CVE-2020-35963

See a problem?
Please try reporting it to the source first.
Source
https://nvd.nist.gov/vuln/detail/CVE-2020-35963
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-35963.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2020-35963
Aliases
Published
2021-01-03T19:15:11Z
Modified
2025-10-21T05:53:47.642875Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

flbgzipcompress 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.

References

Affected packages

Git / github.com/fluent/fluent-bit

Affected ranges

Type
GIT
Repo
https://github.com/fluent/fluent-bit
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
cadff53c093210404aed01c4cf586adb8caa07af

Affected versions

0.*

0.13-dev-0.10
0.13-dev-0.11
0.13-dev-0.12
0.13-dev-0.13
0.13-dev-0.14
0.13-dev-0.15
0.13-dev-0.16
0.13-dev-0.17
0.13-dev-0.18
0.13-dev-0.4
0.13-dev-0.5
0.13-dev-0.6
0.13-dev-0.7
0.13-dev-0.8
0.13-dev-0.9

v0.*

v0.10.0
v0.11.0
v0.12.0
v0.12.1
v0.12.2
v0.12.3
v0.12.4
v0.13.0
v0.14.0
v0.3
v0.4
v0.5
v0.5.1
v0.6.0
v0.7.0
v0.8.0
v0.8.1
v0.8.2
v0.9.0

v1.*

v1.0.0
v1.1.0
v1.2.0
v1.3.0
v1.4.0
v1.5.0
v1.6.0

Database specific

vanir_signatures

[
    {
        "signature_version": "v1",
        "digest": {
            "function_hash": "57581972273330664649563572033679346079",
            "length": 1551.0
        },
        "deprecated": false,
        "signature_type": "Function",
        "source": "https://github.com/fluent/fluent-bit/commit/cadff53c093210404aed01c4cf586adb8caa07af",
        "target": {
            "function": "flb_gzip_compress",
            "file": "src/flb_gzip.c"
        },
        "id": "CVE-2020-35963-e15cec1a"
    },
    {
        "signature_version": "v1",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "78104538685687191706812304235110739877",
                "115090620069431853279167780948713951302",
                "189634672769753926143120117205069540212",
                "21512769843125165463443561585067901613",
                "319455758311923949884162954932813695046"
            ]
        },
        "deprecated": false,
        "signature_type": "Line",
        "source": "https://github.com/fluent/fluent-bit/commit/cadff53c093210404aed01c4cf586adb8caa07af",
        "target": {
            "file": "src/flb_gzip.c"
        },
        "id": "CVE-2020-35963-ed34a5e6"
    }
]