CVE-2022-21689
OnionShare is an open source tool that lets you securely and anonymously share files, host websites, and chat with friends using the Tor network.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.39%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 1.39% probability · 71th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-400
- Affected
- onionshare/onionshare
- Source
- security-advisories@github.com
References
- https://github.com/onionshare/onionshare/releases/tag/v2.5Release Notes, Third Party Advisory
- https://github.com/onionshare/onionshare/security/advisories/GHSA-jh82-c5jw-pxpcThird Party Advisory
- https://github.com/onionshare/onionshare/releases/tag/v2.5Release Notes, Third Party Advisory
- https://github.com/onionshare/onionshare/security/advisories/GHSA-jh82-c5jw-pxpcThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.