Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Treasuredata | Fluent Bit | 1.7.1 |
Related Weaknesses (CWE)
References
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=27742ExploitIssue TrackingPatch
- https://github.com/fluent/fluent-bit/pull/3115Patch
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=27742ExploitIssue TrackingPatch
- https://github.com/fluent/fluent-bit/pull/3115Patch
FAQ
What is CVE-2021-46878?
CVE-2021-46878 is a vulnerability with a CVSS score of 7.8 (HIGH). 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...
How severe is CVE-2021-46878?
CVE-2021-46878 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-46878?
Check the references section above for vendor advisories and patch information. Affected products include: Treasuredata Fluent Bit.