// cal.unzip · CalendarFoundation · _UnzipArchiveWithLimits · CVE-2026-112619 // 原语: OOB 写 · 系统进程 · tier 3 // Primitive: OOB write · system process · tier 3 // // [zh] 日历附件解压容器逃逸 // 27.2 将 _UnzipArchive(288 B,无任何限制)替换为 _UnzipArchiveWithLimits(2040 B),并新增 _CalUnzipEntryDestinationPath // / _CalUnzipParentIsContained / _CalUnzipTrackTopLevelPath 与 isSymbolicLinkAtURL。ICS 解析器本身未作改动 —— // 修复全部位于附件归档的解压遏制层。 // // [en] Calendar attachment extraction containment // iOS 27.2 replaces _UnzipArchive (288 B, no limits at all) with _UnzipArchiveWithLimits (2040 B) // and adds _CalUnzipEntryDestinationPath / _CalUnzipParentIsContained / _CalUnzipTrackTopLevelPath // plus isSymbolicLinkAtURL. The ICS parser itself is untouched — the whole fix sits in the attachment // archive extraction containment layer. // ── 判别 / oracle ── // 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)。 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) } }