Denial of Service in Onionshare
CVE-2022-21689

7.5HIGH

Key Information:

Vendor

Onionshare

Status
Onionshare
Vendor
CVE Published:
18 January 2022

What is 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. 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.

Affected Version(s)

onionshare < 2.5

References

https://github.com/onionshare/onionshare/releases/tag/v2.5
x_refsource_MISC
https://github.com/onionshare/onionshare/security/advisor...
x_refsource_CONFIRM

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.