CVE-2020-35963: treasuredata fluent_bit Out-of-bounds Write
CVSS: 7.8v3.1HighModified
Published 03-01-2021Last modified 04-08-2024
Vulnerability summary
CVE-2020-35963 is a high (CVSS 7.8) Out-of-bounds Write vulnerability in treasuredata fluent_bit. EPSS estimates a 1.33% chance of exploitation in the next 30 days, higher than 70.7% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
7.8/10
010
High · v3.1 (NVD)EPSS score
1.33%
0%100%
Low · +0.02 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Timeline
- 03-01-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
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 metrics
2 scores · 1 source · 2 versionsHigh 7.8Preferred score · NVD (NIST)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HSourcesSingle source
Medium 6.8Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
1.33%
Chance of exploitation in the next 30 days
Percentile
71%
Versus all other CVEs
30-day change
+0.02 pp
From 1.31% on 21-09-2026
21-09-202621-10-2026
EPSS score1.33%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (bugs.chromium.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Treasuredata1 product
- fluent_bit< 1.6.4
1 vendor · 1 product
References
3 links- bugs.chromium.org/p/oss-fuzz/issues/detail?id=27261X Refsource MISCExploitIssue TrackingThird Party Advisory
- github.com/fluent/fluent-bit/commit/cadff53c093210404aed01c4cf586adb8caa07afX Refsource MISCPatchThird Party Advisory