Send News. Want a reply? Read this. More in the FAQ.   News Forum - All Forums - Mobile - PDA - RSS Headlines  RSS Headlines   Twitter  Twitter
Customize
User Settings
Styles:
LAN Parties
Upcoming one-time events:

Regularly scheduled events

Firm Says Steam URLs Exploitable

Startup vulnerability research and consultancy firm ReVuln says the way Steam handles steam:// protocol URLs leaves users open to having vulnerabilities in Steam and their game exploited, reports Computerworld, who say their request for comment on this was not immediately fulfilled by Valve (thanks Ant). A proof-of-concept trailer shows what they are talking about, and here's a bit:

According to tests performed by the ReVuln researchers, Internet Explorer 9, Google Chrome and Opera display warnings and the full or partial steam:// URLs before passing them to the Steam client for execution. Firefox also requests user confirmation, but doesn't display the URL and provides no warning, while Safari automatically executes steam:// URLs without user confirmation, the researchers said.

"All the browsers that execute external URL handlers directly without warnings and those based on the Mozilla engine (like Firefox and SeaMonkey) are a perfect vector to perform silent Steam Browser Protocol calls," the researchers said. "Additionally for browsers like Internet Explorer and Opera it's still possible to hide the dodgy part of the URL from being shown in the warning message by adding several spaces into the steam:// URL itself."

Aside from tricking users to manually click on rogue steam:// URLs, attackers can use JavaScript code loaded on malicious pages to redirect browsers to such URLs, Luigi Auriemma said Tuesday via email.

View
32. It's not hard. You simply guess. Oct 17, 2012, 19:47 hb3d
 
In order to make this exploit work, you need to be able to cause something to create the file, in order to be able to execute it.
As I wrote before, if a Source engine game is installed, it can be made to do that with this exploit.

If you don't know what's installed, you have no attack vector.
You simply guess. Sure it won't affect people who don't have a Source game installed, but so many Steam users do, and so many use the default location for Steam that it isn't hard to find a vulnerable target. It was the exact same thing with the Uplay exploit. The specified path to the executable to run in that exploit was simply a guess on the target's directory structure and installed programs. Windows also still has a %path% variable that will execute anything in that path without knowing the full path.

Even their unreal engine exploit requires a upk file to exist already, in order to cause it to crash(integer overflow).
It already exists in the Sanctum game. That is why they chose that game over the dozens of other Unreal engine games on Steam.

But in the latter case, you need to know "what" you're running into to make it do something.
As I wrote before, you simply guess and target the most likely spots. Hackers have been doing that forever, and guess what? It works.

This comment was edited on Oct 17, 2012, 20:06.
 
Previous Post Next Post Reply Quote Edit Delete Report
 
    Date Subject Author
  1. Oct 17, 11:29 Re: Firm Says Steam URLs Exploitable Verno
  2. Oct 17, 11:32  Re: Firm Says Steam URLs Exploitable descender
  4. Oct 17, 11:40   Re: Firm Says Steam URLs Exploitable Kajetan
  3. Oct 17, 11:39 Re: Firm Says Steam URLs Exploitable Verno
  5. Oct 17, 11:50 Re: Firm Says Steam URLs Exploitable Jivaro
  6. Oct 17, 11:52  Re: Firm Says Steam URLs Exploitable descender
  8. Oct 17, 11:55  Re: Firm Says Steam URLs Exploitable Creston
  9. Oct 17, 12:10  Re: Firm Says Steam URLs Exploitable Mashiki Amiketo
  7. Oct 17, 11:53 Re: Firm Says Steam URLs Exploitable Creston
  14. Oct 17, 12:47  Re: Firm Says Steam URLs Exploitable bozu
  10. Oct 17, 12:19 Re: Firm Says Steam URLs Exploitable Verno
  11. Oct 17, 12:29  Re: Firm Says Steam URLs Exploitable deqer
  18. Oct 17, 16:10   Re: Firm Says Steam URLs Exploitable Kosumo
  21. Oct 17, 17:47    Re: Firm Says Steam URLs Exploitable Prez
  23. Oct 17, 17:52     Re: Firm Says Steam URLs Exploitable hb3d
  22. Oct 17, 17:49    It is hard to get a reply from Valve. hb3d
  26. Oct 17, 18:24    Re: Firm Says Steam URLs Exploitable Verno
  28. Oct 17, 18:30     Re: Firm Says Steam URLs Exploitable Prez
  30. Oct 17, 18:49      Re: Firm Says Steam URLs Exploitable Mashiki Amiketo
  31. Oct 17, 19:41       That is NOT enough. hb3d
  33. Oct 17, 19:51        Re: That is NOT enough. Prez
  34. Oct 17, 19:53         Re: That is NOT enough. hb3d
  35. Oct 17, 19:58          Re: That is NOT enough. Prez
  36. Oct 17, 20:02           Re: That is NOT enough. hb3d
  37. Oct 17, 20:15           Re: That is NOT enough. nin
  38. Oct 17, 20:19        Re: That is NOT enough. Mashiki Amiketo
  39. Oct 17, 20:26         You are wrong again. hb3d
  40. Oct 17, 20:30          Re: You are wrong again. Mashiki Amiketo
  41. Oct 17, 20:35           Re: You are wrong again. hb3d
  43. Oct 17, 20:43            Re: You are wrong again. Sepharo
  44. Oct 17, 20:48             No subject hb3d
  47. Oct 17, 21:09              Re: Firm Says Steam URLs Exploitable Sepharo
  48. Oct 17, 21:22               It's good advice but not foolproof. hb3d
  49. Oct 17, 21:26                Re: It's good advice but not foolproof. Sepharo
  50. Oct 17, 21:29                 Re: It's good advice but not foolproof. Sepharo
  51. Oct 17, 21:31                  Re: It's good advice but not foolproof. nin
  52. Oct 17, 21:40                   Re: It's good advice but not foolproof. Prez
  53. Oct 17, 22:13                    I hate hypocrisy and blind bias. hb3d
  55. Oct 17, 22:29                     Re: I hate hypocrisy and blind bias. Prez
  56. Oct 17, 22:44                     Re: I hate hypocrisy and blind bias. Dades
  54. Oct 17, 22:15                    Re: It's good advice but not foolproof. nin
  57. Oct 18, 07:58                     Re: It's good advice but not foolproof. TheVocalMinority
  58. Oct 18, 08:53                  Re: It's good advice but not foolproof. Verno
  12. Oct 17, 12:41  Re: Firm Says Steam URLs Exploitable theyarecomingforyou
  13. Oct 17, 12:44 Re: Firm Says Steam URLs Exploitable Verno
  15. Oct 17, 13:24 Re: Firm Says Steam URLs Exploitable Mashiki Amiketo
  19. Oct 17, 17:07  This goes way beyond being a browser exploit. hb3d
  20. Oct 17, 17:35   Re: This goes way beyond being a browser exploit. BobBob
  24. Oct 17, 17:55   Re: This goes way beyond being a browser exploit. Mashiki Amiketo
  25. Oct 17, 17:58    Re: This goes way beyond being a browser exploit. hb3d
  27. Oct 17, 18:27     Re: This goes way beyond being a browser exploit. Mashiki Amiketo
>> 32. Oct 17, 19:47      It's not hard. You simply guess. hb3d
  16. Oct 17, 14:17 Re: Firm Says Steam URLs Exploitable LC
  17. Oct 17, 15:13 Re: Firm Says Steam URLs Exploitable jamiedj99
  63. Oct 18, 13:19  Re: Firm Says Steam URLs Exploitable LaxerFL
  29. Oct 17, 18:45 Re: Firm Says Steam URLs Exploitable Closed Betas
  42. Oct 17, 20:42 Re: Firm Says Steam URLs Exploitable Sepharo
  45. Oct 17, 20:51 Re: Firm Says Steam URLs Exploitable pacbowl
  46. Oct 17, 20:54  Re: Firm Says Steam URLs Exploitable hb3d
  59. Oct 18, 10:44 Re: Firm Says Steam URLs Exploitable Dev
  60. Oct 18, 10:55 Re: Firm Says Steam URLs Exploitable avianflu
  62. Oct 18, 11:20  Re: Firm Says Steam URLs Exploitable Verno
  65. Oct 18, 15:36  Re: Firm Says Steam URLs Exploitable descender
  66. Oct 18, 16:40   Re: Firm Says Steam URLs Exploitable Prez
  67. Oct 18, 17:58    Re: Firm Says Steam URLs Exploitable Dev
  68. Oct 19, 00:13     Re: Firm Says Steam URLs Exploitable Prez
  69. Oct 19, 10:32    Re: Firm Says Steam URLs Exploitable Mr. Tact
  61. Oct 18, 11:01 Re: Firm Says Steam URLs Exploitable Dev
  64. Oct 18, 15:30 Re: Firm Says Steam URLs Exploitable descender


footer

Blue's News logo