Vulnerability CVE-2020-35963
Published: 2021-01-03

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.

Type:

CWE-787

CVSS2 => (AV:N/AC:M/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
6.8/10
6.4/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial

 References:
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=27261
https://fluentbit.io/announcements/v1.6.4/
https://github.com/fluent/fluent-bit/commit/cadff53c093210404aed01c4cf586adb8caa07af
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