Evasi0n, (stylized as "evasi0n"), is a untethered
jailbreak
A prison escape (referred as a bust out, breakout, jailbreak, or prison break) is the act of an inmate leaving prison through unofficial or illegal ways. Normally, when this occurs, an effort is made on the part of authorities to recapture the ...
program for iOS 6.0 - 6.1.2 and for iOS 7.0 - 7.0.6 (with evasi0n7). It is known for a portable code base and minimal use of
arbitrary code execution
In computer security, arbitrary code execution (ACE) is an attacker's ability to run any commands or code of the attacker's choice on a target machine or in a target process. An arbitrary code execution vulnerability is a security flaw in softw ...
. More than seven million copies of Evasi0n were downloaded and presumably installed in the first four days after release.
It was released on 4 February 2013. Four of the six exploits used were patched by
Apple
An apple is an edible fruit produced by an apple tree (''Malus domestica''). Apple fruit tree, trees are agriculture, cultivated worldwide and are the most widely grown species in the genus ''Malus''. The tree originated in Central Asia, wh ...
on 18 March 2013 with the release of iOS 6.1.3, which meant the end of the original version of evasi0n. On 22 December 2013, the evad3rs released a new version of evasi0n that supports iOS 7.x, known as evasi0n7. One major exploit used by this jailbreak was patched by Apple with the 4th beta of iOS 7.1 and two more with beta 5. The final release of iOS 7.1 fixed all the exploits used by evasi0n7.
The evasi0n jailbreak first remounts the root file system as read-write and then achieves persistence by editing the
/etc/launchd.conf file, which
launchd
launchd is an init and operating system service management daemon created by Apple Inc. as part of macOS to replace its BSD-style init and SystemStarter. There have been efforts to port launchd to FreeBSD and derived systems.
Components
Th ...
consults. Evasi0n then applies patches in the kernel, bypassing
address space layout randomization
Address space layout randomization (ASLR) is a computer security technique involved in preventing exploitation of memory corruption vulnerabilities. In order to prevent an attacker from reliably jumping to, for example, a particular exploited fu ...
by triggering a data fault and reconstructing the kernel slide by reading the faulting instruction from the appropriate ARM
exception vector.
See also
p0sixspwn an userland jailbreak for iOS 6.1.3-6.1.6 developed by iH8sn0w, winocm and SquiffyPwn.
*
Cydia
Cydia is a graphical user interface of APT (Advanced Package Tool) for iOS. It enables a user to find and install software not authorized by Apple on jailbroken iPhones, iPads and iPod Touch devices. It also refers to digital distribution pla ...
, an open-source package manager for iOS which uses
APT
Apt. is an abbreviation for apartment.
Apt may also refer to:
Places
* Apt Cathedral, a former cathedral, and national monument of France, in the town of Apt in Provence
* Apt, Vaucluse, a commune of the Vaucluse département of France
* A ...
repositories to get apps and tweaks.
References
External links
*{{official website, http://evasi0n.com, Evasi0n.com – official site
IOS software
IOS jailbreaks