CVE-2022-21689
Denial of Service in Onionshare
7.5
HIGH
CVSS 3.1
EPSS 0.41%
Description
OnionShare is an open source tool that lets you securely and anonymously share files, host websites, and chat with friends using the Tor network. In affected versions the receive mode limits concurrent uploads to 100 per second and blocks other uploads in the same second, which can be triggered by a simple script. An adversary with access to the receive mode can block file upload for others. There is no way to block this attack in public mode due to the anonymity properties of the tor network.
How to fix CVE-2022-21689
To remediate CVE-2022-21689, upgrade the affected package to a fixed version below.
- —upgrade to 2.2-3+deb11u1 or later
- —upgrade to 2.5 or later
- —upgrade to 2.5 or later
Is CVE-2022-21689 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 2.2-3+deb11u1
- from 0, < 2.5
- from 0, < 2.5
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |