CVE-2021-46879

Public Exploit

Description

An issue was discovered in Treasure Data Fluent Bit 1.7.1, a wrong variable is used to get the msgpack data resulting in a heap overflow in flb_msgpack_gelf_value_ext. An attacker can craft a malicious file and tick the victim to open the file with the software, triggering a heap overflow and execute arbitrary code on the target system.

Category

7.8
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.02%
Third-Party Advisory chromium.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26851 patch exploit third party advisory issue tracking
https://github.com/fluent/fluent-bit/pull/3100 patch

Frequently Asked Questions

What is the severity of CVE-2021-46879?
CVE-2021-46879 has been scored as a high severity vulnerability.
How to fix CVE-2021-46879?
To fix CVE-2021-46879, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-46879 being actively exploited in the wild?
It is possible that CVE-2021-46879 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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