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hguerrier's avatar
hguerrier
Icon for Nimbostratus rankNimbostratus
Apr 22, 2022

ASM Policy Blocking Scientific Notation in JSON Profile

When tuning an ASM Policy what would cause your JSON Profile to flag a payload as such:

 
Violation Details: Malformed JSON data [1]
JSON Buffer4.5600012001319145e
DescriptionMalformed document
Malformed numeric value
Context
Actual URL

/path/to/url

Wildcard URL

*path*

JSON Profile
Default
Applied Blocking SettingsBlock Alarm Learn

 

Attack Type

JSON Parser Attack

 

Payload:

{  
  ...
  "dpps": 4.5600012001319145e+22,
  "ddpse": 222
  ...
]

 

application delivery
security

1 Reply

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  • Gajji's avatar
    Gajji
    Icon for Cirrostratus rankCirrostratus
    May 01, 2022

    Enable the relax_unicode_in_json internal parameter.

    relax_unicode_in_json: The default is 0.
    When the value is changed to 1, a bad unicode character does not produce a JSON malformed violation. A bad unicode character might be a legal unicode character that does not appear in the mapping of the system's JSON parser.