Rails - Aug 2012 - Earlier verions work around for "XSS Vulnerability in strip_tags" missing

Hello,

the rubyonrails-security announcement for CVE-2012-3465 "XSS 
Vulnerability in strip_tags" mentions that a work around for earlier 
versions should be attached, but there''s none, only patches for 3.0 
series and up.

Is the work around available? If so, where can I get hold of it?

Thanks in advance.

Best,
Peter