GHSA-3244-8mff-w398: Github.com/gotify/server Cross-Site Scripting Vulnerability
MODERATEGHSA-3244-8mff-w398 is a MODERATE cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Github.com/gotify/server libraries in the Go ecosystem. The issue involves reflected xss in gotify's /docs via import of outdated swagger ui. Remediation is available by upgrading affected packages to version 2.2.3.
GHSA-3244-8mff-w398 at a Glance
How to Fix GHSA-3244-8mff-w398
To remediate this vulnerability, upgrade all affected Github.com/gotify/server dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
Upgrade github.com/gotify/server to 2.2.3Run the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for github.com/gotify/serverHow to Check if You Are Affected
To determine whether your application is affected by GHSA-3244-8mff-w398, inspect your project dependencies for Github.com/gotify/server:
inspect dependencies for github.com/gotify/serverAnalyze the terminal output to locate any version of Github.com/gotify/server in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.2.3), your application is affected.
Note: Verify declared build manifests and deployed runtime container environments.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In Github.com/gotify/server, 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
GHSA-3244-8mff-w398 Affected Github.com/gotify/server Versions
1 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
github.com/gotify/server
|
Go |
< 2.2.3
|
2.2.3
|
References
Frequently Asked Questions
What is GHSA-3244-8mff-w398?
Which Github.com/gotify/server versions are affected?
What version fixes GHSA-3244-8mff-w398?
Is github.com/gotify/server affected?
What CWE is associated with GHSA-3244-8mff-w398?
How can I check Go dependencies for GHSA-3244-8mff-w398?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-3244-8mff-w398",
"modified" : "2023-01-10T22:48:43Z",
"published" : "2023-01-10T22:48:43Z",
"aliases" : [ ],
"summary" : "Reflected XSS in Gotify's /docs via import of outdated Swagger UI",
"details" : "### Impact\n\nGotify exposes an outdated instance of the [Swagger UI](https://swagger.io/tools/swagger-ui/) API documentation frontend at `/docs` which is susceptible to reflected XSS attacks when loading external Swagger config files.\n\nSpecifically, the DOMPurify version included with this version of Swagger UI is vulnerable to a [rendering XSS](https://www.vidocsecurity.com/blog/hacking-swagger-ui-from-xss-to-account-takeovers/) incorporating the mutation payload detailed in [CVE-2020-26870](https://research.securitum.com/mutation-xss-via-mathml-mutation-dompurify-2-0-17-bypass/) which was patched in 2021. This is further tracked in the GitHub Advisory Database as GHSA-QRMM-W75W-3WPX.\n\nAn attacker can execute arbitrary JavaScript and potentially take over the account of the user that clicked the link. Keep in mind, the Gotify UI won't natively expose such a malicious link, so an attacker has to get the user to open the malicious link in a context outside of Gotify.\n\n### Patches\n\nThe vulnerability has been fixed in version 2.2.3.\n\n### References\n\nhttps://github.com/gotify/server/pull/541",
"severity" : [ ],
"affected" : [ {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/gotify/server"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "2.2.3"
} ]
} ],
"database_specific" : {
"last_known_affected_version_range" : "<= 2.2.2"
}
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/gotify/server/security/advisories/GHSA-3244-8mff-w398"
}, {
"type" : "WEB",
"url" : "https://github.com/gotify/server/pull/541"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/gotify/server"
}, {
"type" : "WEB",
"url" : "https://research.securitum.com/mutation-xss-via-mathml-mutation-dompurify-2-0-17-bypass"
}, {
"type" : "WEB",
"url" : "https://www.vidocsecurity.com/blog/hacking-swagger-ui-from-xss-to-account-takeovers"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-79" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2023-01-10T22:48:43Z",
"nvd_published_at" : null
}
}