CVE-2021-27186
HIGHCVSS 7.5/10EPSS 1.99%
Last modified
CVE-2021-27186 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 1.99% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Treasuredata | Fluent Bit | 1.6.10 |
References
- https://github.com/fluent/fluent-bit/issues/3044Exploit, Third Party Advisory
- https://github.com/fluent/fluent-bit/pull/3045Exploit, Patch, Third Party Advisory
- https://github.com/fluent/fluent-bit/pull/3047Patch, Third Party Advisory
- https://github.com/fluent/fluent-bit/issues/3044Exploit, Third Party Advisory
- https://github.com/fluent/fluent-bit/pull/3045Exploit, Patch, Third Party Advisory
- https://github.com/fluent/fluent-bit/pull/3047Patch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-27186?
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 a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.99% probability of exploitation in the next 30 days.
How do I fix CVE-2021-27186?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2021-27186?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST