CVE-2019-9749

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Source
https://cve.org/CVERecord?id=CVE-2019-9749
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-9749.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2019-9749
Published
2019-03-13T19:29:00.297Z
Modified
2026-07-08T19:01:54.784749Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

An issue was discovered in the MQTT input plugin in Fluent Bit through 1.0.4. When this plugin acts as an MQTT broker (server), it mishandles incoming network messages. After processing a crafted packet, the plugin's mqttpacketdrop function (in /plugins/inmqtt/mqttprot.c) executes the memmove() function with a negative size parameter. That leads to a crash of the whole Fluent Bit server via a SIGSEGV signal.

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
Last affected
de308c70d31e13bfaf86e979e0f74bced6b2e236
Database specific 
{
    "source": "CPE_RANGE",
    "cpe": "cpe:2.3:a:treasuredata:fluent_bit:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "1.0.4"
        }
    ]
}

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-0.9
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
v1.0.1
v1.0.2
v1.0.3
v1.0.4

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-9749.json"