ARM Mbed OS 5.15.3 CoAP Library sn_coap_parser_options_parse out-of-bounds

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in ARM Mbed OS 5.15.3. This impacts the function sn_coap_parser_options_parse of the component CoAP Library. The manipulation results in out-of-bounds. This vulnerability is cataloged as CVE-2020-12886. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical has been found in ARM Mbed OS 5.15.3. Affected is the function sn_coap_parser_options_parse of the component CoAP Library. The manipulation with an unknown input leads to a out-of-bounds vulnerability. CWE is classifying the issue as CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was shared 06/18/2020 (GitHub Repository). The advisory is shared for download at github.com. This vulnerability is traded as CVE-2020-12886 since 05/15/2020. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available.

Upgrading to version 5.15.3 eliminates this vulnerability.

The entries VDB-156921, VDB-156922, VDB-156923 and VDB-156925 are related to this item. Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.2
VulDB Meta Temp Score: 7.7

VulDB Base Score: 7.3
VulDB Temp Score: 6.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.1
NVD Vector: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Mbed OS 5.15.3

Timelineinfo

05/15/2020 🔍
06/18/2020 +34 days 🔍
06/19/2020 +1 days 🔍
10/25/2020 +128 days 🔍

Sourcesinfo

Advisory: github.com
Status: Not defined
Confirmation: 🔍

CVE: CVE-2020-12886 (🔍)
GCVE (CVE): GCVE-0-2020-12886
GCVE (VulDB): GCVE-100-156924
See also: 🔍

Entryinfo

Created: 06/19/2020 06:36
Updated: 10/25/2020 10:07
Changes: 06/19/2020 06:36 (41), 06/19/2020 06:41 (17), 10/25/2020 10:07 (1)
Complete: 🔍
Cache ID: 216::103

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