Mar 27, 2026 - For details about updated CVE-2025-53521 (BIG-IP APM vulnerability), refer to K000156741.

Forum Discussion

crate_17871's avatar
crate_17871
Icon for Nimbostratus rankNimbostratus
Sep 04, 2017

Append characters within Content-Type Header

Hi DevCentral,   Is it possible to write an iRule to modify the   Content-Type: multipart/form-data; boundary=---------------------------114131096815017 to Content-Type: multipart/form-data; b...
application delivery
irules
LTM
security
Jad_Tabbara__J1's avatar
Jad_Tabbara__J1
Icon for Cirrostratus rankCirrostratus
Sep 05, 2017

Hello Crate,

Could you try the following irule 

when HTTP_REQUEST {

if { [HTTP::header "Content-Type"] contains "boundary=" } {
    log local0. "Content-Type value BEFORE : [HTTP::header "Content-Type"]"
    set content_type [HTTP::header "Content-Type"]
        if { [scan $content_type {%[^=]=%s} first second] == 2 } { 
            set new_content_type "$first=--$second"
            HTTP::header replace "Content-Type" $new_content_type
            log local0. "Content-Type value AFTER: [HTTP::header "Content-Type"]"
        }
    }
}

Hope it helps

Please give me a feedback

Regards