GHSA-JHMR-57CJ-Q6G9
Vulnerability from github – Published: 2025-08-12 00:13 – Updated: 2025-08-12 00:13
VLAI
Summary
Komari vulnerable to 2FA Authentication Bypass
Details
Summary
Logic error in 2FA verification condition allows bypass of two-factor authentication
Details
https://github.com/komari-monitor/komari/blob/bd5a6934e1b79a12cf1e6a9bba5372d0e04f3abc/api/login.go#L55
There is no way for Verify2Fa to return an error AND true as ok at the same time, any codes are considered as valid.
PoC
Use any 6 digits as 2FA code
Impact
Bypass 2FA Authentication
Severity
{
"affected": [
{
"package": {
"ecosystem": "Go",
"name": "github.com/komari-monitor/komari"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.0.0-20250809064056-cc3d54bff4c6"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [],
"database_specific": {
"cwe_ids": [
"CWE-287"
],
"github_reviewed": true,
"github_reviewed_at": "2025-08-12T00:13:36Z",
"nvd_published_at": null,
"severity": "HIGH"
},
"details": "### Summary\n\nLogic error in 2FA verification condition allows bypass of two-factor authentication\n\n### Details\n\nhttps://github.com/komari-monitor/komari/blob/bd5a6934e1b79a12cf1e6a9bba5372d0e04f3abc/api/login.go#L55\n\nThere is no way for `Verify2Fa` to return an error **AND** true as `ok` at the same time, any codes are considered as valid.\n\n### PoC\n\nUse any 6 digits as 2FA code\n\n### Impact\n\nBypass 2FA Authentication",
"id": "GHSA-jhmr-57cj-q6g9",
"modified": "2025-08-12T00:13:37Z",
"published": "2025-08-12T00:13:36Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/komari-monitor/komari/security/advisories/GHSA-jhmr-57cj-q6g9"
},
{
"type": "WEB",
"url": "https://github.com/komari-monitor/komari/commit/cc3d54bff4c6495beaa1c7483379cd04542c557f"
},
{
"type": "PACKAGE",
"url": "https://github.com/komari-monitor/komari"
},
{
"type": "WEB",
"url": "https://github.com/komari-monitor/komari/blob/bd5a6934e1b79a12cf1e6a9bba5372d0e04f3abc/api/login.go#L55"
},
{
"type": "WEB",
"url": "https://github.com/komari-monitor/komari/releases/tag/1.0.4-fix1"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "Komari vulnerable to 2FA Authentication Bypass"
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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