CSC-27 Reduce signing cert validity #42
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Considering the potential broad impacts of a revocation action with a Code Signing Certificate issued to the current max validity of 39 months, I’d like to propose we reduce the max validity to 15 months. This would reduce the amount of potentially impacted good code signed by a victim of a takeover attacks and help limit the time an attacker has to abuse a Code Signing Certificate. With that in mind, I’d like to propose the following language to be added to reduce the max validity for Code Signing Certificates to 15 months which includes an effective date for all newly issued Code Signing Certificates.
Considering the potential broad impacts of a revocation action with a Code Signing Certificate issued to the current max validity of 39 months, I’d like to propose we reduce the max validity to 15 months. This would reduce the amount of potentially impacted good code signed by a victim of a takeover attacks and help limit the time an attacker has to abuse a Code Signing Certificate. With that in mind, I’d like to propose the following language to be added to reduce the max validity for Code Signing Certificates to 15 months which includes an effective date for all newly issued Code Signing Certificates.
| @@ -2031,6 +2031,8 @@ Subscribers and Signing Services MAY sign Code at any point in the development o | |||
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| The validity period for a Code Signing Certificate issued to a Subscriber or Signing Service MUST NOT exceed 39 months. | |||
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| For all Code Signing Certificates issued after June 15, 2025, the validity period for the Code Signing Certificate issued to a Subscriber MUST NOT exceed 460 days. | |||
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@ianjmcm We discussed this over at the CSCWG today. I'd like to suggest merging line 2032 and 2034 into one:
The validity period for a Code Signing Certificate issued to a Subscriber MUST NOT exceed 39 months. For all Code Signing Certificates issued issued to a Subscriber after June 15, 2025, the validity period MUST NOT exceed 460 days.
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Considering the potential broad impacts of a revocation action with a Code Signing Certificate issued to the current max validity of 39 months, I’d like to propose we reduce the max validity to 460 days (~15 months). This would reduce the amount of potentially impacted good code signed by a victim of a takeover attacks and help limit the time an attacker has to abuse a Code Signing Certificate. With that in mind, I’d like to propose the following language to be added to reduce the max validity for Code Signing Certificates to 460 days which includes an effective date of June 15, 2025, for all newly issued Code Signing Certificates.