dbcve.org
Sg350 10 FirmwareOperating system · Cisco

CVE-2017-12308

MEDIUM · 6.1 CVSS v3.1 Published 2018-01-18
Fix available
A fix is available. Upgrade to 1.4.9.4 or later.
See remediation →
68/100
Remediation priority · Elevated
Remotely reachable No privileges

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
A vulnerability in the web framework of Cisco Small Business Managed Switches software could allow an unauthenticated, remote attacker to conduct an HTTP response splitting attack against a user of the web interface of an affected system. The vulnerability is due to insufficient input validation of some parameters that are passed to the web server of the affected system. An attacker could exploit this vulnerability by convincing a user to follow a malicious link or by intercepting a user request and injecting malicious code into the request. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected web interface or allow the attacker to access sensitive browser-based information. This vulnerability affects the following Cisco Small Business 300 and 500 Series Managed Switches: Cisco 350 Series Managed Switches, Cisco 350X Series Stackable Managed Switches, Cisco 550X Series Stackable Managed Switches, Cisco ESW2 Series Advanced Switches, Cisco Small Business 300 Series Managed Switches, Cisco Small Business 500 Series Stackable Managed Switches. Cisco Bug IDs: CSCvg29980.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

Insufficient input validation on web server parameters in Cisco Small Business Managed Switches allows HTTP response splitting (CRLF injection). Attackers can inject carriage return/line feed characters to manipulate HTTP headers, enabling execution of arbitrary script code in the context of the web interface or access to sensitive browser-based information.

MitigationApply the Cisco firmware update addressing CSCvg29980, or implement input validation for HTTP parameters and consider web application firewall rules as a compensating control until patching is possible.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Sg350 10 FirmwareOperating system
Affected:>= 1.4.7.0, < 1.4.9.4
Sg350 10p FirmwareOperating system
Affected:>= 1.4.7.0, < 1.4.9.4
Sg350 10mp FirmwareOperating system
Affected:>= 1.4.7.0, < 1.4.9.4
Sg355 10p FirmwareOperating system
Affected:>= 1.4.7.0, < 1.4.9.4
Sg350 28 FirmwareOperating system
Affected:>= 1.4.7.0, < 1.4.9.4
Sg350 28p FirmwareOperating system
Affected:>= 1.4.7.0, < 1.4.9.4
Sg350 28mp FirmwareOperating system
Affected:>= 1.4.7.0, < 1.4.9.4
Sf350 48 FirmwareOperating system
Affected:>= 1.4.7.0, < 1.4.9.4

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

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

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify the switch model
    Locate the physical device label or access the CLI and run 'show systemid' or check the web interface header for the model number (Sg350-10, Sg350-10p, Sg350-10mp, Sg355-10p, Sg350-28, Sg350-28p, Sg350-28mp, or Sf350-48)
    Affected if The model is one of the eight affected variants listed in the CVE
  2. Check the firmware version
    Access the web interface and navigate to Administration > Firmware > Firmware Upgrade, or use the CLI command 'show version' to display the current firmware build number
    Affected if The firmware version is 1.4.7.0 or higher but lower than 1.4.9.4
  3. Verify web management interface status
    Confirm that the HTTP or HTTPS web interface is enabled by checking Administration > Management > HTTP/HTTPS settings in the web UI, or via CLI with 'show http server status'
    Affected if The web management interface is enabled and accessible on HTTP or HTTPS ports
  4. Test for CRLF injection susceptibility
    Send an HTTP request with CRLF characters (such as /login?param=test%0D%0AHeader:+value) to the web server and observe whether the response reflects injected headers
    Affected if The HTTP response contains the injected headers, indicating the input validation flaw is present

You are affected if you have one of the eight listed switch models, the web interface is enabled, and the firmware version falls within the range 1.4.7.0 to 1.4.9.3 inclusive.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Upgrade available Upgrade to 1.4.9.4 or later
Fixed in 1.4.9.4
Interim mitigation

Apply the Cisco firmware update addressing CSCvg29980, or implement input validation for HTTP parameters and consider web application firewall rules as a compensating control until patching is possible.

Fix this in Sg350 10 Firmware Scoped from the published advisory
  • Consultation3.0 h
  • Implementation4.0 h
  • Testing3.0 h
  • Review / QA2.0 h
12.0 hours of engineering $2,130
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,408.

Scan for this in your stack

Free · runs locally
dbcve dependency scanner

Check whether your project pulls in CVE-2017-12308 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.

Get it on GitHub Scan in the browser

References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2017-12308 in production — separate from our analysis above.

No notes yet

Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.

What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data