CVE-2020-12886

CVSS V2 Medium 6.4 CVSS V3 Critical 9.1
Description
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() parses the CoAP packet header starting from the message token. The length of the token in the received message is provided in the first byte parsed by the sn_coap_parser_options_parse() function. The length encoded in the message is not validated against the actual input buffer length before accessing the token. As a result, memory access outside of the intended boundary of the buffer may occur.
Overview
  • CVE ID
  • CVE-2020-12886
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2020-06-18T19:15:11
  • Last Modified Date
  • 2020-06-25T14:31:37
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:o:arm:mbed_os:5.15.3:*:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:L/Au:N/C:P/I:N/A:P
  • Access Vector
  • NETWORK
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • PARTIAL
  • Integrity Impact
  • NONE
  • Availability Impact
  • PARTIAL
  • Base Score
  • 6.4
  • Severity
  • MEDIUM
  • Exploitability Score
  • 10
  • Impact Score
  • 4.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • HIGH
  • Base Score
  • 9.1
  • Base Severity
  • CRITICAL
  • Exploitability Score
  • 3.9
  • Impact Score
  • 5.2
References
Reference URL Reference Tags
https://github.com/ARMmbed/mbed-coap/pull/116 Third Party Advisory
https://github.com/ARMmbed/mbed-os/issues/12948 Third Party Advisory
History
Created Old Value New Value Data Type Notes
2022-05-10 16:42:02 Added to TrackCVE
2022-12-04 18:18:43 2020-06-18T19:15Z 2020-06-18T19:15:11 CVE Published Date updated
2022-12-04 18:18:43 2020-06-25T14:31:37 CVE Modified Date updated
2022-12-04 18:18:43 Analyzed Vulnerability Status updated