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taviso's profile
Tavis Ormandy
Tavis Ormandy
Tavis Ormandy
Verified account
@taviso

Tweets

Tavis OrmandyVerified account

@taviso

Vulnerability researcher at Google. This is a personal stream, opinions expressed are mine.

California
taviso.decsystem.org
Joined April 2008

Tweets

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    Tavis Ormandy‏Verified account @taviso 30 Dec 2019
    • Report Tweet

    Tavis Ormandy Retweeted MaTt

    Interesting question, is this a UAC bypass? My first thought is no, because UIPI means you can't automate the interaction. Therefore, the only way to exploit it is if you could have just clicked OK in the UAC consent anyway.... right? (yes, I know UAC is not a supported boundary)https://twitter.com/harr0ey/status/1211075032400760832 …

    Tavis Ormandy added,

    MaTt @harr0ey
    [New-Post] UAC bypass using Perfmon.exe https://medium.com/@mattharr0ey/uac-bypass-via-font-in-perfmon-exe-options-2b4779955d9e …
    3:03 PM - 30 Dec 2019
    • 6 Retweets
    • 31 Likes
    • Wim Remes KremlinSec bohops 23kid @blu3_team David Wells Artem I. Baranov Andre Gironda Truneski
    6 replies 6 retweets 31 likes
      1. New conversation
      2. David Wells‏ @CE2Wells 30 Dec 2019
        • Report Tweet
        Replying to @taviso

        could be if you use SendInput or SetCursorPos to get around UIPI.

        1 reply 0 retweets 0 likes
      3. Tavis Ormandy‏Verified account @taviso 30 Dec 2019
        • Report Tweet
        Replying to @CE2Wells

        That's what UIPI is supposed to prevent. If you know a way around it, that's probably a real vulnerability, because you could (for example) do it to the consent dialog..

        2 replies 0 retweets 5 likes
      4. 1 more reply
      1. Felix aka [xi-tauw]‏ @PsiDragon 30 Dec 2019
        • Report Tweet
        Replying to @taviso

        I converted this into UAC bypass some time ago. https://amonitoring.ru/article/uac_bypass_english/ …

        0 replies 2 retweets 3 likes
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      1. New conversation
      2. MaTt‏ @harr0ey 31 Dec 2019
        • Report Tweet
        Replying to @taviso

        Agreed, although I see that cobalt strike has a UAC bypass which asks the victims to click on yes or no, so, If UAC bypass operation should happen without interaction, why does the method of Cobalt strike UAC bypass asks the victim to click yes or no to get the administrator?

        2 replies 0 retweets 0 likes
      3. Ori Damari‏ @0xrepnz Dec 31
        • Report Tweet
        Replying to @harr0ey @taviso

        I guess the method in cobalt strike is used to "trick" to user to click yes. UAC is not meant to prevent stupid users from clicking yes.. The method in cobalt strike is not really a UAC bypass either..

        1 reply 0 retweets 1 like
      4. 5 more replies
      1. bohops‏ @bohops 30 Dec 2019
        • Report Tweet
        Replying to @taviso

        I was always under the impression that the goal of UAC bypass was to run an elevated payload without interaction. Maybe such cases where interaction avoids the "sanity prompt" can be considered a bypass as well? I think its a stretch, IMO.

        0 replies 0 retweets 3 likes
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      1. Yunhai Zhang‏ @_f0rgetting_ 31 Dec 2019
        • Report Tweet
        Replying to @taviso

        If this is a UAC bypass, then almost all high integrity process with UI is a UAC bypass, so ...

        0 replies 0 retweets 3 likes
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      1. Ori Damari‏ @0xrepnz Dec 31
        • Report Tweet
        Replying to @taviso

        Ori Damari Retweeted Ɓarwisᴉɐͷ

        This is not a UAC bypass. Look here for another example:https://twitter.com/z3roTrust/status/1174998670342836224?s=19 …

        Ori Damari added,

        Ɓarwisᴉɐͷ @z3roTrust
        Bypassing Windows User Account Control - via @z3roTrust #Microsoft #Hacking #RedTeam #PrivilegeEscalation #InformationSecurity https://medium.com/@z3roTrust/bypassing-windows-user-account-control-9051c6a85734?aduc=5sEDRWu1568976488023 …
        0 replies 0 retweets 0 likes
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