CVE-2020-12886
Arm Mbed OS CoAP Buffer Read Vulnerability
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.
INFO
Published Date :
June 18, 2020, 7:15 p.m.
Last Modified :
June 25, 2020, 2:31 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.2
Exploitability Score :
3.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2020-12886.
| URL | Resource |
|---|---|
| https://github.com/ARMmbed/mbed-coap/pull/116 | Third Party Advisory |
| https://github.com/ARMmbed/mbed-os/issues/12948 | Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2020-12886 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-12886 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Jun. 25, 2020
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:N/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H Changed Reference Type https://github.com/ARMmbed/mbed-coap/pull/116 No Types Assigned https://github.com/ARMmbed/mbed-coap/pull/116 Third Party Advisory Changed Reference Type https://github.com/ARMmbed/mbed-os/issues/12948 No Types Assigned https://github.com/ARMmbed/mbed-os/issues/12948 Third Party Advisory Added CWE NIST CWE-125 Added CPE Configuration OR *cpe:2.3:o:arm:mbed_os:5.15.3:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-12886 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2020-12886
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.24 }} 0.00%
score
0.59817
percentile