Forum Discussion

tminfw2's avatar
tminfw2
Icon for Nimbostratus rankNimbostratus
Jan 29, 2015

Bare byte decoding and French characters

Currently, our ASM policies are configured with bare byte decoding check activated. However, this poses problems, as some of our legitimate French pages are flagged with this error. Specifically, it ...
ASM Advanced WAF
management
security
swo0sh_gt_13163's avatar
swo0sh_gt_13163
Icon for Altostratus rankAltostratus
Mar 03, 2015

Hello Tomy,

 

I am facing the same trouble with Arabic characters. I did upgrade from 11.2.0 to 11.5.1 and started getting a lot of violation for Evasion Technique Detected, precisely "Bare Bye decoding". While going through the violation I Found that all the violations are triggered for non-ascii characters.

 

In my case, all the users are using IE only, and previous upgrade, BareByte Decoding was checked and it was working without making any noise.

 

It seems F5 has changed the ASCII character rendering or something with Bare Byte Decoding. Any comments?

 

Cheers! Darshan