VulnerabilityModified
CVE-2020-35963
flb_gzip_compress in flb_gzip.c in Fluent Bit before 1.6.4 has an out-of-bounds write because it does not use the correct calculation of the maximum gzip data-size expansion.
HIGH 7.8EPSS 1.31%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.31%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
flb_gzip_compress in flb_gzip.c in Fluent Bit before 1.6.4 has an out-of-bounds write because it does not use the correct calculation of the maximum gzip data-size expansion.
- 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
- 1.31% probability · 69th 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=27261Exploit, Issue Tracking, Third Party Advisory
- https://fluentbit.io/announcements/v1.6.4/Release Notes, Vendor Advisory
- https://github.com/fluent/fluent-bit/commit/cadff53c093210404aed01c4cf586adb8caa07afPatch, Third Party Advisory
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=27261Exploit, Issue Tracking, Third Party Advisory
- https://fluentbit.io/announcements/v1.6.4/Release Notes, Vendor Advisory
- https://github.com/fluent/fluent-bit/commit/cadff53c093210404aed01c4cf586adb8caa07afPatch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.