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== PS1 Game Savedata == | == PS1 Game Savedata == | ||
=== | === Pinball Golden Logres (SuperLite 1500 Series) (NPJJ00460) by qwikrazor87 === | ||
Discovered around 2014-04- | Discovered around 2014-04-21 by qwikrazor87. | ||
Maybe not exploitable. | Maybe not exploitable. | ||
=== | === Noon (NPJJ00466) by qwikrazor87 === | ||
Discovered around 2014- | Discovered around 2014-10-03 by qwikrazor87. | ||
Maybe not exploitable. | Maybe not exploitable. | ||
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https://hackinformer.com/PlayStationGuide/PSV/_exploitgames.html | https://hackinformer.com/PlayStationGuide/PSV/_exploitgames.html | ||
=== Sports Superbike 2 (SLES03827) / XS Moto by qwikrazor87 | === Sports Superbike 2 (SLES03827) / XS Moto by qwikrazor87 and Acid_snake === | ||
Discovered around 2014-04-07 by qwikrazor87 | Discovered around 2014-04-07 by qwikrazor87 and Acid_snake. Released on 2015-03-12 in TN-X by Total_Noob. | ||
https://wololo.net/downloads/index.php/download/8275 | https://wololo.net/downloads/index.php/download/8275 | ||
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== POPS == | == POPS == | ||
=== POPS sandbox escape by qwikrazor87 and Acid_snake (TN-X) === | === POPS sandbox escape by qwikrazor87 and Acid_snake (TN-X) === | ||
Discovered | Discovered by qwikrazor87 and Acid_snake. Implemented in cef_psx and TN-X by Total_Noob. Released on 2015-03-12 in TN-X by Total_Noob. | ||
Due to the dynamic recompilation of POPS, any buffer overflow in a PS1 game that usually lets you control $ra is translated to native PSP code that lets you control parts of a register. This register contains a pointer where the system later <code>jalr</code> to. Because we do not control the entire register (due to memory address translations done by the dynarec), we can only address a fixed 4MB of RAM. Within these 4MB of RAM, you can find the pointer to the virtual memory card, that is loaded as a whole into RAM. VMC are plain text and there is no integrity check done to it at all. So you can read that pointer and jump to it, executing the VMC as a binary payload. Now the magic (never better said) comes from the fact that the VMC's magic number (first 4 bytes) are interpreted as a MIPS positive branch instruction (and the delay slot is effectively a NOP). This makes PSP (PSPemu) execute code well in the middle of the VMC, where you can inject your PSP usermode code payload. | Due to the dynamic recompilation of POPS, any buffer overflow in a PS1 game that usually lets you control $ra is translated to native PSP code that lets you control parts of a register. This register contains a pointer where the system later <code>jalr</code> to. Because we do not control the entire register (due to memory address translations done by the dynarec), we can only address a fixed 4MB of RAM. Within these 4MB of RAM, you can find the pointer to the virtual memory card, that is loaded as a whole into RAM. VMC are plain text and there is no integrity check done to it at all. So you can read that pointer and jump to it, executing the VMC as a binary payload. Now the magic (never better said) comes from the fact that the VMC's magic number (first 4 bytes) are interpreted as a MIPS positive branch instruction (and the delay slot is effectively a NOP). This makes PSP (PSPemu) execute code well in the middle of the VMC, where you can inject your PSP usermode code payload. | ||
https://wololo.net/2015/09/16/playstation-20th-anniversary-psx-exploits-work/ | https://wololo.net/2015/09/16/playstation-20th-anniversary-psx-exploits-work/ | ||
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== System == | == System == | ||
=== libtiff exploit # | === libtiff exploit #1 (TIFF Exploit 2.00): PSP <= 2.00 === | ||
Discovered on 2005-09-23 by Niacin and Skylark. | |||
The exploit involves using a wallpaper and a TIFF image file containing a buffer overflow. Since the data from the wallpaper is in a known location (VRAM), one can use the TIFF overflow to jump to the known VRAM location and execute userode code. | |||
Implemented in downgraders (like MPH downgrader to 1.50) and eLoader by Fanjita. | |||
https://en.wikibooks.org/wiki/PSP/Homebrew_History#The_TIFF_Exploit | |||
=== libtiff exploit #2 (TIFF Exploit 2.71): PSP <= 2.71 === | |||
Discovered in 2006-09. | |||
Implemented in Kriek eLoader and xLoader by Team N00bz. | |||
https:// | https://en.wikibooks.org/wiki/PSP/Homebrew_History#The_TIFF_Exploit | ||
=== libtiff exploit #3 (TIFF Exploit 4.20) by wololo: PSP <= 4.20 === | === libtiff exploit #3 (TIFF Exploit 4.20) by wololo: PSP <= 4.20 === | ||
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https://web.archive.org/web/20111226013924/http://secunia.com/advisories/31610/ | https://web.archive.org/web/20111226013924/http://secunia.com/advisories/31610/ | ||
=== libtiff exploit # | === libtiff exploit #4 (eggsploit) by Malloxis, Matiaz and davee: PSP <= 5.05 === | ||
Discovered in | Discovered in 2009-03-15 by Malloxis. Released on 2009-04-12 by Matiaz and davee. | ||
https://www.dcemu.co.uk/vbulletin/threads/197302-5-03-TIFF-Hello-World | |||
https:// | https://wololo.net/2009/04/13/eggsplanations/ | ||
https://www.youtube.com/watch?v=wV21QqQmX_o | |||
=== Unsigned System PRX allowed: PSP <= 6.20 === | === Unsigned System PRX allowed: PSP <= 6.20 === | ||
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Fixed: since PSP System Software version 6.30. | Fixed: since PSP System Software version 6.30. | ||
=== Old System PRX allowed | === Old System PRX allowed === | ||
Discovered around 2005. | Discovered around 2005. | ||
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Fixed: no. | Fixed: no. | ||
=== | === POPS memory card manager buffer overflow exploit by qwikrazor87 and Acid_snake === | ||
There is a buffer overflow vulnerability in POPS (PSP's PS1emu) memory card manager that potentially affects any PS1 game. One can overflow it with any PS1 game's name. qwikrazor87 and Acid_snake never went with this vulnerability as they were looking for an exploit compatible with PS Vita at the time. | |||
This vulnerability only affects PSP's PS1emu memory card manager, not PS1, PS2, PS3 or PS4' PS1emu memory card managers. | |||
= Kernel = | = Kernel = | ||
== UID planting Type Confusion | == kernel execution using encrypted UID planting Type Confusion kexploit by qwikrazor87 (Trinity, ARK-4): PS Vita <= 3.74 == | ||
https://theofficialflow.github.io/2019/06/18/trinity.html#type-confusion | https://theofficialflow.github.io/2019/06/18/trinity.html#type-confusion | ||
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It involves AES enc/dec (using sceChnnlsv buffer in kernel RAM for fake thread UID) for it to work with the sceKernelDeleteThread UID kexploit. | It involves AES enc/dec (using sceChnnlsv buffer in kernel RAM for fake thread UID) for it to work with the sceKernelDeleteThread UID kexploit. | ||
== | == kernel arbitrary read using sceNpCore_8AFAB4A0 double-fetch race condition kexploit by qwikrazor87 (Trinity, ARK-4): PS Vita <= 3.70 == | ||
https://theofficialflow.github.io/2019/06/18/trinity.html#double-fetch-race-condition | https://theofficialflow.github.io/2019/06/18/trinity.html#double-fetch-race-condition | ||
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https://github.com/PSP-Archive/ARK-4/blob/main/loader/live/kernel/kxploit/vita360/kxploit.c | https://github.com/PSP-Archive/ARK-4/blob/main/loader/live/kernel/kxploit/vita360/kxploit.c | ||
== VPL kexploit by qwikrazor87 or Total_Noob: PS Vita | == VPL kexploit by qwikrazor87 or Total_Noob: PS Vita 3.00-3.52 == | ||
[https://bitbucket.org/Acid_Snake/ark-4/src/master/kxploit/sceVpl/kxploit.c 3.00-3.35 from PROCFW] | [https://bitbucket.org/Acid_Snake/ark-4/src/master/kxploit/sceVpl/kxploit.c 3.00-3.35 from PROCFW] | ||
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https://bitbucket.org/Acid_Snake/ark-4/src/master/kxploit/vpl/kxploit.c 3.51-3.52 from TN-V] | https://bitbucket.org/Acid_Snake/ark-4/src/master/kxploit/vpl/kxploit.c 3.51-3.52 from TN-V] | ||
== | == sceKernelDeleteThread UID kexploit by qwikrazor87: PS Vita <= 3.50 == | ||
Discovered around 2014-10-20 by qwikrazor87. | |||
https://github.com/GuidoAlessandroMenichetti/kxploits/blob/master/(3.50)%20sceKernelDeleteThread/explanation.txt | |||
== _sceG729EncodeTermResource (free) kexploit by qwikrazor87 or Total_Noob: PS Vita <= 3.50 == | |||
Discovered around 2015-02-11. Released on 2015-04-18 by anonymous (probably qwikrazor87). | |||
https://bitbucket.org/Acid_Snake/ark-4/src/master/kxploit/sceG729/kxploit.c | https://bitbucket.org/Acid_Snake/ark-4/src/master/kxploit/sceG729/kxploit.c | ||
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https://pastebin.com/Sdz0XPRg | https://pastebin.com/Sdz0XPRg | ||
== | == sceVideocodec race condition kexploit by qwikrazor87: PS Vita 3.30-3.36 == | ||
Discovered around 2015-01-29. | |||
https://github.com/GuidoAlessandroMenichetti/kxploits/blob/master/(3.36)%20sceVideocodecStop/explanation.txt | https://github.com/GuidoAlessandroMenichetti/kxploits/blob/master/(3.36)%20sceVideocodecStop/explanation.txt | ||
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https://bitbucket.org/Acid_Snake/ark-4/src/master/kxploit/sceVideocodec/kxploit.c | https://bitbucket.org/Acid_Snake/ark-4/src/master/kxploit/sceVideocodec/kxploit.c | ||
== _sceSdGetLastIndex | == _sceSdGetLastIndex kexploit by qwikrazor87 (TN-X, TN-V): PS Vita 3.18-3.20 == | ||
Discovered around | Discovered around 2014-04-05 by qwikrazor87. | ||
There is a time-of-check to time-of-use exploit in chnnlsv. | There is a time-of-check to time-of-use exploit in chnnlsv. | ||
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https://github.com/PSP-Archive/ARK-4/blob/main/loader/live/kernel/kxploit/vita320/kxploit.c | https://github.com/PSP-Archive/ARK-4/blob/main/loader/live/kernel/kxploit/vita320/kxploit.c | ||
== _sceLoadCertFromFlash kexploit by Total_Noob (TN-V): PS Vita <= ?3.15? == | |||
== _sceLoadCertFromFlash kexploit by | |||
Discovered around 2013-10-22 | Discovered around 2013-10-22. | ||
https://github.com/GuidoAlessandroMenichetti/TN-Rev/blob/master/loader/main.c | https://github.com/GuidoAlessandroMenichetti/TN-Rev/blob/master/loader/main.c | ||
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https://bitbucket.org/Acid_Snake/ark-4/src/master/kxploit/sceLoadCertFromFlash/kxploit.c | https://bitbucket.org/Acid_Snake/ark-4/src/master/kxploit/sceLoadCertFromFlash/kxploit.c | ||
== sceRegRemoveCategory buffer overflow kexploit by Freddy_156 and some1: PS Vita <= ?2.11? == | == sceRegRemoveCategory buffer overflow kexploit by Freddy_156 and some1 (no implementation): PS Vita <= ?2.11? == | ||
Dicovered in 2011 by Freddy_156 and some1. Released on 2013-06-02 by Freddy_156. | Dicovered in 2011 by Freddy_156 and some1. Released on 2013-06-02 by Freddy_156. | ||
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== kermit_inet_socket kexploit by yosh, TheCobra and Frostegater (ARK, TN-A, TN-C): PS Vita <= 2.01 == | == kermit_inet_socket kexploit by yosh, TheCobra and Frostegater (ARK, TN-A, TN-C): PS Vita <= 2.01 == | ||
Discovered by yosh, TheCobra and Frostegater in 2012. Released on 2013-01-12 by yosh. | Discovered by yosh, Total_Noob, TheCobra and Frostegater in 2012. Released on 2013-01-12 by yosh. | ||
kermit_inet_socket (sceWlanDrv_lib_51B0BBB8) does not require an active WiFi connection. | kermit_inet_socket (sceWlanDrv_lib_51B0BBB8) does not require an active WiFi connection. | ||
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== sceWlanGetEtherAddr kexploit by yosh, TheCobra and Frostegater (VHBL, ARK): PS Vita 1.61-1.80 == | == sceWlanGetEtherAddr kexploit by yosh, TheCobra and Frostegater (VHBL, ARK): PS Vita 1.61-1.80 == | ||
Discovered by Yosh, TheCobra and Frostegater in 2012-07. Released (leaked) on 2012-11-01 by anonymous. | Discovered by Yosh, Total_Noob, TheCobra and Frostegater in 2012-07. Released (leaked) on 2012-11-01 by anonymous. | ||
In PSP System Software 6.60 sceWlanGetEtherAddr function is k1-checked but in PS Vita System Software <= 1.80 PSPemu it is not. | In PSP System Software 6.60 sceWlanGetEtherAddr function is k1-checked but in PS Vita System Software <= 1.80 PSPemu it is not. | ||
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TBD: implementation by CelesteBlue | TBD: implementation by CelesteBlue | ||
== sceNetMPulldown ( | == sceNetMPulldown (also called ifhandle 6.60-6.61) kexploit by davee (PROCFW, ME, Chronoswitch, Infinity 2): PSP <= 6.61 == | ||
https://github.com/uofw/uofwinst/blob/master/PXE/Launcher/kxp_660.c | https://github.com/uofw/uofwinst/blob/master/PXE/Launcher/kxp_660.c | ||
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https://wololo.net/2013/05/04/kernel-exploits-how-they-work-and-why-they-are-scarce/ | https://wololo.net/2013/05/04/kernel-exploits-how-they-work-and-why-they-are-scarce/ | ||
== | == ifhandle 5.70 race condition kexploit by davee: PSP 5.00-5.70, patched on PSP 6.20 == | ||
https://wololo.net/talk/viewtopic.php?p=147730#p147730 | https://wololo.net/talk/viewtopic.php?p=147730#p147730 | ||
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https://wololo.net/talk/viewtopic.php?p=147732#p147732 | https://wololo.net/talk/viewtopic.php?p=147732#p147732 | ||
== GEN/M33 contested | == GEN/M33 contested wlan exploit: PSP <= 5.50 == | ||
?? Ask davee. | |||
https://wololo.net/talk/viewtopic.php?p=147642#p147642 | https://wololo.net/talk/viewtopic.php?p=147642#p147642 | ||
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http://www.kingx.de/forum/showthread.php?tid=15275 | http://www.kingx.de/forum/showthread.php?tid=15275 | ||
This exploit clobbers 16 bytes of kernel memory, so it is needed to read kernel memory before exploiting and restore the other 12 after. | This exploit clobbers 16 bytes of kernel memory, so it is needed to read kernel memory before exploiting and restore the other 12 after. | ||
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https://www.hitchhikr.net/Exploit_2.6.zip | https://www.hitchhikr.net/Exploit_2.6.zip | ||
== reused index.dat key: PSP 2.00, 2.01 == | == reused index.dat key: PSP 2.00, 2.01 == | ||
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Fixed: since PSP System Software version 6.35. | Fixed: since PSP System Software version 6.35. | ||
= iplloader = | = Lib-PSP iplloader = | ||
== NMI Backdoor == | == NMI Backdoor == | ||
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Applicable to: None | Applicable to: None | ||
Vulnerable: iplloader (all | Vulnerable: Lib-PSP iplloader (all bootrom versions, 0.7.0 and newer Kbooti versions, PS Vita's PSP emulator bootrom) | ||
The iplloader bootrom (present within Tachyon's IC package) as well as iplloader versions 0.7.0 and onward feature a NMI/Interrupt handler backdoor (most likely used internally for debugging purposes) in its loader part at the very first instructions of the bootrom. | The Lib-PSP iplloader bootrom (present within Tachyon's IC package) as well as Lib-PSP iplloader versions 0.7.0 and onward feature a NMI/Interrupt handler backdoor (most likely used internally for debugging purposes) in its loader part at the very first instructions of the bootrom. | ||
This backdoor allows anyone in control of the memory location address 0xBC100000 to perform a jump to an arbitrary location defined in coprocessor register $9 | This backdoor allows anyone in control of the memory location address 0xBC100000 to perform a jump to an arbitrary location defined in coprocessor register $9 | ||
If value at address 0xBC100000 is not equal to 0 and coprocessor register $9 is set, iplloader will jump to the address set in the register very early in the code (by the 8th instruction). Else (if value at address 0xBC100000 is equal to 0), coprocessor register $9 will be reset back to 0. | If value at address 0xBC100000 is not equal to 0 and coprocessor register $9 is set, Lib-PSP iplloader will jump to the address set in the register very early in the code (by the 8th instruction). Else (if value at address 0xBC100000 is equal to 0), coprocessor register $9 will be reset back to 0. | ||
Below are the relevant pieces of code: | Below are the relevant pieces of code: | ||
Line 882: | Line 778: | ||
</pre> | </pre> | ||
This backdoor may allow an attacker performing a hardware based attack to set those values and gain iplloader time code execution. | This backdoor may allow an attacker performing a hardware based attack to set those values and gain Lib-PSP iplloader time code execution. | ||
== Arbitrary IPL Load Address == | == Arbitrary IPL Load Address == | ||
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Fixed: Partially in Tachyon 0x00600000. The CPU scratchpad (0xA0010000 uncached; 0x80010000 cached) range is now blacklisted, whilst all other addresses remain allowed. | Fixed: Partially in Tachyon 0x00600000. The CPU scratchpad (0xA0010000 uncached; 0x80010000 cached) range is now blacklisted, whilst all other addresses remain allowed. | ||
iplloader will not control the location at which it will load/copy the block. It will happily attempt to perform a memcpy (at a rate of 1 DWORD per cycle) to whatever load address is specified in the IPL header, assuming that the header passes the checks (Kirk cmd 1, Kirk cmd 1 ECDSA, Kirk cmd 0x6C SHA1 (on Tachyon 0x00600000 and later), ...). This allows to write a payload at arbitrary locations. | Lib-PSP iplloader will not control the location at which it will load/copy the block. It will happily attempt to perform a memcpy (at a rate of 1 DWORD per cycle) to whatever load address is specified in the IPL header, assuming that the header passes the checks (Kirk cmd 1, Kirk cmd 1 ECDSA, Kirk cmd 0x6C SHA1 (on Tachyon 0x00600000 and later), ...). This allows to write a payload at arbitrary locations. | ||
== Arbitrary IPL Entrypoint Address == | == Arbitrary IPL Entrypoint Address == | ||
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Applicable to: IPL time code execution on 01g and 02g, used in Pandora | Applicable to: IPL time code execution on 01g and 02g, used in Pandora | ||
Fixed: iplloader 2.6.0 | Fixed: Lib-PSP iplloader 2.6.0 | ||
iplloader will jump to any location specified in the last IPL block's entrypoint. This allows arbitrary execution. This was used in conjunction with the Kirk time-attack to craft a block and gain execution from at address 0xBFD00100 in the Pandora hack, and thus allowed to craft a "valid" block in a more timely fashion. | Lib-PSP iplloader will jump to any location specified in the last IPL block's entrypoint. This allows arbitrary execution. This was used in conjunction with the Kirk time-attack to craft a block and gain execution from at address 0xBFD00100 in the Pandora hack, and thus allowed to craft a "valid" block in a more timely fashion. | ||
Note: The vulnerability is also present on Tachyon 0x00600000 and later, but cannot be exploited by itself due to an ECDSA signature (Kirk cmd 17) check. | Note: The vulnerability is also present on Tachyon 0x00600000 and later, but cannot be exploited by itself due to an ECDSA signature (Kirk cmd 17) check. | ||
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Fixed: Tachyon 0x00600000. Bootrom now requires a minimum IPL block size of 0x100. | Fixed: Tachyon 0x00600000. Bootrom now requires a minimum IPL block size of 0x100. | ||
iplloader will not control the block size. This allows to craft a small, favorable for time-attack, IPL block. | Lib-PSP iplloader will not control the block size. This allows to craft a small, favorable for time-attack, IPL block. | ||
https://web.archive.org/web/20100409005536/http://my.malloc.us/silverspring/pandora-exploit/ | https://web.archive.org/web/20100409005536/http://my.malloc.us/silverspring/pandora-exploit/ | ||
== iplloader assumes a block with the checksum 0 is the first IPL block == | == Lib-PSP iplloader assumes a block with the checksum 0 is the first IPL block == | ||
Found by: C+D/Prometheus - Earliest discovery: 2006 Q4 | Found by: C+D/Prometheus - Earliest discovery: 2006 Q4 | ||
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Fixed: indirectly since Tachyon 0x00600000 as no IPL that run on Tachyon 0x00600000 and onwards have a block that uses a previous block checksum of 0 other than block #0 itself. | Fixed: indirectly since Tachyon 0x00600000 as no IPL that run on Tachyon 0x00600000 and onwards have a block that uses a previous block checksum of 0 other than block #0 itself. | ||
This implementation fault has been exploited to create a memory hole in VRAM that could be filled with our own payload to gain execution and dump iplloader. | This implementation fault has been exploited to create a memory hole in VRAM that could be filled with our own payload to gain execution and dump Lib-PSP iplloader. | ||
== iplloader do not perform the XOR step when running in Jig/Service mode == | == Lib-PSP iplloader do not perform the XOR step when running in Jig/Service mode == | ||
Found by: Mathieulh - Earliest discovery: 2019 Q1 | Found by: Mathieulh - Earliest discovery: 2019 Q1 | ||
Introduced: iplloader 3.5.0 | Introduced: Lib-PSP iplloader 3.5.0 | ||
Applicable to: Code execution on 3.5.0 iplloader without previous knowledge of the XOR key. | Applicable to: Code execution on 3.5.0 Lib-PSP iplloader without previous knowledge of the XOR key. | ||
Fixed: probably never as 3.5.0 is the last known iplloader revision for Development Tool | Fixed: probably never as 3.5.0 is the last known Lib-PSP iplloader revision for Development Tool | ||
This is not so much a vulnerability as a poor design implementation. | This is not so much a vulnerability as a poor design implementation. | ||
To allow service centers to use a unique Memory Stick for multiple PSP models during servicing, iplloader deliberately disables the XOR step, allowing a non XORed IPL to run from Memory Stick. This is done so that the IPL can run on all systems from 01g to 11g. This is also presumably done because XOR keys may differ in between Tachyon revisions. | To allow service centers to use a unique Memory Stick for multiple PSP models during servicing, Lib-PSP iplloader deliberately disables the XOR step, allowing a non XORed IPL to run from Memory Stick. This is done so that the IPL can run on all systems from 01g to 11g. This is also presumably done because XOR keys may differ in between Tachyon revisions. | ||
This allows a potential attacker with the ability to enable Jig mode on a targeted PSP to bypass the XOR step and thus not requiring to know the XOR key to gain execution at IPL time assuming that all other checks (Kirk cmd 1, Kirk cmd 1 ECDSA, Kirk cmd 0x6C SHA1 (on Tachyon 0x00600000 and later), ...) are passed. | This allows a potential attacker with the ability to enable Jig mode on a targeted PSP to bypass the XOR step and thus not requiring to know the XOR key to gain execution at IPL time assuming that all other checks (Kirk cmd 1, Kirk cmd 1 ECDSA, Kirk cmd 0x6C SHA1 (on Tachyon 0x00600000 and later), ...) are passed. | ||
== iplloader clears the XOR key after doing a cache sync during normal execution == | == Lib-PSP iplloader clears the XOR key after doing a cache sync during normal execution == | ||
Found by: Proxima - Earliest discovery: 2020-01-27 | Found by: Proxima - Earliest discovery: 2020-01-27 | ||
Introduced: iplloader 3.5.0 | Introduced: Lib-PSP iplloader 3.5.0 | ||
Applicable to: Dumping the iplloader 3.5.0 XOR key from Jig mode execution when used in conjunction with the arbitrary load address vulnerability | Applicable to: Dumping the Lib-PSP iplloader 3.5.0 XOR key from Jig mode execution when used in conjunction with the arbitrary load address vulnerability | ||
Fixed: probably never as 3.5.0 is the last known iplloader revision for Development Tool | Fixed: probably never as 3.5.0 is the last known Lib-PSP iplloader revision for Development Tool | ||
3.5.0 iplloader clears the XOR key after doing a cache sync during normal execution. This allows to retrieve the key from the uncached memory at address 0xA001088C. | 3.5.0 Lib-PSP iplloader clears the XOR key after doing a cache sync during normal execution. This allows to retrieve the key from the uncached memory at address 0xA001088C. | ||
In Jig mode execution, the key is cleared much earlier, however resulting in the cache being synced once the key is already gone. This allows to easily retrieve the key using a XORed IPL block loaded at address 0xBFE01000. | In Jig mode execution, the key is cleared much earlier, however resulting in the cache being synced once the key is already gone. This allows to easily retrieve the key using a XORed IPL block loaded at address 0xBFE01000. | ||
While it may be possible that Tachyon 0x00600000 and later iplloader fix this issue, it is irrelevant because the code should remain accessible as part of the Tachyon bootrom at address 0xBFC00000) | While it may be possible that Tachyon 0x00600000 and later Lib-PSP iplloader fix this issue, it is irrelevant because the code should remain accessible as part of the Tachyon bootrom at address 0xBFC00000) | ||
== Faulty ECDSA Hash Comparison == | == Faulty ECDSA Hash Comparison == | ||
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Fixed: never | Fixed: never | ||
Starting with Tachyon 0x00600000, iplloader XORs each IPL block hash as they are loaded, and then uses this final XOR to verify the signature. | Starting with Tachyon 0x00600000, Lib-PSP iplloader XORs each IPL block hash as they are loaded, and then uses this final XOR to verify the signature. | ||
This means that inserting two identical blocks in the chain will cancel the XOR change and the signature will remain valid. | This means that inserting two identical blocks in the chain will cancel the XOR change and the signature will remain valid. |