PATCH SUPEE 5344 not working on 1.8.0.0

[merlinimattia]

As in the object, the patch that Magento claim to need (at backend login) doesn't work on CE 1.8.0.0 . I've tested many sites with original core files and nothing works.
The error I get is listed below:

# sh ./PATCH_SUPEE-5344_CE_1.8.0.0_v1-2015-02-10-08-10-38.sh
Checking if patch can be applied/reverted successfully...
ERROR: Patch can't be applied/reverted successfully.

patching file app/code/core/Mage/Admin/Model/Observer.php
Hunk #1 FAILED at 44.
Hunk #2 FAILED at 58.
Hunk #3 FAILED at 69.
3 out of 3 hunks FAILED -- saving rejects to file app/code/core/Mage/Admin/Model/Observer.php.rej
patching file app/code/core/Mage/Core/Controller/Request/Http.php
Hunk #1 FAILED at 76.
Hunk #2 FAILED at 534.
2 out of 2 hunks FAILED -- saving rejects to file app/code/core/Mage/Core/Controller/Request/Http.php.rej
patching file app/code/core/Mage/Oauth/controllers/Adminhtml/Oauth/AuthorizeController.php
Hunk #1 FAILED at 55.
1 out of 1 hunk FAILED -- saving rejects to file app/code/core/Mage/Oauth/controllers/Adminhtml/Oauth/AuthorizeController.php.rej
patching file app/code/core/Mage/XmlConnect/Model/Observer.php
Hunk #1 FAILED at 143.
Hunk #2 FAILED at 160.
2 out of 2 hunks FAILED -- saving rejects to file app/code/core/Mage/XmlConnect/Model/Observer.php.rej
patching file lib/Varien/Db/Adapter/Pdo/Mysql.php
Hunk #1 FAILED at 2834.
1 out of 1 hunk FAILED -- saving rejects to file lib/Varien/Db/Adapter/Pdo/Mysql.php.rej

On 1.9.x everything is fine.

[theMageComp · Accepted solution]

Hello @merlinimattia 

Checkout this blog, we have mentioned other ways to install patch for the magento,

https://magecomp.com/blog/how-to-install-magento-security-patches/

Let me know if you still face any issues,

SECURITY DISCLAIMER: The above website contains Magento Security Patch files which are self-hosted by the user and as such unsafe. Magento Forum advise all users to only download patch files from the official Magento Downloads page.