60 lines
2.7 KiB
Swift
60 lines
2.7 KiB
Swift
// iio.ktx2 · ImageIO · KTX2ReadPlugin · CVE-2026-112625
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// 原语: 整数溢出 · 进程内 · tier 2
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// Primitive: integer overflow · in-process · tier 2
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//
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// [zh] KTX2 维度/层级尺寸运算
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// KTX/KTX2 的层级字节数与块数运算缺少 64 位 umull/umulh 保护，且既有检查所依据的量本身是错的（使用 channels 而非源 bpp）。27.2 增加 \"image
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// dimensions overflow\" 与 \"expected %llu bytes\" 两道闸门。
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//
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// [en] KTX2 dimension and level size arithmetic
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// KTX/KTX2 level byte counts and block counts lack 64-bit umull/umulh protection, and the existing
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// check is keyed on the wrong quantity (channels rather than source bpp). iOS 27.2 adds "image dimensions
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// overflow" and "expected %llu bytes" gates.
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// ── 判别 / oracle ──
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// 维度 0xFFFF×0xFFFF，层级索引声明 64 字节。
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// 变体 iio.pvr: PVR 位深低于通道位和
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//
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// 种子构建器（python，可直接运行）: CVE-2026-112625/CVE-2026-112625.py
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// runnable python seed builder: CVE-2026-112625/CVE-2026-112625.py
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import Foundation
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// ── byte helpers — verbatim from Cinder27 Sources/Kit.swift ──
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enum B {
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static func be16(_ v: UInt16) -> [UInt8] { [UInt8(v >> 8 & 0xff), UInt8(v & 0xff)] }
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static func le16(_ v: UInt16) -> [UInt8] { [UInt8(v & 0xff), UInt8(v >> 8 & 0xff)] }
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static func be32(_ v: UInt32) -> [UInt8] {
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[UInt8(v >> 24 & 0xff), UInt8(v >> 16 & 0xff), UInt8(v >> 8 & 0xff), UInt8(v & 0xff)]
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}
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static func le32(_ v: UInt32) -> [UInt8] {
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[UInt8(v & 0xff), UInt8(v >> 8 & 0xff), UInt8(v >> 16 & 0xff), UInt8(v >> 24 & 0xff)]
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}
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static func be64(_ v: UInt64) -> [UInt8] {
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(0..<8).map { UInt8((v >> (56 - UInt64($0) * 8)) & 0xff) }
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}
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static func le64(_ v: UInt64) -> [UInt8] {
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(0..<8).map { UInt8((v >> (UInt64($0) * 8)) & 0xff) }
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}
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static func both16(_ v: UInt16) -> [UInt8] { le16(v) + be16(v) }
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static func both32(_ v: UInt32) -> [UInt8] { le32(v) + be32(v) }
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static func ascii(_ s: String) -> [UInt8] { Array(s.utf8) }
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}
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/*
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// iio.pvr · ImageIO · PVRReadPlugin::initialize · CVE-2026-112625
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// 原语: 整数溢出 · 进程内 · tier 3
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// Primitive: integer overflow · in-process · tier 3
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//
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// [zh] PVR 位深低于通道位和
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// 各通道位数之间的相互匹配检查早已存在，但缺少 bitsPerPixel 相对通道位和的下界比较。27.2 补入 \"_bitsPerPixel %d is too small for 4 channels
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// of %d bits\"。
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//
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// [en] PVR bits-per-pixel below the channel bit sum
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// The mutual consistency check between channel bit widths has always been present, but there is no
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// lower bound comparing bitsPerPixel against the sum of channel bits. iOS 27.2 adds "_bitsPerPixel
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// %d is too small for 4 channels of %d bits".
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*/
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