[Ios 8.4 Jailbreak
Jamar Lizarraga
No you cannot update at the moment unless you already have saved shsh blobs for the target release as Apple is now only signing the 5.2.1 release and there is no current jailbreak for that release. You will have to wait until (if) SeasonPass (or another jailbreaking tool) is updated to be able to jailbreak a release that Apple is still signing.
Since this topic has not been discussed here in recent years I would like to know if Jailbreak detection is reliable or not now. I am using a smart group to check for the is jailbreak trigger and I have had two detections during my rollout of JAMFpro. One device continues to trigger even days after I have performed a full wipe and restore while connected to a mac.
Does anyone else have trouble with this detection method not working or is this a rock-solid result when it triggers? I am at a school and we would need to know if this is reliable before going after students for the result.
I had enabled Jailbreak detection at my last job. In five years I never had a student Jailbreak and iPad however, they found many other ways to hack their devices. VPNs, Config. Profiles, policies installed from sketchy sites, Apps installed from asian web sites, etc. I set up smart groups to look for violations. There are so many ways to "hack" the management that are much easier than a full on Jailbreak.
I concur that there are multiple ways to get around things. When my JAMF server was set up the tech had me set up the jailbreak detection. I was just wondering if it was accurate. If it is then I have a student who has performed it twice.
I read a few weeks ago that there was some issues with the built in detection function in Jamf Pro. I believe using the smart group criteria: any device containing the app name "Cydia" worked as a work-around to this problem. Here are a few restrictions I push to all enrolled iOS devices that cut down on users, specifically students, from getting around things:
Disallow Proximity Password Request
Safari Fraud Warning
Limited ad tracking
Don't Allow VPN Creation Disallow trusting enterprise apps
Disallow diagnostic submission
Enforce Automatic Date & Time
Disallow Pop-ups in Safari
Disallow Installing Configuration Profiles (this won't impact Jamf Pro's ability to install configuration profiles)
@DrStr4ng3 The best defense against jailbreaking and sketchy web-born configuration profiles is keeping Apple software updated. And @jared_f 's technique would help too! Self Service needs to be installed for the jailbreak detection to work by the way.
Is "Disallow Installing Configuration Profiles" not reliable? I did that to prevent students from installing iOS betas and never heard about anyone doing that again. There was never a hardline prohibition telling students not to do that, but it caused unnecessary complications and there was no sound reason to do it on an iPad dedicated to academic work.
The issue I am running in to (and this is in support at the moment, they are elevating to higher to see whats up) is that the jailbreak detection checks the device reporting if it is in jailbreak or not. If the device reports yes, or doesn't report its status this triggers the jailbreak detection.
@prl My self service is installed so not an issue there. One thing to note is that devices do not get added to the jailbreak smart group until they attempt to install something in self service. Then it triggers the jailbreak or they just don't report their status.
I know this thread is old by now so this is a follow up for others who might have an issue. The JAMF jaibreak detection gets triggered when a device enrolls and opens the self service app. Everytime Self-service is opened jailbreak triggers. Once the requested app is installed and self service is closed jailbreak notification goes away.
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Use a simpler model (e.g. GPT 3.5) to do a zero/few-shot classification of the input prompt to check its relevance. You can also set the max_token and logit_bias so that the model only returns a 0 and 1, and reduce the output token cost. With the latest release of log_probs, you can also do this classification based on a threshold.
That said, I have found it more productive to set the expectations with clients that public GPTs are public and that any instructions, knowledge, and actions you add in will be able to be read completely. This helps to reframe the conversation and rethink what the GPT can do.
The result I get is quite promising, my solution was able to resist all of DAN jailbreak prompt. This approach also prevent toxic prompt from polluting my main model. Therefore, I think the higher cost is reasonable.
Since the term first appeared, jailbreaking has also been used to refer to adapting the code on other devices, from phones to games consoles. People sometimes use it to refer to installing custom software on mobiles or removing Digital Rights Management (DRM) restrictions on movies. However, the term usually refers to Apple products. Aside from the iPhone, jailbreaking can also refer to the iPad and iPod Touch.
Jailbreaking does not change the device's core features, and a jailbroken iPhone or iPad can still purchase and download apps from Apple's App Store. However, to download apps that Apple rejected or leverage the additional features jailbreaking provides, jailbroken devices rely on independent app stores. The most popular of these is Cydia, a storefront for jailbroken iOS devices, which is usually installed during the jailbreaking process.
Jailbreak code is usually provided for free through forums and sites by hacking communities who want to promote unrestricted device use. Most jailbreaks come with full instructions and desktop tools to apply the new code, but some technical knowledge is usually helpful.
Strictly speaking, jailbreaking is not illegal, but laws vary worldwide, continue to evolve, and are often a grey area when it comes to this topic. While it is legal to jailbreak or root a phone (if you are doing it to install legally acquired apps) that is not the case if you are doing it to install illegally acquired apps.
In the US, jailbreaking falls under the Digital Millennium Copyright Act, which covers digital copyright issues. Section 1201 of the law makes it illegal to circumvent digital locks that protect access to copyrighted works, which can include software. Congress reviews the law every few years and has gradually expanded the list of exempt items. Jailbreaking phones became legal in 2010, followed by smartwatches and tablets in 2015. Since then, more devices have been added to the exemption list, and it continues to evolve as it is reviewed.
While Apple does not support jailbreaking, the company has generally not legally threatened jailbreakers. In fact, Apple has even been known to thank jailbreak communities for detecting security holes.
Regardless of the law, jailbreaking your phone voids the warranty, so if something goes wrong with your device, you have nothing to fall back on. It also leaves you exposed to a range of security issues, which we discuss below.
This is why Apple warns against jailbreaking your iPhone or any other iOS device. While it is rare for iPhones to get viruses when they do, it is often because the phone has been jailbroken. If something goes wrong with the phone, it is up to you to fix it, because the act of jailbreaking voids your warranty.
Organizations that provide mobile devices to employees typically have security measures in place to prevent users from putting company data at risk. This may include further locking down phones so only certain features can be added or changed, keeping devices and apps up to date, and installing a mobile device agent that can detect a jailbroken phone.
Apple aims to provide users with a unified look and feel. For users who find that restrictive and want to customize their phone by adding their own icons, wallpapers, and menus, jailbreaking is the way to do that. You become the administrator of your device with all the relevant rights, rather than Apple or anyone else. For example, you can add extra icons to your iPhone home screen or install your own screensavers. Jailbreaking also gives greater access to the file system and even unlocks communication from another device, which means you can connect your iPad to your PC and have greater control over what you can see and do.
Apple bans various apps from its App Store due to security reasons. Jailbreaking enables you to install apps that are not available from the App Store. Cydia is the most popular storefront for jailbroken phones, allowing you to add unauthorized apps, such as games and networking tools. Retro gaming emulators are also good examples: Apple bans these from its own app store (because they allow you to play older computer games without buying the original copies). However, they are freely available on Cydia.
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