github - ghsa-ghhj-m687-4jqx

GHSA-GHHJ-M687-4JQX

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

Details

A buffer over-read was 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_multiple_options() parses CoAP options that may occur multiple consecutive times in a single packet. While processing the options, packet_data_pptr is accessed after being incremented by option_len without a prior out-of-bounds memory check. The temp_parsed_uri_query_ptr is validated for a correct range, but the range valid for temp_parsed_uri_query_ptr is derived from the amount of allocated heap memory, not the actual input size. Therefore the check of temp_parsed_uri_query_ptr may be insufficient for safe access to the area pointed to by packet_data_pptr. As a result, access to a memory area outside of the intended boundary of the packet buffer is made.

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{
  "affected": [],
  "aliases": [
    "CVE-2020-12884"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2020-06-18T19:15:00Z",
    "severity": "MODERATE"
  },
  "details": "A buffer over-read was 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_multiple_options() parses CoAP options that may occur multiple consecutive times in a single packet. While processing the options, packet_data_pptr is accessed after being incremented by option_len without a prior out-of-bounds memory check. The temp_parsed_uri_query_ptr is validated for a correct range, but the range valid for temp_parsed_uri_query_ptr is derived from the amount of allocated heap memory, not the actual input size. Therefore the check of temp_parsed_uri_query_ptr may be insufficient for safe access to the area pointed to by packet_data_pptr. As a result, access to a memory area outside of the intended boundary of the packet buffer is made.",
  "id": "GHSA-ghhj-m687-4jqx",
  "modified": "2022-05-24T17:20:51Z",
  "published": "2022-05-24T17:20:51Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-12884"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ARMmbed/mbed-os/issues/12928"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ARMmbed/mbed-coap/pull/116"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2020-12884 (GCVE-0-2020-12884)

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/12928	x_refsource_MISC
	https://github.com/ARMmbed/mbed-coap/pull/116	x_refsource_CONFIRM

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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-GHHJ-M687-4JQX

CVE-2020-12884 (GCVE-0-2020-12884)

Tags

Sightings

Nomenclature