Username spoofing in OnionShare
Between September 26, 2021 and October 8, 2021, Radically Open Security conducted a penetration test of OnionShare 2.4, funded by the Open Technology Fund's Red Team lab. This is an issue from that penetration test.
- Vulnerability ID: OTF-005
- Vulnerability type: Improper Input Sanitization
- Threat level: Low
Description:
It is possible to change the username to that of another chat participant with an additional space character at the end of the name string.
Technical description:
Assumed users in Chat:
- Alice
- Bob
- Mallory
- Mallory renames to
Alice. - Mallory sends message as
Alice. - Alice and Bob receive a message from Mallory disguised as
Alice, which is hard to distinguish from theAlicein the web interface.
Other (invisible) whitespace characters were found to be working as well.
Impact:
An adversary with access to the chat environment can use the rename feature to impersonate other participants by adding whitespace characters at the end of the username.
Recommendation:
- Remove non-visible characters from the username
Software afectado
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| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Python (PyPI) | onionshare-cli | >= 2.3, < 2.5 | 2.5 |
Referencias
- https://github.com/onionshare/onionshare/security/advisories/GHSA-68vr-8f46-vc9f
- https://github.com/onionshare/onionshare/releases/tag/v2.5
- https://nvd.nist.gov/vuln/detail/CVE-2022-21696
- https://github.com/onionshare/onionshare
- https://github.com/pypa/advisory-database/tree/main/vulns/onionshare-cli/PYSEC-2022-47.yaml
- Vector CVSS
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N- Debilidad (CWE)
CWE-20- Plataforma
- Python (PyPI)
- Paquete
onionshare-cli- Publicada
- 18.01.2022
- Actualizado
- 11.10.2026 11:20
Fuentes y licencias
OSV / GitHub Advisory Database - PYSEC-2022-47 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-68vr-8f46-vc9f - CC BY 4.0
Historial de vulnerabilidades: onionshare-cli
Todas las vulnerabilidades publicadas de este paquete (Python (PyPI)), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 13
- Primera → última
- 11.2021 07.2026
- Sin corrección
- 0
- Explotada en ataques
- 0
Distribución por gravedad
- Crítica 1
- Alta 2
- Media 10
Divulgaciones por año
- 2021: 2
- 2022: 9
- 2023: 0
- 2024: 0
- 2025: 0
- 2026: 2
-
Username spoofing in OnionShare esta entrada
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