43 lines
2.1 KiB
Swift
43 lines
2.1 KiB
Swift
// cal.unzip · CalendarFoundation · _UnzipArchiveWithLimits · CVE-2026-112619
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// 原语: OOB 写 · 系统进程 · tier 3
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// Primitive: OOB write · system process · tier 3
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//
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// [zh] 日历附件解压容器逃逸
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// 27.2 将 _UnzipArchive（288 B，无任何限制）替换为 _UnzipArchiveWithLimits（2040 B），并新增 _CalUnzipEntryDestinationPath
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// / _CalUnzipParentIsContained / _CalUnzipTrackTopLevelPath 与 isSymbolicLinkAtURL。ICS 解析器本身未作改动 ——
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// 修复全部位于附件归档的解压遏制层。
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//
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// [en] Calendar attachment extraction containment
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// iOS 27.2 replaces _UnzipArchive (288 B, no limits at all) with _UnzipArchiveWithLimits (2040 B)
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// and adds _CalUnzipEntryDestinationPath / _CalUnzipParentIsContained / _CalUnzipTrackTopLevelPath
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// plus isSymbolicLinkAtURL. The ICS parser itself is untouched — the whole fix sits in the attachment
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// archive extraction containment layer.
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// ── 判别 / oracle ──
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// 应用侧可以验证 CalendarFoundation 的类与方法是否可见，以及本进程里 libarchive 的路径穿越是否被拦住（用 ../ 名字的归档试）。
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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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