[KERNEL][STOCK][4.4.2] Only Adb Insecure

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_AtilA_

Member
Jul 29, 2011
25
52
[KERNEL][STOCK][4.4.2] Only Adb Insecure

Hi there!
I needed adbd to always run as root in order to push/pull files, but I wanted to stick as close as possible to stock, so I just modified the production boot.img with a patched version of adbd that enforces it to always run as root. I used a boot.img for Android 4.4.2 extracted from the factory images [1] provided by Google.
I thought that it could be usefull to somebody else so... here you have.

It comes in two flavors:

CWM installable .zip [2]
boot.img for fastboot[/URL] [3]


LINKS
[1] Google Factory Images : https://developers.google.com/android/nexus/images?hl=es#hammerhead
[2] CWM Installable .zip : https://mega.co.nz/#!lJVxWCaA!QA4Zo04_bnzxEjmHDyjUDl9cFiAjJ5QCuIzuYFN bnFU
[3] boot.img : https://mega.co.nz/#!sYE0xDZL!PpR1GzIraGCMxr9BOqrZ0wFbBnJO6HSdsee4mGF d5PA


Enjoy!!

XDA:DevDB Information
[KERNEL][STOCK][4.4.2] Only Adb Insecure, a Kernel for the Google Nexus 5

Contributors
_AtilA_
Kernel Special Features: Stock kernel, but with adbd running always as root, so you can adb push/pull/remount/shell/etc as root

Version Information
Status: Stable

Created 2014-01-16
Last Updated 2014-01-16
 
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Reactions: freaksamael, osebee, Varun.Shanbhag and 7 others
A

_AtilA_

Member
Jul 29, 2011
25
52
BRiANj64 said:
Err would be nice if we could auto patch a boot.img from other custom kernels ^^
Click to expand...
Click to collapse

Not really sure about what you mean... Basically, the only change I made is a patched adbd. So, the only thing that other custom kernels have to do, is replace the binary. I can provide you a link with the binary, but it's quite easy to extract it from the boot.img :)
I you want to know exactly what I've changed in the adb.c, here it is:
Code: 
static int should_drop_privileges() {
#ifndef ALLOW_ADBD_ROOT
    return 1;
#else /* ALLOW_ADBD_ROOT */
    int secure = 0;
    char value[PROPERTY_VALUE_MAX];

   /* run adbd in secure mode if ro.secure is set and
    ** we are not in the emulator
    */
#if 0 /* <JGM> No privileges drop! */
    property_get("ro.kernel.qemu", value, "");
    if (strcmp(value, "1") != 0) {
        property_get("ro.secure", value, "1");
        if (strcmp(value, "1") == 0) {
            // don't run as root if ro.secure is set...
            secure = 1;

            // ... except we allow running as root in userdebug builds if the
            // service.adb.root property has been set by the "adb root" command
            property_get("ro.debuggable", value, "");
            if (strcmp(value, "1") == 0) {
                property_get("service.adb.root", value, "");
                if (strcmp(value, "1") == 0) {
                    secure = 0;
                }
            }
        }
    }
#endif
    return secure;
#endif /* ALLOW_ADBD_ROOT */
}

Simple, disable privilege drop logic and return the correct value.
 
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Reactions: Duago
jumparound246

jumparound246

Senior Member
Oct 22, 2012
774
329
_AtilA_ said:
I don't really know! I've never used TWRP, maybe someone could tell us if CWM .zip file is compatible with the TWRP installation system :)
Click to expand...
Click to collapse

Yup

Sent from my Nexus 5 using Tapatalk

---------- Post added at 11:16 PM ---------- Previous post was at 11:14 PM ----------
yvu3ygu4.jpg


Can't imagine why all the guys are using custom kernels...:what:

Sent from my Nexus 5 using Tapatalk
 
C

cliff p

Senior Member
Oct 4, 2011
250
173
Seoul
_AtilA_ said:
Hi there!
I needed adbd to always run as root in order to push/pull files, but I wanted to stick as close as possible to stock, so I just modified the production boot.img with a patched version of adbd that enforces it to always run as root. I used a boot.img for Android 4.4.2 extracted from the factory images [1] provided by Google.
I thought that it could be usefull to somebody else so... here you have.

It comes in two flavors:

CWM installable .zip [2]
boot.img for fastboot[/URL] [3]


LINKS
[1] Google Factory Images : https://developers.google.com/android/nexus/images?hl=es#hammerhead
[2] CWM Installable .zip : https://mega.co.nz/#!lJVxWCaA!QA4Zo04_bnzxEjmHDyjUDl9cFiAjJ5QCuIzuYFN bnFU
[3] boot.img : https://mega.co.nz/#!sYE0xDZL!PpR1GzIraGCMxr9BOqrZ0wFbBnJO6HSdsee4mGF d5PA


Enjoy!!

XDA:DevDB Information
[KERNEL][STOCK][4.4.2] Only Adb Insecure, a Kernel for the Google Nexus 5

Contributors
_AtilA_
Kernel Special Features: Stock kernel, but with adbd running always as root, so you can adb push/pull/remount/shell/etc as root

Version Information
Status: Stable

Created 2014-01-16
Last Updated 2014-01-16
Click to expand...
Click to collapse

FWIW: The MEGA link does not work natively with the MEGA App if you attempt to download directly from your N5. The link is
Code: 
https://mega.co.nz/#!lJVxWCaA!QA4Zo04_bnzxEjmHDyjUDl9cFiAjJ5QCuIzuYFNbnFU
 
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    A
    _AtilA_
    [KERNEL][STOCK][4.4.2] Only Adb Insecure

    Hi there!
    I needed adbd to always run as root in order to push/pull files, but I wanted to stick as close as possible to stock, so I just modified the production boot.img with a patched version of adbd that enforces it to always run as root. I used a boot.img for Android 4.4.2 extracted from the factory images [1] provided by Google.
    I thought that it could be usefull to somebody else so... here you have.

    It comes in two flavors:

    CWM installable .zip [2]
    boot.img for fastboot[/URL] [3]


    LINKS
    [1] Google Factory Images : https://developers.google.com/android/nexus/images?hl=es#hammerhead
    [2] CWM Installable .zip : https://mega.co.nz/#!lJVxWCaA!QA4Zo04_bnzxEjmHDyjUDl9cFiAjJ5QCuIzuYFN bnFU
    [3] boot.img : https://mega.co.nz/#!sYE0xDZL!PpR1GzIraGCMxr9BOqrZ0wFbBnJO6HSdsee4mGF d5PA


    Enjoy!!

    XDA:DevDB Information
    [KERNEL][STOCK][4.4.2] Only Adb Insecure, a Kernel for the Google Nexus 5

    Contributors
    _AtilA_
    Kernel Special Features: Stock kernel, but with adbd running always as root, so you can adb push/pull/remount/shell/etc as root

    Version Information
    Status: Stable

    Created 2014-01-16
    Last Updated 2014-01-16
    View
    1
    A
    _AtilA_
    BRiANj64 said:
    Err would be nice if we could auto patch a boot.img from other custom kernels ^^
    Click to expand...
    Click to collapse

    Not really sure about what you mean... Basically, the only change I made is a patched adbd. So, the only thing that other custom kernels have to do, is replace the binary. I can provide you a link with the binary, but it's quite easy to extract it from the boot.img :)
    I you want to know exactly what I've changed in the adb.c, here it is:
    Code: 
    static int should_drop_privileges() {
#ifndef ALLOW_ADBD_ROOT
    return 1;
#else /* ALLOW_ADBD_ROOT */
    int secure = 0;
    char value[PROPERTY_VALUE_MAX];

   /* run adbd in secure mode if ro.secure is set and
    ** we are not in the emulator
    */
#if 0 /* <JGM> No privileges drop! */
    property_get("ro.kernel.qemu", value, "");
    if (strcmp(value, "1") != 0) {
        property_get("ro.secure", value, "1");
        if (strcmp(value, "1") == 0) {
            // don't run as root if ro.secure is set...
            secure = 1;

            // ... except we allow running as root in userdebug builds if the
            // service.adb.root property has been set by the "adb root" command
            property_get("ro.debuggable", value, "");
            if (strcmp(value, "1") == 0) {
                property_get("service.adb.root", value, "");
                if (strcmp(value, "1") == 0) {
                    secure = 0;
                }
            }
        }
    }
#endif
    return secure;
#endif /* ALLOW_ADBD_ROOT */
}

    Simple, disable privilege drop logic and return the correct value.
    View
    1
    C
    cliff p
    _AtilA_ said:
    Hi there!
    I needed adbd to always run as root in order to push/pull files, but I wanted to stick as close as possible to stock, so I just modified the production boot.img with a patched version of adbd that enforces it to always run as root. I used a boot.img for Android 4.4.2 extracted from the factory images [1] provided by Google.
    I thought that it could be usefull to somebody else so... here you have.

    It comes in two flavors:

    CWM installable .zip [2]
    boot.img for fastboot[/URL] [3]


    LINKS
    [1] Google Factory Images : https://developers.google.com/android/nexus/images?hl=es#hammerhead
    [2] CWM Installable .zip : https://mega.co.nz/#!lJVxWCaA!QA4Zo04_bnzxEjmHDyjUDl9cFiAjJ5QCuIzuYFN bnFU
    [3] boot.img : https://mega.co.nz/#!sYE0xDZL!PpR1GzIraGCMxr9BOqrZ0wFbBnJO6HSdsee4mGF d5PA


    Enjoy!!

    XDA:DevDB Information
    [KERNEL][STOCK][4.4.2] Only Adb Insecure, a Kernel for the Google Nexus 5

    Contributors
    _AtilA_
    Kernel Special Features: Stock kernel, but with adbd running always as root, so you can adb push/pull/remount/shell/etc as root

    Version Information
    Status: Stable

    Created 2014-01-16
    Last Updated 2014-01-16
    Click to expand...
    Click to collapse

    FWIW: The MEGA link does not work natively with the MEGA App if you attempt to download directly from your N5. The link is
    Code: 
    https://mega.co.nz/#!lJVxWCaA!QA4Zo04_bnzxEjmHDyjUDl9cFiAjJ5QCuIzuYFNbnFU
    View
    1
    O
    osebee
    _AtilA_ said:
    I thought that it could be usefull to somebody else so... here you have.
    Click to expand...
    Click to collapse

    This insecure boot works good for stock 4.4.3.
    remount... delele... etc... by adb.

    Thank you.
    View

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