Viewing abuse filter 162: Suspected embedded archive inside PNG file (CSD#F9)

Filter parameters

Filter ID:	162
Description: (publicly viewable)
Filter group:
Statistics:	Of the last 493,806 actions, this filter has matched 0 (0%). On average, its run time is 0.08 ms, and it consumes 0.9 conditions of the condition limit.
Conditions: (documentation) (condition usage)	( user_editcount < 25 & user_age < 7 * 24 * 3600 /* a week / ) & action == "upload" & file_mime == "image/png" / only PNGs / & file_size > 3145728 + int(1.01 4 * file_bits_per_channel / 8 * file_width * file_height) ( user_editcount < 25 & user_age < 7 * 24 * 3600 /* a week / ) & action == "upload" & file_mime == "image/png" / only PNGs / & file_size > 3145728 + int(1.01 4 * file_bits_per_channel / 8 * file_width * file_height)
Notes:	PNG checking moved from rule #160. Because animated PNGs are possible, the rule doesn't trigger "disallow" action. --jdx (2016-12-01) Raised threshold to a safe value – anything bigger than 4 channels × 2 bytes/ch × W × H is a fake plain PNG or it is an animated PNG. --jdx (2016-12-02) Turned on "disallow" action due to considerable influx of huge PNGs in the last few days. --jdx (2016-12-13) Restricted the rule to very new users only. --jdx (2016-12-29) Added 1% margin for metadata. --jdx (2017-01-15) Implemented Dispenser's suggestions: Special:Diff/234120635. --jdx (2017-02-18)
Flags:	Hide details of this filter from public view Enable this filter Mark as deleted
Filter last modified:	18:54, 18 February 2017 by Jdx (talk \| contribs)
History:	View this filter's history
Tools:	Export this filter to another wiki {"data":{"rules":"( user_editcount \u003C 25 \u0026 user_age \u003C 7 * 24 * 3600 /* a week / )\r\n\u0026 action == \"upload\"\r\n\u0026 file_mime == \"image/png\" / only PNGs /\r\n\u0026 file_size \u003E 3145728 + int(1.01 4 * file_bits_per_channel / 8 * file_width * file_height)","name":"Suspected embedded archive inside PNG file (CSD#F9)","comments":"PNG checking moved from rule #160. Because animated PNGs are possible, the rule doesn't trigger \"disallow\" action.\r\n--jdx (2016-12-01)\r\n\r\nRaised threshold to a safe value \u2013 anything bigger than 4 channels \u00d7 2 bytes/ch \u00d7 W \u00d7 H is a fake plain PNG or it is an animated PNG.\r\n--jdx (2016-12-02)\r\n\r\nTurned on \"disallow\" action due to considerable influx of huge PNGs in the last few days.\r\n--jdx (2016-12-13)\r\n\r\nRestricted the rule to very new users only.\r\n--jdx (2016-12-29)\r\n\r\nAdded 1% margin for metadata.\r\n--jdx (2017-01-15)\r\n\r\nImplemented Dispenser's suggestions: Special:Diff/234120635.\r\n--jdx (2017-02-18)","group":"default","actions":{"disallow":[]},"enabled":true,"deleted":false,"privacylevel":0,"global":false},"actions":{"disallow":[]}}

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Viewing abuse filter 162: Suspected embedded archive inside PNG file (CSD#F9)

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