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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.38%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a 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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 0.38% probability · 31th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- treasuredata/fluent bit
- Source
- cve@mitre.org
References
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26851Exploit, Issue Tracking, Patch, Third Party Advisory
- https://github.com/fluent/fluent-bit/pull/3100Patch
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26851Exploit, Issue Tracking, Patch, Third Party Advisory
- https://github.com/fluent/fluent-bit/pull/3100Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.