ghsa-r2hr-4v48-fjv3
Vulnerability from github
Impact
A Nautobot user with admin privileges can modify the BANNER_TOP, BANNER_BOTTOM, and BANNER_LOGIN configuration settings via the /admin/constance/config/ endpoint. Normally these settings are used to provide custom banner text at the top and bottom of all Nautobot web pages (or specifically on the login page in the case of BANNER_LOGIN) but it was reported that an admin user can make use of these settings to inject arbitrary HTML, potentially exposing Nautobot users to security issues such as cross-site scripting (stored XSS).
Patches
Has the problem been patched? What versions should users upgrade to?
Patches will be released as part of Nautobot 1.6.22 and 2.2.4.
Workarounds
Is there a way for users to fix or remediate the vulnerability without upgrading?
As described in the Nautobot documentation, these settings are only configurable through the admin UI of Nautobot if they are not explicitly set to some non-empty value in the nautobot_config.py or equivalent Nautobot configuration file. Therefore, adding the following configuration to said file completely mitigates this vulnerability in both Nautobot 1.x and 2.x:
python
BANNER_LOGIN = " "
BANNER_TOP = " "
BANNER_BOTTOM = " "
or alternately (Nautobot 2.x only), if those variables are not defined explicitly in your configuration file, setting the following environment variables for the Nautobot user account serves the same purpose:
shell
NAUTOBOT_BANNER_LOGIN=" "
NAUTOBOT_BANNER_TOP=" "
NAUTOBOT_BANNER_BOTTOM=" "
Limiting all users who do not need elevated privileges to non-admin access (is_superuser: False and is_staff: False) is a partial mitigation as well.
References
- https://github.com/nautobot/nautobot/pull/5697
- https://github.com/nautobot/nautobot/pull/5698
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "nautobot"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.6.22"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "PyPI",
"name": "nautobot"
},
"ranges": [
{
"events": [
{
"introduced": "2.0.0"
},
{
"fixed": "2.2.4"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2024-34707"
],
"database_specific": {
"cwe_ids": [
"CWE-79"
],
"github_reviewed": true,
"github_reviewed_at": "2024-05-13T19:59:26Z",
"nvd_published_at": "2024-05-14T15:39:30Z",
"severity": "HIGH"
},
"details": "### Impact\n\nA Nautobot user with admin privileges can modify the `BANNER_TOP`, `BANNER_BOTTOM`, and `BANNER_LOGIN` configuration settings via the `/admin/constance/config/` endpoint. Normally these settings are used to provide custom banner text at the top and bottom of all Nautobot web pages (or specifically on the login page in the case of `BANNER_LOGIN`) but it was reported that an admin user can make use of these settings to inject arbitrary HTML, potentially exposing Nautobot users to security issues such as cross-site scripting (stored XSS).\n\n### Patches\n_Has the problem been patched? What versions should users upgrade to?_\n\nPatches will be released as part of Nautobot 1.6.22 and 2.2.4.\n\n### Workarounds\n_Is there a way for users to fix or remediate the vulnerability without upgrading?_\n\nAs [described in the Nautobot documentation](https://docs.nautobot.com/projects/core/en/stable/user-guide/administration/configuration/optional-settings/#administratively-configurable-settings), these settings are only configurable through the admin UI of Nautobot if they are *not* explicitly set to some non-empty value in the `nautobot_config.py` or equivalent Nautobot configuration file. Therefore, adding the following configuration to said file completely mitigates this vulnerability in both Nautobot 1.x and 2.x:\n\n```python\nBANNER_LOGIN = \" \"\nBANNER_TOP = \" \"\nBANNER_BOTTOM = \" \"\n```\n\nor alternately (Nautobot 2.x only), if those variables are not defined explicitly in your configuration file, setting the following environment variables for the Nautobot user account serves the same purpose:\n\n```shell\nNAUTOBOT_BANNER_LOGIN=\" \"\nNAUTOBOT_BANNER_TOP=\" \"\nNAUTOBOT_BANNER_BOTTOM=\" \"\n```\n\nLimiting all users who do not need elevated privileges to non-admin access (`is_superuser: False` and `is_staff: False`) is a partial mitigation as well.\n\n\n### References\n\n- https://github.com/nautobot/nautobot/pull/5697\n- https://github.com/nautobot/nautobot/pull/5698",
"id": "GHSA-r2hr-4v48-fjv3",
"modified": "2024-05-14T20:04:15Z",
"published": "2024-05-13T19:59:26Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/nautobot/nautobot/security/advisories/GHSA-r2hr-4v48-fjv3"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-34707"
},
{
"type": "WEB",
"url": "https://github.com/nautobot/nautobot/pull/5697"
},
{
"type": "WEB",
"url": "https://github.com/nautobot/nautobot/pull/5698"
},
{
"type": "WEB",
"url": "https://github.com/nautobot/nautobot/commit/4f0a66bd6307bfe0e0acb899233e0d4ad516f51c"
},
{
"type": "WEB",
"url": "https://github.com/nautobot/nautobot/commit/f640aedc69c848d3d1be57f0300fc40033ff6423"
},
{
"type": "PACKAGE",
"url": "https://github.com/nautobot/nautobot"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:H/A:L",
"type": "CVSS_V3"
}
],
"summary": "Nautobot\u0027s BANNER_* configuration can be used to inject arbitrary HTML content into Nautobot pages"
}
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.