Cinder27 — iOS 17.0-27.1 vulnerability verification lab: 51 modules, 31 per-CVE POC folders, 11 no-CVE module folders, harness app source

CVE-2026-112488/CVE-2026-112488.swift

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+// iio.tiff.direntry · ImageIO · TIFFReadDirEntry*Array · CVE-2026-112488
+// 原语: OOB 写 · 进程内 · tier 2
+// Primitive: OOB write · in-process · tier 2
+//
+// [zh] TIFF 目录项分配 32 位截断
+// 输出分配的大小以 lsl w0, count, #log2(elemsize) 计算，属 32 位截断。当 count = 0x20000000 且元素宽度为 8 字节时，分配结果回绕为 0，
+// 而逐元素转换循环仍执行 count 次写入。27.2 改用 _TIFFCheckMalloc_type 的 64 位检查尺寸。
+//
+// [en] TIFF directory entry allocation 32-bit truncation
+// The output allocation size is computed as lsl w0, count, #log2(elemsize) — a 32-bit truncation.
+// With count = 0x20000000 and 8-byte elements the allocation wraps to zero while the per-element
+// conversion loop still performs count writes. iOS 27.2 switches to _TIFFCheckMalloc_type's 64-bit
+// checked size.
+// ── 判别 / oracle ──
+// 该原语的成立条件是 count×elemsize 跨越 2^32。本模块以一个 0x20000000 的 SBYTE 数组触发分配器，观察其返回空指针（干净拒绝）还是返回远小于请求的块（截断成立）。
+
+import Foundation
+
+// ── byte helpers — verbatim from Cinder27 Sources/Kit.swift ──
+enum B {
+    static func be16(_ v: UInt16) -> [UInt8] { [UInt8(v >> 8 & 0xff), UInt8(v & 0xff)] }
+    static func le16(_ v: UInt16) -> [UInt8] { [UInt8(v & 0xff), UInt8(v >> 8 & 0xff)] }
+    static func be32(_ v: UInt32) -> [UInt8] {
+        [UInt8(v >> 24 & 0xff), UInt8(v >> 16 & 0xff), UInt8(v >> 8 & 0xff), UInt8(v & 0xff)]
+    }
+    static func le32(_ v: UInt32) -> [UInt8] {
+        [UInt8(v & 0xff), UInt8(v >> 8 & 0xff), UInt8(v >> 16 & 0xff), UInt8(v >> 24 & 0xff)]
+    }
+    static func be64(_ v: UInt64) -> [UInt8] {
+        (0..<8).map { UInt8((v >> (56 - UInt64($0) * 8)) & 0xff) }
+    }
+    static func le64(_ v: UInt64) -> [UInt8] {
+        (0..<8).map { UInt8((v >> (UInt64($0) * 8)) & 0xff) }
+    }
+    static func both16(_ v: UInt16) -> [UInt8] { le16(v) + be16(v) }
+    static func both32(_ v: UInt32) -> [UInt8] { le32(v) + be32(v) }
+    static func ascii(_ s: String) -> [UInt8] { Array(s.utf8) }
+}
+
+
+