Buffer overflow in Treasuredata Fluent Bit
CVE-2021-46879
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (29.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 29.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Treasuredata Fluent Bit — versions 1.7.1
Weakness classification (CWE)
References
- bugs.chromium.org/p/oss-fuzz/issues/detail (Exploit, Patch, Third Party Advisory, Issue Tracking)
- github.com/fluent/fluent-bit/pull/3100 (Patch)
Frequently asked questions
- What is CVE-2021-46879?
- CVE-2021-46879 is a high-severity vulnerability in Treasuredata Fluent Bit, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2023-04-11.
- How severe is CVE-2021-46879?
- High severity. CVSS v3 base score is 7.8 out of 10.