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iMessage - Decoding NSSharedKeyDictionary can read ObjC Object at Attacker Controlled Address
During processing of incoming iMessages, attacker controlled data is deserialized using the
NSUnarchiver API. One of the classes that is allowed to be decoded from the incoming data is
NSDictionary...
Adobe Acrobat Reader DC for Windows - Use of Uninitialized Pointer due to Malformed JBIG2Globals Stream
We have observed the following access violation exception in the latest version of Adobe Acrobat Reader DC for Windows, when opening a malformed PDF file:
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(88e4.30f4): Access...
Adobe Acrobat Reader DC for Windows - Use of Uninitialized Pointer due to Malformed OTF Font (CFF Table)
We have observed the following access violation exception in the latest version of Adobe Acrobat Reader DC for Windows, when opening a malformed PDF file:
--- cut ---
(5708.4564): Access...
macOS XNU - Missing Locking in checkdirs_callback() Enables Race with fchdir_common()
On macOS, when a new mount point is created, the kernel uses checkdirs() to, as
a comment above the function explains: "Scan all active processes to see if any
of them have a current or root directory onto...
JavaScriptCore - Type Confusion During Bailout when Reconstructing Arguments Objects
The following sample was found by Fuzzilli and then slightly modified. It crashes JSC in debug builds:
function main() {
const v2 = [1337,1337];
const v3 = [1337,v2,v2,0];
Object.__proto__ =...
JavaScriptCore - GetterSetter Type Confusion During DFG Compilation
The following JavaScript program, found by Fuzzilli and slightly modified, crashes JavaScriptCore built from HEAD and the current stable release (/System/Library/Frameworks/JavaScriptCore.framework/Resources/jsc):
let...
Microsoft Edge - 'UnmapViewOfFile' ACG Bypass
Background:
To implement ACG (https://blogs.windows.com/msedgedev/2017/02/23/mitigating-arbitrary-native-code-execution/#VM4y5oTSGCRde3sk.97), Edge uses a separate process for JIT compiling. This JIT Process is also responsible for mapping native...
Pdfium - Pattern Shading Integer Overflows
This vulnerability relies on several minor oversights in the handling of shading patterns in pdfium, I'll try to detail all of the issues that could be fixed to harden the code against similar issues.
The DrawXShading functions in...
Pdfium - Out-of-Bounds Read with Shading Pattern Backed by Pattern Colorspace
Related to issue 1490 .
When parsing ShadingPatterns; according to the specification they shouldn't be permitted to have a pattern colorspace as their base colorspace, but this is not validated, leading to...
Microsoft Edge Chakra JIT - 'NewScObjectNoCtor' Array Type Confusion
/*
This is similar to the previous issues 1457, 1459 (MSRC 42551, MSRC 42552).
If a JavaScript function is used as a consturctor, it sets the new object's "__proto__" to its "prototype". The JIT compiler uses...