CVE-2021-27186 — HIGH (7.5)

Vulnerability Description

Fluent Bit 1.6.10 has a NULL pointer dereference when an flb_malloc return value is not validated by flb_avro.c or http_server/api/v1/metrics.c.

CVSS Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Treasuredata	Fluent Bit	1.6.10

Related Weaknesses (CWE)

CWE-476

References

https://github.com/fluent/fluent-bit/issues/3044ExploitThird Party Advisory
https://github.com/fluent/fluent-bit/pull/3045ExploitPatchThird Party Advisory
https://github.com/fluent/fluent-bit/pull/3047PatchThird Party Advisory
https://github.com/fluent/fluent-bit/issues/3044ExploitThird Party Advisory
https://github.com/fluent/fluent-bit/pull/3045ExploitPatchThird Party Advisory
https://github.com/fluent/fluent-bit/pull/3047PatchThird Party Advisory

FAQ

What is CVE-2021-27186?

CVE-2021-27186 is a vulnerability with a CVSS score of 7.5 (HIGH). Fluent Bit 1.6.10 has a NULL pointer dereference when an flb_malloc return value is not validated by flb_avro.c or http_server/api/v1/metrics.c.

How severe is CVE-2021-27186?

CVE-2021-27186 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-27186?

Check the references section above for vendor advisories and patch information. Affected products include: Treasuredata Fluent Bit.