View source for 4.2rev04

{{Infobox system menu
|reldateusa      = June 22, 2010
|reldatejap      = June 22, 2010
|reldateeur      = June 22, 2010
|reldatekor      = June 22, 2010
|addedios        = [[IOS80]]
|mobiusios       = [[IOS58]]
|changedios      = [[IOS9]], [[IOS12]], [[IOS13]], [[IOS14]], [[IOS15]], [[IOS17]], [[IOS21]], [[IOS28]], [[IOS31]], [[IOS33]], [[IOS34]], [[IOS35]], [[IOS36]], [[IOS37]], [[IOS38]], [[IOS55]], [[IOS56]], [[IOS57]], [[IOS61]]
|wiimpersonatorU = https://wii.marcan.st/wiimpersonator/reports/wii/USA/20100622-023732.log
|wiimpersonatorE = https://wii.marcan.st/wiimpersonator/reports/wii/EUR/20100622-023750.log
|wiimpersonatorJ = https://wii.marcan.st/wiimpersonator/reports/wii/JPN/20100622-023646.log
|wiimpersonatorK = https://wii.marcan.st/wiimpersonator/reports/wii/KOR/20100622-023915.log
|olderver        = 4.2rev03
|newerver        = 4.3
|parentrev       = 4.2
}}

The '''4.2rev04''' update was a batch [[IOS]] update released shortly before [[4.3]], much like [[3.4rev02]]. It provided various enhancements to IOSes in addition to blocking homebrew. [[IOSP]], [[ES]], and SDI were updated to versions built on March 1, 2010.

== Changes ==
* [[IOS9]] now has a build tag
** This version of IOS9 was released in Japan in 4.3
** [[IOS21]] still has this patch
* Several IOSes have been replaced with copies of other IOSes
** [[IOS13]], [[IOS14]], and [[IOS15]] have been replaced with copies of [[IOS17]]
*** These copies only differ in the version number stored in NCD
*** IOS15 no longer has the [[NAND Boot Program]]
** [[IOS31]], [[IOS33]], [[IOS34]], and [[IOS35]] have been replaced with copies of [[IOS36]]
*** Some of these IOSes were already identical, but the version number was updated to match IOS36
** In Korea, [[IOS41]], [[IOS43]], and [[IOS45]] have been replaced with copies of [[IOS46]]
*** Like the corresponding worldwide versions, some of these branches were already identical, but the version number was changed to match IOS46.
** [[IOS37]] and [[IOS53]] have been replaced with copies of [[IOS55]]
* Added [[IOS80]] to prepare for 4.3.
* [[ES]] now creates [[:/wfs]] on startup, although it is not used.
* Homebrew fixes
** Fixed [[HackMii Installer]] Userland+Syscall IOS exploit in all IOSes (including [[IOS58]], which was previously not on [[NUS]])
** ES_AddTitleFinish now checks signatures
** In Japan, IOS9, [[IOS57]], and [[IOS61]] were not updated, instead being updated in 4.3.
** The function used to verify pointers in the kernel seems to have been updated to take the process ID as a parameter instead of determining it automatically from the current thread. The function that required this change is not known.
** A bug was fixed in [[:/dev/sdio|SDI]] where the read and write IOCTLs used an int for the register index as opposed to a short. This allowed any memory accessible by SDI to be leaked to or rewritten by the [[Broadway]], and may have been used by the [[HackMii Installer]].
* Updated [[EULA]] in E and K regions.

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