基于真实面试题目，适用于应聘 Apple 安全岗位（如 Product Security Engineer、Security Researcher、Vulnerability Analyst 等）。
题目一
Unauthorized Access to Control Center to Disable Wi-Fi from Lock Screen
Scenario:
A researcher has emailed Product Security the below report. You need to draft a reply to the individual explaining why this is not a valid security issue.
TITLE: Unauthorized Access to Control Center to Disable Wi-Fi from Lock ScreenDear Apple Security Team,
I am writing to report a security concern where an attacker can access the Control Center from the lock screen of an iPhone to disable Wi-Fi. This behavior can potentially be exploited to interfere with device tracking features, such as Find My iPhone, and poses a risk to device recovery in case of theft.
Issue Description:
By swiping down or up (depending on the iPhone model) to access the Control Center from the lock screen, it is possible to toggle Wi-Fi off without unlocking the device. This behavior can disrupt device connectivity, including disabling tracking services that rely on a network connection.Affected Devices:
This issue has been observed on iPhones running iOS 18.1.This vulnerability poses a risk to device security and tracking. I recommend addressing this behavior promptly to enhance user protection. Please let me know if additional details or testing assistance is required.
Steps to Reproduce:
- Ensure that the Control Center is enabled on the lock screen in the device settings.
- Lock the iPhone and access the lock screen.
- Swipe to open the Control Center.
- Toggle the Wi-Fi icon to disable Wi-Fi connectivity.
Impact:
- Disruption of Find My iPhone: Disabling Wi-Fi can make it more difficult to locate a lost or stolen device, especially if cellular data is unavailable or turned off.
- Increased Risk of Theft: This behavior may encourage theft by reducing the likelihood of recovery.
Proposed Solutions:
- Require device authentication before allowing network settings, such as Wi-Fi and cellular, to be toggled from the Control Center.
- Provide users with the ability to disable network-related controls from the lock screen entirely.
- Consider an option to make Find My iPhone more resilient by requiring a password or biometrics before allowing Wi-Fi to be disabled.
分析：
这道题目不是考你发现漏洞，而是考你是否能解释“这不是个漏洞”。苹果允许用户在锁屏时访问控制中心，是为了便利性。这项功能可以在设置中关闭，所以用户是有控制权的，不存在强制性风险。
这种题型关键在于：
- 表达清楚行为是预期的
- 说明用户有选择权
- 语气尊重研究者，但坚定指出这不是安全问题
📝 英文范文回复：
Dear [Researcher's Name],
Thank you for your report.
The behavior you described—being able to access Control Center from the lock screen and toggle Wi-Fi—is expected and user-configurable.
Users can disable Control Center access from the lock screen via Settings > Face ID & Passcode > Control Center.
While we understand your concern about potential disruption to tracking services, this design choice is intentional and balances usability with security.
Therefore, this is not considered a security vulnerability.
We appreciate your attention to device security and encourage you to share any future findings.
Best regards,
Apple Security Team
题目二
Race Condition Leading to EUID Privilege Escalation
Exploit:
This PoC exploits exactly this race condition to get a thread port for an euid 0 process. Since we've exec'd it I just stick a ret-slide followed by a small ROP payload on the actual stack at exec time then use the thread port to set RIP to a gadget which does a large add rsp, X and pop's a shell 🙂Just run it for a while, it's quite a tight race window but it will work! (try a few in parallel)
Note that the fundamental issue here isn't this particular race condition but the fact that a task struct pointer can just never ever be relied on to have the same euid as when you first got hold of it.
分析：
这是一道真实技术漏洞题，考察你是否理解 PoC 逻辑：通过竞争条件（race condition）争抢 euid 0 的线程端口，最终利用 ROP 技术提权。
你需要判断的是：
- 这个 PoC 是不是现实可用？（race 成功率、线程 hijack 难度）
- 是不是已知漏洞？是否 Apple 内部已经修复？
- 如果是有效漏洞，应高度重视；如果不可行，也要礼貌反馈
📝 英文范文回复（若确认有效）：
Thank you for your detailed submission.
We have reviewed the PoC and confirmed that it demonstrates a valid race condition that may lead to unauthorized access to a privileged thread port and possible local privilege escalation.
We’re investigating this issue further and will implement appropriate mitigations as necessary.
We appreciate your responsible disclosure and will follow up as we proceed.
Best regards,
Apple Security Team
📝 英文范文回复（若不可复现/利用难度极高）：
Thank you for your submission.
We have evaluated your PoC and found that exploitation relies on highly specific timing and environmental conditions, which significantly limit its practical impact.
At this time, we have not observed reliable exploitation results. However, we will continue monitoring this vulnerability class.
We appreciate your research and encourage further reports.
Best regards,
Apple Security Team题目三
Disabling Device Tracking by Toggling Network Settings Without Authentication
✅ 原题原文（节选自截图）：
Impact:
This issue can have significant implications, including:
* Disruption of Find My iPhone: Disabling Wi-Fi can make it more difficult to locate a lost or stolen device, especially if cellular data is unavailable or turned off.
* Increased Risk of Theft: This behavior may encourage theft by reducing the likelihood of recovery.Proposed Solutions:
- Require device authentication before allowing network settings, such as Wi-Fi and cellular, to be toggled from the Control Center.
- Provide users with the ability to disable network-related controls from the lock screen entirely.
- Consider an option to make Find My iPhone more resilient by requiring a password or biometrics before allowing Wi-Fi to be disabled.
🔍 中文分析：
这道题实际上是上一题的延伸——但考察点从“这是不是漏洞”变成了“这些建议是否合理”。
你要处理的是研究者提出的三条改进建议。面对这类建议，你需要从用户体验角度进行权衡回应，而不是简单采纳或否定：
- Apple 倾向于让用户自己配置锁屏功能，而不是默认限制。
- 在设计上，苹果的理念是“用户控制优先”，并非所有功能都需要强制认证。
- 所以你的回复应当表示“感谢建议、目前已有设置可控、我们会转达给产品团队”。
📝 英文范文回复：
Thank you for your thoughtful suggestions.
Apple continuously evaluates opportunities to strengthen device security while maintaining usability.
Currently, users have the ability to disable Control Center access from the lock screen under Settings > Face ID & Passcode.
While we do not require authentication for network toggles by default, we acknowledge the potential use case and will share your suggestions with the relevant teams for further review.
We appreciate your efforts in helping us improve user protection.
Best regards,
Apple Security Team
题目四
Abusing IOKit Task Struct to Bypass EUID Checks
There are a large number of IOKit drivers which do this (storing task struct pointers) and then either use the[m] to manipulate userspace VM (e.g., IOAcceleratorFamily2, IOThunderboltFamily, IOSurface) or rely on that task struct pointer to perform authorization checks like the code in IOHIDFamily.
Note that the fundamental issue here isn't this particular race condition but the fact that a task struct pointer can just never ever be relied on to have the same euid as when you first got hold of it.
解析：
这是一个更深层的系统架构问题，提出了一种设计层面的漏洞隐患：
- 某些 IOKit 驱动长期持有 task struct 指针，而该指针指向的 euid 是可变的；
- 如果这个指针用于权限检查，就可能因为时序不一致，导致权限绕过。
这类题不一定要求你判断“是不是立即 exploitable”，而是看你是否意识到系统设计缺陷级别的问题，并能给出 Apple 式回应：我们认同存在风险，会进一步分析，但目前不构成直接漏洞。
📝 英文范文回复：
Thank you for bringing this to our attention.
We agree that relying on long-lived task struct pointers for authorization checks may introduce unexpected behavior, particularly in multi-threaded or race-prone contexts.
While this issue may not result in a directly exploitable condition in the current usage patterns, we recognize the architectural concern and will investigate the impact across relevant IOKit drivers.
We appreciate your insight into this design-level risk.
Best regards,
Apple Security Team
面试重点提示（收尾建议）
- 不是所有“功能滥用”都是漏洞，学会判断“设计 vs 缺陷”。
- 回答要客气，不卑不亢，用词要专业、克制、客观。
- 从用户角度出发，而不是黑客角度，体现你能平衡安全与体验。
- 默认 Apple 的设计是有目的的，除非你能清楚证明系统级危害。
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