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For SSL, I hope there's more tools like Echo Mirage[1] or PaiMei[2] which could just hook SSL dynamic modules instead of MITM CA cert spoofing. You can encrypt

by est 14y ago

For SSL, I hope there's more tools like Echo Mirage[1] or PaiMei[2] which could just hook SSL dynamic modules instead of MITM CA cert spoofing. You can encrypt/decrypt TLS/SSL traffic by intercepting read/write calls for Schannel SSP/OpenSSL. I hope some project could support Android and iOS using similar methods. [1] http://www.bindshell.net/tools/echomirage http://www.bindshell.net/tools/echomirage [2] https://github.com/OpenRCE/paimei https://github.com/OpenRCE/paimei

bazzargh 14y ago
Cert spoofing also gets you past issues in dev with self-signed certs etc. Hooking into OpenSSL will leave you with the problems in your browser. This is particularly handy when the browser hits one of the many, many issues where it won't even make a request; eliminating all of the cert issues at a stroke without modifying the browser is at least a step towards diagnosing the problem. Although it would be nice if chrome logged why it isn't making those requests.
daeken 14y ago
These are good for certain specific tests, but they're too inconsistent to trust for professional testing. There's always the chance that you're hooking the wrong thing (or nothing at all, in the case of a statically linked OpenSSL in a version you don't know/have FLIRT-ish symbols for). I used to use this technique a whole lot, but I've gone to 100% MITMing via cert spoofing/replacement.
- thirsteh 14y ago
  Though, so is using a SOCKS or HTTP proxy. To be consistent, the tool should really be reading PCAP dumps. Too many applications either don't support proxies, or only use them for some things. The best exception to this that I can think of is Chrome, which even tunnels Silverlight and Flash through its defined proxy.
- tptacek 14y ago
  Ironically, it has been a week of not being able to do that, and instead surreptitiously patching binaries and (in one case) a kernel, here at the shop. I read the parent comment earlier and thought "man, I miss Pai Mei."
  - daeken 14y ago
    Yeah, there are definitely cases where you can't swap out certs and all that, but in those cases the automated tools just fall down anyway. I don't miss the days of manually compiling OpenSSL with specific flags to generate just the right FLIRT symbols to find the methods I needed to hook.

by est 14y ago

bazzargh 14y ago

Cert spoofing also gets you past issues in dev with self-signed certs etc. Hooking into OpenSSL will leave you with the problems in your browser. This is particularly handy when the browser hits one of the many, many issues where it won't even make a request; eliminating all of the cert issues at a stroke without modifying the browser is at least a step towards diagnosing the problem. Although it would be nice if chrome logged why it isn't making those requests.

daeken 14y ago

These are good for certain specific tests, but they're too inconsistent to trust for professional testing. There's always the chance that you're hooking the wrong thing (or nothing at all, in the case of a statically linked OpenSSL in a version you don't know/have FLIRT-ish symbols for). I used to use this technique a whole lot, but I've gone to 100% MITMing via cert spoofing/replacement.

thirsteh 14y ago
Though, so is using a SOCKS or HTTP proxy. To be consistent, the tool should really be reading PCAP dumps. Too many applications either don't support proxies, or only use them for some things. The best exception to this that I can think of is Chrome, which even tunnels Silverlight and Flash through its defined proxy.
tptacek 14y ago
Ironically, it has been a week of not being able to do that, and instead surreptitiously patching binaries and (in one case) a kernel, here at the shop. I read the parent comment earlier and thought "man, I miss Pai Mei."
- daeken 14y ago
  Yeah, there are definitely cases where you can't swap out certs and all that, but in those cases the automated tools just fall down anyway. I don't miss the days of manually compiling OpenSSL with specific flags to generate just the right FLIRT symbols to find the methods I needed to hook.