NULL pointer dereference in Treasuredata Fluent Bit
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.020 (79.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 79.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: 0.000
Affected products
- Treasuredata Fluent Bit — versions 1.6.10
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/fluent/fluent-bit/issues/3044 (Exploit, Third Party Advisory)
- github.com/fluent/fluent-bit/pull/3045 (Exploit, Patch, Third Party Advisory)
- github.com/fluent/fluent-bit/pull/3047 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-27186?
- CVE-2021-27186 is a high-severity vulnerability in Treasuredata Fluent Bit, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2021-02-10.
- How severe is CVE-2021-27186?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-27186 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.