CVE selection for IDS/IPS signature rules

["Ravi Chunduru" <ravi.is.chunduru () gmail com>]

Hi,

There are over 30000 CVE vulnerability reports.  Many IDS/IPS devices
have around 4000-5000 signature rules. My guess is that these
signatures may cover (detect)around 4000-7000 attacks.  23000 to 26000
CVEs, that is, significant number of CVEs are not covered by IDS/IPS
devices.

I am guessing that there is reason for this. IDS/IPS vendors may be
selecting few CVEs for developing signatures. What is the selection
criteria followed in industry? One criteria, I know is that Network
IDS/IPS devices don't need to worry about attacks that can only be
mounted on the local machine, that is,  NIDS/NIPS devices only need to
worry about detection of attacks mounted remotely. Are there any other
considerations?

Thanks
Ravi

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