Treasure Data Fluent Bit 1.7.1 flb_pack_msgpack_to_json_format use after free

CVSS Meta Temp Score
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CTI Interest Score
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6.5$0-$5k0.00

Summaryinfo

A vulnerability has been found in Treasure Data Fluent Bit 1.7.1 and classified as problematic. Affected by this issue is the function flb_pack_msgpack_to_json_format. This manipulation causes use after free. This vulnerability is registered as CVE-2021-46878. No exploit is available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability was found in Treasure Data Fluent Bit 1.7.1. It has been declared as problematic. Affected by this vulnerability is the function flb_pack_msgpack_to_json_format. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

An issue was discovered in Treasure Data Fluent Bit 1.7.1, erroneous parsing in flb_pack_msgpack_to_json_format leads to type confusion bug that interprets whatever is on the stack as msgpack maps and arrays, leading to use-after-free. This can be used by an attacker to craft a specially craft file and trick the victim opening it using the affect software, triggering use-after-free and execute arbitrary code on the target system.

The weakness was published 04/11/2023. It is possible to read the advisory at bugs.chromium.org. This vulnerability is known as CVE-2021-46878 since 03/29/2023. Technical details of the vulnerability are known, but there is no available exploit.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.6
VulDB Meta Temp Score: 6.5

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
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: Patch
Status: 🔍

0-Day Time: 🔍

Patch: github.com

Timelineinfo

03/29/2023 🔍
04/11/2023 +13 days 🔍
04/11/2023 +0 days 🔍
02/12/2025 +672 days 🔍

Sourcesinfo

Advisory: bugs.chromium.org
Status: Confirmed

CVE: CVE-2021-46878 (🔍)
GCVE (CVE): GCVE-0-2021-46878
GCVE (VulDB): GCVE-100-225655

Entryinfo

Created: 04/11/2023 21:25
Updated: 02/12/2025 00:29
Changes: 04/11/2023 21:25 (39), 02/12/2025 00:29 (26)
Complete: 🔍
Cache ID: 216::103

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