Vulnerability Report

CVE-2020-12886

Title: Arm Mbed Os Memory Corruption

Memory Corruption

Proof Of Concept

No public PoC currently indexed for CVE-2020-12886.

CWE Category CWE-125
Published Date Jun 18, 2020
Modified Date Nov 21, 2024
Exploit Status Not Found
Score 9.1 CVSS v3.1
Exploit Probability (EPSS)
0.56%

Vulnerability Summary

CVE-2020-12886: 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.

Impacted Vendors

A
arm 1

Reference Links

https://github.com/ARMmbed/mbed-coap/pull/116 https://github.com/ARMmbed/mbed-os/issues/12948 https://github.com/ARMmbed/mbed-coap/pull/116 https://github.com/ARMmbed/mbed-os/issues/12948
CVSS v3.1
Source Entity [email protected]
Severity CRITICAL
9.1
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
CVSS v2.0
Source Entity [email protected]
Severity MEDIUM
6.4
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:N/AC:L/Au:N/C:P/I:N/A:P

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2020-12886 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Affected Stack

No specific products linked.