CVE-2022-21688 (GCVE-0-2022-21688)
Vulnerability from cvelistv5 – Published: 2022-01-18 21:45 – Updated: 2025-04-23 19:10
VLAI
EPSS
VEX
Title
Out-of-bounds Read in Onionshare
Summary
OnionShare is an open source tool that lets you securely and anonymously share files, host websites, and chat with friends using the Tor network. Affected versions of the desktop application were found to be vulnerable to denial of service via an undisclosed vulnerability in the QT image parsing. Roughly 20 bytes lead to 2GB memory consumption and this can be triggered multiple times. To be abused, this vulnerability requires rendering in the history tab, so some user interaction is required. An adversary with knowledge of the Onion service address in public mode or with authentication in private mode can perform a Denial of Service attack, which quickly results in out-of-memory for the server. This requires the desktop application with rendered history, therefore the impact is only elevated. This issue has been patched in version 2.5.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-23 15:58 UTC
CWE
- CWE-125 - Out-of-bounds Read
Assigner
GitHub_M
CNA
References
2 references
| URL | Tags |
|---|---|
| https://github.com/onionshare/onionshare/releases… | x_refsource_MISC |
| https://github.com/onionshare/onionshare/security… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| onionshare | onionshare |
Affected:
< 2.5
|
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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