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  3. #Mythos finds a #curl vulnerability

#Mythos finds a #curl vulnerability

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  • bagder@mastodon.socialB bagder@mastodon.social

    #Mythos finds a #curl vulnerability

    yes, as in singular one.

    Link Preview Image
    Mythos finds a curl vulnerability

    yes, as in singular one. Back in April 2026 Anthropic caused a lot of media noise when they concluded that their new AI model Mythos is dangerously good at finding security flaws in source code. Apparently Mythos was so good at this that Anthropic would not release this model to the public yet but instead … Continue reading Mythos finds a curl vulnerability →

    favicon

    daniel.haxx.se (daniel.haxx.se)

    spitfire@mastodon.deS This user is from outside of this forum
    spitfire@mastodon.deS This user is from outside of this forum
    spitfire@mastodon.de
    wrote last edited by
    #34

    @bagder one? wow, that really was worth burning the planet's resources. 😆

    1 Reply Last reply
    0
    • quinn@social.circl.luQ quinn@social.circl.lu

      @bagder I suspect the question is, will it still be a worthwhile tool when the actual price to use the tool, not subsidized by anyone's war chest or VC, is revealed?

      kleisli@mastodon.socialK This user is from outside of this forum
      kleisli@mastodon.socialK This user is from outside of this forum
      kleisli@mastodon.social
      wrote last edited by
      #35

      @quinn my current opinion: for security scans and reviews, AI tools are and will be useful, but not to generate code. @bagder

      quinn@social.circl.luQ 1 Reply Last reply
      0
      • bagder@mastodon.socialB bagder@mastodon.social

        @gnirre no idea, probably not

        gnirre@mastodon.socialG This user is from outside of this forum
        gnirre@mastodon.socialG This user is from outside of this forum
        gnirre@mastodon.social
        wrote last edited by
        #36

        @bagder Maybe my question should have been if Alpha Omega knew? Your access was "inofficial"?

        bagder@mastodon.socialB 1 Reply Last reply
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        • gnirre@mastodon.socialG gnirre@mastodon.social

          @bagder Maybe my question should have been if Alpha Omega knew? Your access was "inofficial"?

          bagder@mastodon.socialB This user is from outside of this forum
          bagder@mastodon.socialB This user is from outside of this forum
          bagder@mastodon.social
          wrote last edited by
          #37

          @gnirre I don't know how much they asked or told A about when this was done. It's not "my" access, someone else has the access and ran the analysis

          1 Reply Last reply
          0
          • kleisli@mastodon.socialK kleisli@mastodon.social

            @quinn my current opinion: for security scans and reviews, AI tools are and will be useful, but not to generate code. @bagder

            quinn@social.circl.luQ This user is from outside of this forum
            quinn@social.circl.luQ This user is from outside of this forum
            quinn@social.circl.lu
            wrote last edited by
            #38

            @kleisli @bagder
            if it's something like 10,000 euros a pop, it might not be worth security scans and reviews, except for governmental clients.

            0x0@hachyderm.io0 1 Reply Last reply
            0
            • synlogic4242@social.vivaldi.netS synlogic4242@social.vivaldi.net

              @bagder b-b-b-but curl is not in Rust!

              frankgevaerts@mastodon.socialF This user is from outside of this forum
              frankgevaerts@mastodon.socialF This user is from outside of this forum
              frankgevaerts@mastodon.social
              wrote last edited by
              #39

              @synlogic4242 @bagder Yes, someone really needs to get on to that rewriting thing. Just a pity there hasn't been a weekend in *years* so nobody had the chance!

              1 Reply Last reply
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              • quinn@social.circl.luQ quinn@social.circl.lu

                @kleisli @bagder
                if it's something like 10,000 euros a pop, it might not be worth security scans and reviews, except for governmental clients.

                0x0@hachyderm.io0 This user is from outside of this forum
                0x0@hachyderm.io0 This user is from outside of this forum
                0x0@hachyderm.io
                wrote last edited by
                #40

                @quinn

                Especially if it's subscription-based, as these models seem to be good at finding only specific sets of problems and then dry out, but even 10k per use is really gov or big corpo territory.

                @kleisli @bagder

                quinn@social.circl.luQ 1 Reply Last reply
                0
                • bagder@mastodon.socialB bagder@mastodon.social

                  My personal conclusion can however not end up with anything else than that the big hype around this model so far was primarily marketing. I see no evidence that this setup finds issues to any particular higher or more advanced degree than the other tools have done before Mythos. Maybe this model is a little bit better, but even if it is, it is not better to a degree that seems to make a significant dent in code analyzing.

                  redsakana@infosec.exchangeR This user is from outside of this forum
                  redsakana@infosec.exchangeR This user is from outside of this forum
                  redsakana@infosec.exchange
                  wrote last edited by
                  #41

                  @bagder This suggests a fun exercise for someone interested in messing around with LLMs:

                  1. Put back all the curl security issues previously found by LLM tools by dropping the fix commits from history or otherwise obfuscating the revert.

                  2. Feed the re-vulnerabilized repo to a selection of models and see what are the cheapest ones (by memory, time and/or monetary cost) that can find, say, 50%/75%/100% of the issues found by the warehouse-scale "foundation models".

                  Feels like a large part of the current results should be doable with significantly smaller resources, because being trained on every tweet and reddit post and libgen book ever is not obviously related to the task.

                  utf_7@mastodon.socialU 1 Reply Last reply
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                  • bagder@mastodon.socialB bagder@mastodon.social

                    #Mythos finds a #curl vulnerability

                    yes, as in singular one.

                    Link Preview Image
                    Mythos finds a curl vulnerability

                    yes, as in singular one. Back in April 2026 Anthropic caused a lot of media noise when they concluded that their new AI model Mythos is dangerously good at finding security flaws in source code. Apparently Mythos was so good at this that Anthropic would not release this model to the public yet but instead … Continue reading Mythos finds a curl vulnerability →

                    favicon

                    daniel.haxx.se (daniel.haxx.se)

                    eobet@oldbytes.spaceE This user is from outside of this forum
                    eobet@oldbytes.spaceE This user is from outside of this forum
                    eobet@oldbytes.space
                    wrote last edited by
                    #42

                    @bagder great, so even the Linux Foundation are naming things after the ultimate evil of a famous franchise? (Final Fantasy in this instance.)

                    1 Reply Last reply
                    0
                    • bagder@mastodon.socialB bagder@mastodon.social

                      #Mythos finds a #curl vulnerability

                      yes, as in singular one.

                      Link Preview Image
                      Mythos finds a curl vulnerability

                      yes, as in singular one. Back in April 2026 Anthropic caused a lot of media noise when they concluded that their new AI model Mythos is dangerously good at finding security flaws in source code. Apparently Mythos was so good at this that Anthropic would not release this model to the public yet but instead … Continue reading Mythos finds a curl vulnerability →

                      favicon

                      daniel.haxx.se (daniel.haxx.se)

                      phl@mastodon.socialP This user is from outside of this forum
                      phl@mastodon.socialP This user is from outside of this forum
                      phl@mastodon.social
                      wrote last edited by
                      #43

                      @bagder “On average, every single production source code line of curl has been written (and then rewritten) 4.14 times.”

                      curl is the ship of Theseus not once, not twice, but four times 😄

                      1 Reply Last reply
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                      • gnirre@mastodon.socialG gnirre@mastodon.social

                        @bagder How do you explain that Mythos found 271 bugs in Firefox, and counting, and only 1 in cURL. Is the Firefox code base 271 times larger?

                        4censord@unfug.social4 This user is from outside of this forum
                        4censord@unfug.social4 This user is from outside of this forum
                        4censord@unfug.social
                        wrote last edited by
                        #44

                        @gnirre @bagder with the most glancing of looks, looking at the 150 version of firefox (and some rounding),
                        curl: 200k lines of c
                        firefox:

                        • 5M lines of rust
                        • 9M lines of C and C++
                        • 200k lines of assembly
                        • 2M lines of python

                        so like, without looking at anything else, firefox is significantly bigger

                        natanox@chaos.socialN 1 Reply Last reply
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                        • km@mastodon.babb.noK km@mastodon.babb.no

                          @bagder from my talks with people who had been given access to mythos in their org, they say it does find things which current tools miss, but also overlooks cases which current tools catch. so, yeah, to me it is "mostly marketing" combined with general FUD

                          paco@infosec.exchangeP This user is from outside of this forum
                          paco@infosec.exchangeP This user is from outside of this forum
                          paco@infosec.exchange
                          wrote last edited by
                          #45

                          @km As far as I can tell:

                          • No one who has worked with raw Mythos output has ever written about it.
                          • No one who has written about it has ever used it.

                          They would much rather have @bagder writing about it because his opinion carries weight. That means he can’t have direct access. To give him access, they’d demand to gag him with an NDA, like everyone else who has access.

                          This technique of making readers mentally fill in the gaps between what is verifiable and what is claimed is genius marketing and really dishonest. But we have come to expect systematic and casual dishonesty from these companies.

                          km@mastodon.babb.noK 1 Reply Last reply
                          0
                          • paco@infosec.exchangeP paco@infosec.exchange

                            @km As far as I can tell:

                            • No one who has worked with raw Mythos output has ever written about it.
                            • No one who has written about it has ever used it.

                            They would much rather have @bagder writing about it because his opinion carries weight. That means he can’t have direct access. To give him access, they’d demand to gag him with an NDA, like everyone else who has access.

                            This technique of making readers mentally fill in the gaps between what is verifiable and what is claimed is genius marketing and really dishonest. But we have come to expect systematic and casual dishonesty from these companies.

                            km@mastodon.babb.noK This user is from outside of this forum
                            km@mastodon.babb.noK This user is from outside of this forum
                            km@mastodon.babb.no
                            wrote last edited by
                            #46

                            @paco @bagder yeah, let me clarify: i talked with people who not themselves used mythos, but whose org was given access, so yeah, they just told something which they were told

                            paco@infosec.exchangeP 1 Reply Last reply
                            0
                            • 4censord@unfug.social4 4censord@unfug.social

                              @gnirre @bagder with the most glancing of looks, looking at the 150 version of firefox (and some rounding),
                              curl: 200k lines of c
                              firefox:

                              • 5M lines of rust
                              • 9M lines of C and C++
                              • 200k lines of assembly
                              • 2M lines of python

                              so like, without looking at anything else, firefox is significantly bigger

                              natanox@chaos.socialN This user is from outside of this forum
                              natanox@chaos.socialN This user is from outside of this forum
                              natanox@chaos.social
                              wrote last edited by
                              #47

                              @4censord @gnirre @bagder Also, didn't they intentionally disable all mitigations, sandboxing etc. in Firefox *and* include every teeny tiny bug it found (without mentioning the false-positives, which were probably a metric shit ton) to bolster those numbers?

                              There were lots of shenanigans afaik.

                              1 Reply Last reply
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                              • km@mastodon.babb.noK km@mastodon.babb.no

                                @paco @bagder yeah, let me clarify: i talked with people who not themselves used mythos, but whose org was given access, so yeah, they just told something which they were told

                                paco@infosec.exchangeP This user is from outside of this forum
                                paco@infosec.exchangeP This user is from outside of this forum
                                paco@infosec.exchange
                                wrote last edited by
                                #48

                                @km Yeah. I didn’t mean it personally. I wasn’t criticising what you said, I’m sorry if I sounded that way.

                                I was just pointing out this constant theme. The only thing that ever is made public is the fully-polished, human-vetted final result. They carefully hide all other details and the press don’t care.

                                @bagder

                                1 Reply Last reply
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                                • 0x0@hachyderm.io0 0x0@hachyderm.io

                                  @quinn

                                  Especially if it's subscription-based, as these models seem to be good at finding only specific sets of problems and then dry out, but even 10k per use is really gov or big corpo territory.

                                  @kleisli @bagder

                                  quinn@social.circl.luQ This user is from outside of this forum
                                  quinn@social.circl.luQ This user is from outside of this forum
                                  quinn@social.circl.lu
                                  wrote last edited by
                                  #49

                                  @0x0 @kleisli @bagder to be clear i picked that number out of my butt, but it is clear to me that it's going to be very hard to make up their investment in it, much less than the min 10x (which would probably be a couple trillion dollars)

                                  1 Reply Last reply
                                  0
                                  • rugk@chaos.socialR This user is from outside of this forum
                                    rugk@chaos.socialR This user is from outside of this forum
                                    rugk@chaos.social
                                    wrote last edited by
                                    #50

                                    @das_robin @oots @bagder maybe @firefoxnightly can comment on that

                                    1 Reply Last reply
                                    0
                                    • bagder@mastodon.socialB bagder@mastodon.social

                                      My personal conclusion can however not end up with anything else than that the big hype around this model so far was primarily marketing. I see no evidence that this setup finds issues to any particular higher or more advanced degree than the other tools have done before Mythos. Maybe this model is a little bit better, but even if it is, it is not better to a degree that seems to make a significant dent in code analyzing.

                                      peteriskrisjanis@toot.lvP This user is from outside of this forum
                                      peteriskrisjanis@toot.lvP This user is from outside of this forum
                                      peteriskrisjanis@toot.lv
                                      wrote last edited by
                                      #51

                                      @bagder 💯☝️this

                                      1 Reply Last reply
                                      0
                                      • bagder@mastodon.socialB bagder@mastodon.social

                                        My personal conclusion can however not end up with anything else than that the big hype around this model so far was primarily marketing. I see no evidence that this setup finds issues to any particular higher or more advanced degree than the other tools have done before Mythos. Maybe this model is a little bit better, but even if it is, it is not better to a degree that seems to make a significant dent in code analyzing.

                                        rootwyrm@weird.autosR This user is from outside of this forum
                                        rootwyrm@weird.autosR This user is from outside of this forum
                                        rootwyrm@weird.autos
                                        wrote last edited by
                                        #52

                                        @bagder it's all marketing. And any improvements are completely moot, as the actual *costs* to find that single bug were in the tens of thousands of dollars minimum. That's the MINIMUM known cost.
                                        It would not surprise me if finding that one bug cost $75k, $100k, $200k of compute time. It's a pile of shit, hilariously inefficient slop that sometimes behaves as a fuzzer that occasionally finds a crumb.

                                        1 Reply Last reply
                                        0
                                        • alterelefant@mastodontech.deA alterelefant@mastodontech.de

                                          @bagder
                                          At least it works. It would have been quite a disaster if it found zero.

                                          totoroot@ibe.socialT This user is from outside of this forum
                                          totoroot@ibe.socialT This user is from outside of this forum
                                          totoroot@ibe.social
                                          wrote last edited by
                                          #53

                                          @alterelefant@mastodontech.de @bagder@mastodon.social Are you a machine?
                                          Classifying finding a single vulnerability (1) as success and 0 as failure sure seems like it
                                          😁
                                          The world is not black and white and the usefulness of LLMs for finding vulnerabilities IMO isn't either

                                          alterelefant@mastodontech.deA 1 Reply Last reply
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