oss-sec mailing list archives
Re: Re: Fwd: x86 ROP mitigation
From: Josh Bressers <bressers () redhat com>
Date: Tue, 17 Nov 2015 13:57:19 -0500 (EST)
----- Original Message -----
Is that really the right approach vs. preventing hijacking of flow control via return pointers and function pointers? It doesn't really seem like there's an end game in mind where it actually prevents ROP rather than just removing many useful gadgets. Making useful ROP gadgets harder to find doesn't mean much, since tools are used to find them and the tools can be improved if it becomes necessary. i.e. why not just go with something like PaX's RAP (things like CPI/SafeStack could work too, but SafeStack requires hardware support that's not available on x86_64 and ARM yet) Preventing ROP by preventing hijacking of flow control in the first place isn't as good as outright preventing memory corruption (i.e. the bugs are still exploitable in many cases) but at least it wipes out a form of exploitation entirely and forces techniques that are not always going to accomplish everything that's desired. Chipping away at gadgets doesn't do that unless they're entirely gone, and it's hard to see how that could happen without higher performance costs than simply doing full memory safety (not like ASAN, but rather with GC).
Why not both? Security is about layers, this is a nice place for a new security layer. -- JB
Current thread:
- x86 ROP mitigation Solar Designer (Nov 17)
- Message not available
- Re: Fwd: x86 ROP mitigation Bernd Schmidt (Nov 17)
- Re: Fwd: x86 ROP mitigation Jeff Law (Nov 17)
- Re: Re: Fwd: x86 ROP mitigation Daniel Micay (Nov 17)
- Re: Re: Fwd: x86 ROP mitigation Josh Bressers (Nov 17)
- Re: Re: Fwd: x86 ROP mitigation Daniel Micay (Nov 17)
- Re: Re: Fwd: x86 ROP mitigation Josh Bressers (Nov 17)
- Re: Re: Fwd: x86 ROP mitigation Daniel Micay (Nov 17)
- Re: Fwd: x86 ROP mitigation Bernd Schmidt (Nov 17)
- Message not available
- Re: Re: Fwd: x86 ROP mitigation Rich Felker (Nov 17)
- Re: Re: Fwd: x86 ROP mitigation Daniel Micay (Nov 17)
- Re: Fwd: x86 ROP mitigation Solar Designer (Nov 17)
- Re: Fwd: x86 ROP mitigation Florian Weimer (Nov 18)
- Data on Linux attacks (was Re: [oss-security] Re: Fwd: x86 ROP mitigation) Josh Bressers (Nov 18)
- Re: Data on Linux attacks (was Re: [oss-security] Re: Fwd: x86 ROP mitigation) Kurt Seifried (Nov 18)
- Re: Re: Fwd: x86 ROP mitigation Steve Grubb (Nov 18)