Vulnerability Details : CVE-2022-21688
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.
Vulnerability category: Denial of service
Products affected by CVE-2022-21688
- cpe:2.3:a:onionshare:onionshare:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2022-21688
0.07%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 29 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2022-21688
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
4.3
|
MEDIUM | AV:N/AC:M/Au:N/C:N/I:N/A:P |
8.6
|
2.9
|
NIST | |
5.5
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
1.8
|
3.6
|
NIST | |
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
GitHub, Inc. |
CWE ids for CVE-2022-21688
-
The product reads data past the end, or before the beginning, of the intended buffer.Assigned by:
- nvd@nist.gov (Primary)
- security-advisories@github.com (Secondary)
References for CVE-2022-21688
-
https://github.com/onionshare/onionshare/security/advisories/GHSA-x7wr-283h-5h2v
OTF-014: Out-of-bounds Read: The desktop application was found to be vulnerable to denial of service via an undisclosed vulnerability in the QT image parsing · Advisory · onionshare/onionshare · GitHuThird Party Advisory
-
https://github.com/onionshare/onionshare/releases/tag/v2.5
Release OnionShare 2.5 · onionshare/onionshare · GitHubRelease Notes;Third Party Advisory
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