CVE-2021-46878

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Source
https://cve.org/CVERecord?id=CVE-2021-46878
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-46878.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2021-46878
Aliases
Published
2023-04-11T18:15:58.340Z
Modified
2026-07-09T05:45:50.568284Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

An issue was discovered in Treasure Data Fluent Bit 1.7.1, erroneous parsing in flbpackmsgpacktojson_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.

References

Affected packages

Git / github.com/fluent/fluent-bit

Affected ranges

Type
GIT
Repo
https://github.com/fluent/fluent-bit
Events
Introduced
7edd2235cd2da7fe76258b7faa59ee9b37f52f8b
Last affected
7edd2235cd2da7fe76258b7faa59ee9b37f52f8b
Database specific
Show details 
{
    "cpe": "cpe:2.3:a:treasuredata:fluent_bit:1.7.1:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "1.7.1"
        },
        {
            "last_affected": "1.7.1"
        }
    ],
    "source": "CPE_STRING"
}

Affected versions

1.*
1.7.1
v1.*
v1.7.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-46878.json"