Description
In Eclipse Mosquito before and including 2.0.5, establishing a connection to the mosquitto server without sending data causes the EPOLLOUT event to be added, which results excessive CPU consumption. This could be used by a malicious actor to perform denial of service type attack. This issue is fixed in 2.0.6
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Eclipse | Mosquitto | ≤ 2.0.5 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | mosquitto | 2.0.7-1 | — |
| Debian 13 | mosquitto | 2.0.7-1 | — |
| Debian 12 | mosquitto | 2.0.7-1 | — |
Advisories 1
- WID-SEC-2023-2935 IBM Integration Bus: Mehrere Schwachstellen ermöglichen Denial of Service BSI CERT-Bund (WID) · Nov 15, 2023