When Eclipse Mosquitto version 1.0 to 1.5.5 (inclusive) is configured to use a password file for authentication, any malformed data in the password file will be treated as valid. This typically means that the malformed data becomes a username and no password. If this occurs, clients can circumvent authentication and get access to the broker by using the malformed username. In particular, a blank line will be treated as a valid empty username. Other security measures are unaffected. Users who have only used the mosquitto_passwd utility to create and modify their password files are unaffected by this vulnerability.
CVSS Details
- CVSS 3.1 Base Score: 8.1
- CVSS 3.0 Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade mosquitto | Nov 8, 2019 | Mar 27, 2019 |
| Debian | — | Upgrade mosquitto | Feb 11, 2019 | Feb 10, 2019 |
| Suse | — | Upgrade mosquittoUpgrade mosquitto-clientsUpgrade libmosquittopp1Upgrade mosquitto-develUpgrade libmosquitto1 | Feb 23, 2019 | Feb 10, 2019 |
| Ubuntu | — | Upgrade mosquitto | Nov 19, 2024 | Mar 27, 2019 |
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