CVE-2022-21695: Onionshare cli Improper Access Control Vulnerability
MODERATECVE-2022-21695 is a MODERATE (CVSS 4.3) improper access control vulnerability (CWE-287: Improper Authentication) affecting Onionshare cli libraries in the PyPI ecosystem. The issue involves improper access control in onionshare. Remediation is available by upgrading affected packages to version 2.5.
CVE-2022-21695 at a Glance
Security Impact
CVSS: 4.3
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N).
How to Fix CVE-2022-21695
To remediate this vulnerability, upgrade all affected Onionshare cli dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
pip install onionshare-cli>=2.5Run the following command in your project directory to verify that all resolved dependencies use the patched release:
pip show onionshare-cliHow to Check if You Are Affected
To determine whether your Python environment is affected by CVE-2022-21695, inspect your installed packages using pip:
pip show onionshare-cliAnalyze the terminal output to locate any version of Onionshare cli in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.5), your application is affected.
Note: The pip show onionshare-cli command checks currently installed packages in your active Python environment.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-287: Improper Authentication, where when an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. In Onionshare cli, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2022-21695 Affected Onionshare cli Versions
1 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
onionshare-cli
|
PyPI |
≥ 2.3
< 2.5
|
2.5
|
References
Frequently Asked Questions
What is CVE-2022-21695?
Which Onionshare cli versions are affected?
What version fixes CVE-2022-21695?
Is onionshare-cli affected?
What is the CVSS score of CVE-2022-21695?
What CWE is associated with CVE-2022-21695?
How can I check PyPI dependencies for CVE-2022-21695?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-99p8-9p2c-49j4",
"modified" : "2024-10-08T12:37:35Z",
"published" : "2022-01-21T23:20:16Z",
"aliases" : [ "CVE-2022-21695" ],
"summary" : "Improper Access Control in Onionshare",
"details" : "Between September 26, 2021 and October 8, 2021, [Radically Open Security](https://www.radicallyopensecurity.com/) conducted a penetration test of OnionShare 2.4, funded by the Open Technology Fund's [Red Team lab](https://www.opentech.fund/labs/red-team-lab/). This is an issue from that penetration test.\n\n- Vulnerability ID: OTF-009\n- Vulnerability type: Improper Access Control\n- Threat level: Low\n\n## Description:\n\nAuthenticated users (or unauthenticated in public mode) can send messages without being visible in the list of chat participants.\n\n## Technical description:\n\nPrerequisites:\n\n- Existing chatroom\n- Access to the chatroom (Public or known Private Key)\n- Either a modified frontend client or manual requests from burp/curl\n\nIf a user opens the chatroom without emitting the join message he will not be present in session.users[x] list. Therefore there is no listing in the frontend and no chat participant knows another party joined the chat. It is still possible to send messages in the chatroom.\n\nIf a user decides to abuse OTF-003 (page 22) he can impersonate messages from existing users; others would not be able to distinguish original and faked messages. This is also a prerequisite for OTF-004 (page 19).\n\n## Impact:\n\nAn adversary with access to the chat environment can send messages to the chat without being visible in the list of chat participants.\n\n## Recommendation:\n\n- Allow chat access only after emission of the join event.\n- Implement proper session handling.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N"
}, {
"type" : "CVSS_V4",
"score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "PyPI",
"name" : "onionshare-cli"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "2.3"
}, {
"fixed" : "2.5"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/onionshare/onionshare/security/advisories/GHSA-99p8-9p2c-49j4"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-21695"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/onionshare/onionshare"
}, {
"type" : "WEB",
"url" : "https://github.com/onionshare/onionshare/releases/tag/v2.5"
}, {
"type" : "WEB",
"url" : "https://github.com/pypa/advisory-database/tree/main/vulns/onionshare-cli/PYSEC-2022-46.yaml"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-287" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2022-01-19T19:40:50Z",
"nvd_published_at" : "2022-01-18T22:15:00Z"
}
}