dbartholomae lambda-middleware frameguard up to 1.0.4 JSON Mime-Type JsonDeserializer.ts redos

CVSS Meta Temp Score
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CTI Interest Score
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4.5$0-$5k0.00

Summaryinfo

A vulnerability was found in dbartholomae lambda-middleware frameguard up to 1.0.4. It has been declared as problematic. Affected is an unknown function of the file packages/json-deserializer/src/JsonDeserializer.ts of the component JSON Mime-Type Handler. Such manipulation leads to redos. This vulnerability is documented as CVE-2021-4437. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in dbartholomae lambda-middleware frameguard up to 1.0.4 (Middleware). Affected by this issue is some unknown processing of the file packages/json-deserializer/src/JsonDeserializer.ts of the component JSON Mime-Type Handler. The manipulation with an unknown input leads to a redos vulnerability. Using CWE to declare the problem leads to CWE-1333. The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles. Impacted is availability.

The weakness was released 07/25/2021 as 57. The advisory is available at github.com. This vulnerability is handled as CVE-2021-4437. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1449.003 by the MITRE ATT&CK project.

Upgrading to version 1.1.0 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch f689404d830cbc1edd6a1018d3334ff5f44dc6a6 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published 2 months after the disclosure of the vulnerability. The advisory contains the following remark:

Removed the regex used to identify a JSON mime-type as this was potentially vulnerable to 'Regular expression Denial of Service attacks' and making changes to make the regex more restrictive (but complia

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Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.5
VulDB Meta Temp Score: 4.5

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CNA Base Score: 3.5
CNA Vector (VulDB): 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Redos
CWE: CWE-1333 / CWE-400 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

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: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: lambda-middleware frameguard 1.1.0
Patch: f689404d830cbc1edd6a1018d3334ff5f44dc6a6

Timelineinfo

07/25/2021 🔍
08/31/2021 +37 days 🔍
02/11/2024 +894 days 🔍
02/11/2024 +0 days 🔍
10/12/2024 +244 days 🔍

Sourcesinfo

Advisory: 57
Status: Confirmed

CVE: CVE-2021-4437 (🔍)
GCVE (CVE): GCVE-0-2021-4437
GCVE (VulDB): GCVE-100-253406

Entryinfo

Created: 02/11/2024 09:46
Updated: 10/12/2024 06:28
Changes: 02/11/2024 09:46 (47), 03/03/2024 13:39 (2), 03/03/2024 13:45 (17), 10/12/2024 06:28 (34)
Complete: 🔍
Cache ID: 216::103

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