Contiki-NG TinyDTLS up to 2018-08-30 dtls_sha256_update fragment length buffer overflow

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
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CTI Interest Score
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7.1$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Contiki-NG TinyDTLS up to 2018-08-30. This issue affects the function dtls_sha256_update. Such manipulation of the argument fragment length leads to buffer overflow. This vulnerability is referenced as CVE-2021-42147. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in Contiki-NG TinyDTLS up to 2018-08-30 and classified as critical. Affected by this issue is the function dtls_sha256_update. The manipulation of the argument fragment length with an unknown input leads to a buffer overflow vulnerability. Using CWE to declare the problem leads to CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. Impacted is availability.

The weakness was published 01/18/2024. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2021-42147. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 02/12/2024).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.2
VulDB Meta Temp Score: 7.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.1
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / 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: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/11/2021 🔍
01/17/2024 +828 days 🔍
01/18/2024 +0 days 🔍
02/12/2024 +25 days 🔍

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Not defined

CVE: CVE-2021-42147 (🔍)
GCVE (CVE): GCVE-0-2021-42147
GCVE (VulDB): GCVE-100-251420

Entryinfo

Created: 01/18/2024 00:58
Updated: 02/12/2024 08:28
Changes: 01/18/2024 00:58 (37), 02/12/2024 08:23 (2), 02/12/2024 08:28 (11)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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