Responsible Disclosure by KPN-CERT

KPN-CERT will coordinate reported vulnerabilities with the affected vendor.

An appropriate timeframe for mitigation development and the type and schedule of disclosure will be determined based on the factors involved.  Extenuating circumstances, such as active exploitation, threats of an especially serious nature, or situations that require changes to an established standard may result in earlier or later disclosure. Other factors include

- Whether the vulnerability has already been publicly disclosed
- The severity of the vulnerability
- Potential impact to critical infrastructure
- Possible threat to public health and safety
- Immediate mitigations available
- Vendor responsiveness and feasibility for creating an upgrade or patch
- Vendor estimate of time required for customers to obtain, test and apply the patch

The name and contact information of the reporter will be forwarded to the affected vendors unless otherwise requested by the reporter. KPN-CERT will inform the reporter of significant changes in the status of any vulnerability reported to the extent possible without revealing information provided in confidence by the vendor.

Affected vendors will be apprised of any publication plans, and alternate publication schedules will be negotiated with affected vendors as required.

In cases where a vendor is unresponsive, or will not establish a reasonable timeframe for remediation, KPN-CERT may disclose vulnerabilities 45 days after the initial contact is made, regardless of the existence or availability of patches or workarounds from affected vendors.

It is the goal of this policy to balance the need of the telecommunications community to be informed of security vulnerabilities with the vendors' need for time to respond effectively. The final determination of the type and schedule of publication will be based on the best interests of the community overall.

The KPN-CERT vulnerability remediation process involves five basic steps:

- Detection/Collection—KPN-CERT collects vulnerability reports in three ways: KPN-CERT vulnerability analysis, monitoring public sources of vulnerability information, and direct notification of vulnerabilities to KPN-CERT. After receiving a report, KPN-CERT does an initial surface analysis to eliminate duplicates and false alarms. KPN-CERT then catalogues the vulnerabilities, including all of the information (public and private) that is known at that point.

- Analysis—Once the vulnerabilities are catalogued, vendor and KPN-CERT analysts work to understand the vulnerabilities by examining and identifying the issues, as well as the potential threat.

- Mitigation Coordination—After analysing a vulnerability, KPN-CERT will continue to work with the vendor for mitigation and patch issuance.  KPN-CERT has established secure and trusted partnerships with telecommunication equipment vendors for vulnerability disclosure and overall technology assessment and testing functions.  KPN-CERT will work with the vendors to allow sufficient time to effectively resolve and perform patch regression testing against any given vulnerability. Additionally KPN-CERT has experience successfully coordinating response to vulnerabilities that affects multi-vendor products.

- Application of Mitigation—KPN-CERT will work with the vendor to allow sufficient time for affected end users to obtain, test, and apply mitigation strategies prior to disclosure.

- Disclosure—After coordinating with vendors and gathering technical and threat information, KPN-CERT will take appropriate steps to notify end users about the vulnerability. KPN-CERT strives to disclose accurate, neutral, objective information focused on technical remediation and mitigation for asset owners and operators.  KPN-CERT will reference other available information and correct misinformation when possible.