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Aaron Parecki

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  • Aaron Parecki https://aaronparecki.com/   •   Oct 26
    This is a good writeup on some sneaky vulnerabilities in OAuth implementations, but ultimately is just a simple access token injection attack: https://salt.security/blog/oh-auth-abusing-oauth-to-take-over-millions-of-accounts
    Aaron Parecki
    tl;dr: Don't accept access tokens in your redirect URI (don't use the implicit flow)

    PKCE solves this attack and is enforced by the server rather than relying on client developers to "verify the access token" as described in the post
    Portland, Oregon, USA • 42°F
    Thu, Oct 26, 2023 8:51am -07:00 #oauth
    4 likes 2 reposts 1 reply
    • Torstein Krause Johansen
    • Gidi Kroon
    • Aaron Ogle :linux: :manjaro:
    • Mark Drummond
    • Aaron Ogle :linux: :manjaro:
    • Scary Mary Branscombe
    • Aaron Ogle :linux: :manjaro: fosstodon.org/users/geekgonecrazy

      @aaronpk is pkce used very often? When I was initially implementing pkce in a few cli tools I didn’t see a lot of people talking about it. Most people I talk to are familiar with oauth but you mention pkce and they don’t know it

      Thu, Oct 26, 2023 9:03am -07:00
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Hi, I'm Aaron Parecki, Director of Identity Standards at Okta, and co-founder of IndieWebCamp. I maintain oauth.net, write and consult about OAuth, and participate in the OAuth Working Group at the IETF. I also help people learn about video production and livestreaming. (detailed bio)

I've been tracking my location since 2008 and I wrote 100 songs in 100 days. I've spoken at conferences around the world about owning your data, OAuth, quantified self, and explained why R is a vowel. Read more.

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