_coap_parser_options_parse() parses CoAP input linearly using a while loop. Once an option is parsed in a loop, the current point (*packet_data_pptr) is increased correspondingly. The pointer is restricted by the size of the received buffer, as well as by the option delta and option length bytes. The actual input packet length is not verified against the number of bytes read when processing the option extended delta and the option extended length. Moreover, the calculation of the message_left variable, in the case of non-extended option deltas, is incorrect and indicates more data left for processing than provided in the function input. All of these lead to heap-based or stack-based memory location read access that is outside of the intended boundary of the buffer. Depending on the platform-specific memory management mechanisms, it can lead to processing of unintended inputs or system memory access violation errors.",
  "id": "GHSA-x723-g4p2-w8m5",
  "modified": "2022-05-24T17:20:51Z",
  "published": "2022-05-24T17:20:51Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-12883"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ARMmbed/mbed-os/issues/12925"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ARMmbed/mbed-os/issues/12926"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ARMmbed/mbed-os/issues/12927"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ARMmbed/mbed-coap/pull/116"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2020-12883 (GCVE-0-2020-12883)

Vulnerability from cvelistv5 – Published: 2020-06-18 18:24 – Updated: 2024-08-04 12:11

Summary

Severity ?

No CVSS data available.

CWE

Assigner

mitre

References

URL

Tags

	https://github.com/ARMmbed/mbed-os/issues/12925	x_refsource_MISC
	https://github.com/ARMmbed/mbed-os/issues/12926	x_refsource_MISC
	https://github.com/ARMmbed/mbed-os/issues/12927	x_refsource_MISC
	https://github.com/ARMmbed/mbed-coap/pull/116	x_refsource_CONFIRM

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        "references": [
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            "tags": [
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            "url": "https://github.com/ARMmbed/mbed-os/issues/12925"
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            "url": "https://github.com/ARMmbed/mbed-os/issues/12927"
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Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-X723-G4P2-W8M5

CVE-2020-12883 (GCVE-0-2020-12883)

Tags

Sightings

Nomenclature