CBOR up to 4.5.0 DecodeFromBytes algorithmic complexity

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in CBOR up to 4.5.0. This affects the function DecodeFromBytes. Such manipulation leads to algorithmic complexity. This vulnerability is referenced as CVE-2024-21909. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in CBOR up to 4.5.0 and classified as problematic. Affected by this issue is the function DecodeFromBytes. The manipulation with an unknown input leads to a algorithmic complexity vulnerability. Using CWE to declare the problem leads to CWE-407. An algorithm in a product has an inefficient worst-case computational complexity that may be detrimental to system performance and can be triggered by an attacker, typically using crafted manipulations that ensure that the worst case is being reached. Impacted is availability. CVE summarizes:

PeterO.Cbor versions 4.0.0 through 4.5.0 are vulnerable to a denial of service vulnerability. An attacker may trigger the denial of service condition by providing crafted data to the DecodeFromBytes or other decoding mechanisms in PeterO.Cbor. Depending on the usage of the library, an unauthenticated and remote attacker may be able to cause the denial of service condition.

The weakness was published 01/03/2024. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2024-21909 since 01/03/2024. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1499.

Upgrading to version 4.5.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2022-0486). Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

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

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Algorithmic complexity
CWE: CWE-407 / CWE-404
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: CBOR 4.5.1
Patch: github.com

Timelineinfo

01/03/2024 🔍
01/03/2024 +0 days 🔍
01/03/2024 +0 days 🔍
11/29/2025 +696 days 🔍

Sourcesinfo

Advisory: b4117dbbb4cd5a4a963f9d0c9aa132f033e15b95
Status: Confirmed

CVE: CVE-2024-21909 (🔍)
GCVE (CVE): GCVE-0-2024-21909
GCVE (VulDB): GCVE-100-249620
EUVD: 🔍

Entryinfo

Created: 01/03/2024 17:18
Updated: 11/29/2025 02:19
Changes: 01/03/2024 17:18 (39), 01/23/2024 16:16 (2), 01/23/2024 16:23 (11), 06/03/2025 19:24 (16), 11/29/2025 02:19 (1)
Complete: 🔍
Cache ID: 216:95D:103

Once again VulDB remains the best source for vulnerability data.

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