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cve[email protected]CVE-2023-25657
HistoryFeb 21, 2023 - 9:15 p.m.

CVE-2023-25657

2023-02-2121:15:11
CWE-94
web.nvd.nist.gov
25
nautobot
nautobot 1.5.7
network source of truth
network automation platform
cve-2023-25657
remote code execution
jinja2 template engine
nautobot_config.py
sandbox environment enforceme

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

9.7 High

AI Score

Confidence

High

0.008 Low

EPSS

Percentile

81.9%

Nautobot is a Network Source of Truth and Network Automation Platform. All users of Nautobot versions earlier than 1.5.7 are impacted by a remote code execution vulnerability. Nautobot did not properly sandbox Jinja2 template rendering. In Nautobot 1.5.7 has enabled sandboxed environments for the Jinja2 template engine used internally for template rendering for the following objects: extras.ComputedField, extras.CustomLink, extras.ExportTemplate, extras.Secret, extras.Webhook. While no active exploits of this vulnerability are known this change has been made as a preventative measure to protect against any potential remote code execution attacks utilizing maliciously crafted template code. This change forces the Jinja2 template engine to use a SandboxedEnvironment on all new installations of Nautobot. This addresses any potential unsafe code execution everywhere the helper function nautobot.utilities.utils.render_jinja2 is called. Additionally, the documentation that had previously suggesting the direct use of jinja2.Template has been revised to suggest render_jinja2. Users are advised to upgrade to Nautobot 1.5.7 or newer. For users that are unable to upgrade to the latest release of Nautobot, you may add the following setting to your nautobot_config.py to apply the sandbox environment enforcement: TEMPLATES[1]["OPTIONS"]["environment"] = "jinja2.sandbox.SandboxedEnvironment" After applying this change, you must restart all Nautobot services, including any Celery worker processes. Note: Nautobot specifies two template engines by default, the first being β€œdjango” for the Django built-in template engine, and the second being β€œjinja” for the Jinja2 template engine. This recommended setting will update the second item in the list of template engines, which is the Jinja2 engine. For users that are unable to immediately update their configuration such as if a Nautobot service restart is too disruptive to operations, access to provide custom Jinja2 template values may be mitigated using permissions to restrict β€œchange” (write) actions to the affected object types listed in the first section.Note: This solution is intended to be stopgap until you can successfully update your nautobot_config.py or upgrade your Nautobot instance to apply the sandboxed environment enforcement.

Affected configurations

Vulners
NVD
Node
nautobotnautobot-plugin-device-onboardingRange<1.5.7
VendorProductVersionCPE
nautobotnautobot\-plugin\-device\-onboarding*cpe:2.3:a:nautobot:nautobot\-plugin\-device\-onboarding:*:*:*:*:*:*:*:*

CNA Affected

[
  {
    "vendor": "nautobot",
    "product": "nautobot",
    "versions": [
      {
        "version": "< 1.5.7",
        "status": "affected"
      }
    ]
  }
]

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

9.7 High

AI Score

Confidence

High

0.008 Low

EPSS

Percentile

81.9%

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