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benhawkes's profile
Ben Hawkes
Ben Hawkes
Ben Hawkes
@benhawkes

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Ben Hawkes

@benhawkes

Project Zero team lead

Joined August 2008

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    1. Dino A. Dai Zovi‏ @dinodaizovi Apr 22
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      Dino A. Dai Zovi Retweeted

      I have questions: "Avraham based most of his conclusions on data from 'crash reports,' which are generated when programs fail in mid-task on a device. He was then able to recreate a technique that caused the controlled crashes." https://twitter.com/Bing_Chris/status/1252989125520654339 …

      Dino A. Dai Zovi added,

      This Tweet is unavailable.
      2 replies 4 retweets 33 likes
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    2. Dino A. Dai Zovi‏ @dinodaizovi Apr 22
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      My question is basically this: if the exploit deletes the e-mails when it succeeds, it probably also would either a) not crash or b) delete the crash report too. So the crash report is likely from a failed exploit. In that case, it wouldn't have been able to delete the email.

      4 replies 3 retweets 16 likes
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    3. Dino A. Dai Zovi‏ @dinodaizovi Apr 22
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      I also didn't follow how the crashes described could be leveraged for reliable RCE on those versions of iOS. That doesn't mean it's not possible, just that I don't see how MIME decoding gets you a predictable heap layout and/or address leak feedback to craft ROP chain, etc.

      1 reply 2 retweets 13 likes
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    4. Dino A. Dai Zovi‏ @dinodaizovi Apr 22
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      I'd love to read a follow-up blog post on how to exploit these vulnerabilities.

      2 replies 5 retweets 13 likes
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    5. thaddeus e. grugq‏ @thegrugq Apr 22
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      Replying to @dinodaizovi

      So much this. After the patch is out P0 should do a write up. //cc @taviso @benhawkes

      1 reply 1 retweet 7 likes
      Ben Hawkes‏ @benhawkes Apr 22
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      Replying to @thegrugq @dinodaizovi @taviso

      Nicolas Joly's research on Outlook is the closest modern analog I know of: https://i.blackhat.com/USA-19/Wednesday/us-19-Joly-Hunting-For-Bugs-Catching-Dragons.pdf … -- note that his strategy sensibly involved getting to the VBScript attack surface or using logic bugs. cc @n_joly

      1:09 PM - 22 Apr 2020
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      • Sunghyun Park Flameyyy Mysterie Marius (wishi) 0x5A1F Gurpiarasingh DuqueDeTuring sakura Tavis Ormandy
      2 replies 3 retweets 12 likes
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        2. thaddeus e. grugq‏ @thegrugq Apr 22
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          Replying to @benhawkes @dinodaizovi and

          If you can look at iOS Mail, that might make a great write up:)

          1 reply 0 retweets 0 likes
        3. Dino A. Dai Zovi‏ @dinodaizovi Apr 23
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          Replying to @thegrugq @benhawkes and

          I would also absolutely believe that there indeed are reliably remotely exploitable vulnerabilities in Mail, I'm just not yet convinced that these particular crashers are them.

          1 reply 3 retweets 3 likes
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        2. Nicolas Joly‏ @n_joly Apr 22
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          Replying to @benhawkes @thegrugq and

          Yup I'd love to see that write up too. You need a really good bug for this kind of 1 shot exploit

          2 replies 0 retweets 2 likes
        3. thaddeus e. grugq‏ @thegrugq Apr 23
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          Replying to @n_joly @benhawkes and

          Given all the crash files it wasn’t a true 1 shot. They kept sending until they got a shell. So they kinda brute forced it. Still, very interested in how it ever worked w/o heap grooming...

          0 replies 1 retweet 2 likes
        4. End of conversation

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