oss-sec mailing list archives
Re: Heartbleed, clients and Android
From: Hanno Böck <hanno () hboeck de>
Date: Wed, 9 Apr 2014 12:21:29 +0200
On Wed, 9 Apr 2014 11:54:58 +0200 Yves-Alexis Perez <corsac () debian org> wrote:
On Wed, Apr 09, 2014 at 11:30:29AM +0200, Hanno Böck wrote:I was asking myself some questions and I think others with more insight into what heartbleed means may be able to answer quickly: How does this affect client software? The PoCs we see send some malicous payload to servers and get some memory dumps. That doesn't affect clients?Yes, it does affect clients.
Can anyone explain how an attack scenario would work? Is it like: * we have a Man-in-the-Middle. * Client/Server establish connection. * MitM inserts a malicious package with the heartbeat-payload and sends it to the client, client parses package, verifying MAC fails, but it still will output memory Or is it ONLY an issue if we contact a malicious server that may extract random information from the application's memory? (which would reduce the impact somewhat, e.g. operating system update systems or wget etc. wouldn't have to worry)
Because the latter would include Android. We are all pretty aware that android updates are in large parts nonexistent.I don't have much clue about Android, but I think I heard heartbeat was disabled in Android, but I don't have a link right now. Also, I'm unsure what actually use libssl in Android and what uses NSS.
Seems Android disabled Heartbeat in 2012: https://android.googlesource.com/platform/external/openssl.git/+/android-4.1.2_r1 Still leaves some android versions as potentially vulnerable. -- Hanno Böck http://hboeck.de/ mail/jabber: hanno () hboeck de GPG: BBB51E42
Attachment:
signature.asc
Description:
Current thread:
- Heartbleed, clients and Android Hanno Böck (Apr 09)
- Re: Heartbleed, clients and Android Yves-Alexis Perez (Apr 09)
- Re: Heartbleed, clients and Android Hanno Böck (Apr 09)
- Re: Heartbleed, clients and Android Yves-Alexis Perez (Apr 09)
- Re: Heartbleed, clients and Android Nick Kralevich (Apr 09)
- Re: Heartbleed, clients and Android Eric Lacombe (Apr 09)
- Re: Heartbleed, clients and Android Hanno Böck (Apr 09)
- Re: Heartbleed, clients and Android Hanno Böck (Apr 09)
- Re: Heartbleed, clients and Android Yves-Alexis Perez (Apr 09)