github - ghsa-mh95-3gr3-7p2r

GHSA-MH95-3GR3-7P2R

Vulnerability from github – Published: 2022-05-24 22:01 – Updated: 2022-05-24 22:01

Details

Buffer overflows were discovered in the CoAP library in Arm Mbed OS 5.14.0. 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 0xFF delimiter byte. Inside each while loop, the check of the value of packet_data_pptr is not strictly enforced. More specifically, inside a loop, packet_data_pptr could be increased and then dereferenced without checking. Moreover, there are many other functions in the format of sn_coap_parser_***() that do not check whether the pointer is within the bounds of the allocated buffer. All of these lead to heap-based or stack-based buffer overflows, depending on how the CoAP packet buffer is allocated.

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{
  "affected": [],
  "aliases": [
    "CVE-2019-17212"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2019-11-05T15:15:00Z",
    "severity": "HIGH"
  },
  "details": "Buffer overflows were discovered in the CoAP library in Arm Mbed OS 5.14.0. 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 0xFF delimiter byte. Inside each while loop, the check of the value of *packet_data_pptr is not strictly enforced. More specifically, inside a loop, *packet_data_pptr could be increased and then dereferenced without checking. Moreover, there are many other functions in the format of sn_coap_parser_****() that do not check whether the pointer is within the bounds of the allocated buffer. All of these lead to heap-based or stack-based buffer overflows, depending on how the CoAP packet buffer is allocated.",
  "id": "GHSA-mh95-3gr3-7p2r",
  "modified": "2022-05-24T22:01:03Z",
  "published": "2022-05-24T22:01:03Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-17212"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ARMmbed/mbed-os/issues/11803"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ARMmbed/mbed-os/blob/d91ed5fa42ea0f32e4422a3c562e7b045a17da40/features/frameworks/mbed-coap/source/sn_coap_parser.c#L257"
    },
    {
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      "url": "https://github.com/ARMmbed/mbed-os/blob/d91ed5fa42ea0f32e4422a3c562e7b045a17da40/features/frameworks/mbed-coap/source/sn_coap_parser.c#L301"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ARMmbed/mbed-os/blob/d91ed5fa42ea0f32e4422a3c562e7b045a17da40/features/frameworks/mbed-coap/source/sn_coap_parser.c#L310"
    },
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    },
    {
      "type": "WEB",
      "url": "https://github.com/ARMmbed/mbed-os/blob/d91ed5fa42ea0f32e4422a3c562e7b045a17da40/features/frameworks/mbed-coap/source/sn_coap_parser.c#L660"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2019-17212 (GCVE-0-2019-17212)

Vulnerability from cvelistv5 – Published: 2019-11-05 14:53 – Updated: 2024-08-05 01:33

Summary

Buffer overflows were discovered in the CoAP library in Arm Mbed OS 5.14.0. 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 0xFF delimiter byte. Inside each while loop, the check of the value of *packet_data_pptr is not strictly enforced. More specifically, inside a loop, *packet_data_pptr could be increased and then dereferenced without checking. Moreover, there are many other functions in the format of sn_coap_parser_****() that do not check whether the pointer is within the bounds of the allocated buffer. All of these lead to heap-based or stack-based buffer overflows, depending on how the CoAP packet buffer is allocated.

Severity ?

No CVSS data available.

CWE

Assigner

mitre

References

URL

Tags

	https://github.com/ARMmbed/mbed-os/blob/d91ed5fa4…	x_refsource_MISC
	https://github.com/ARMmbed/mbed-os/blob/d91ed5fa4…	x_refsource_MISC
	https://github.com/ARMmbed/mbed-os/blob/d91ed5fa4…	x_refsource_MISC
	https://github.com/ARMmbed/mbed-os/blob/d91ed5fa4…	x_refsource_MISC
	https://github.com/ARMmbed/mbed-os/blob/d91ed5fa4…	x_refsource_MISC
	https://github.com/ARMmbed/mbed-os/blob/d91ed5fa4…	x_refsource_MISC
	https://github.com/ARMmbed/mbed-os/issues/11803	x_refsource_MISC

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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-MH95-3GR3-7P2R

CVE-2019-17212 (GCVE-0-2019-17212)

Tags

Sightings

Nomenclature