Calif✓

@calif_io

We're https://t.co/KTEDnC3tKt. Join us to make the Internet safer for your mum and everyone else: https://t.co/eUFMLkWHiA.

34 Following17.3K Followers273 Posts
  1. Calif✓@calif_io
    Demos we presented at Hexacon in Paris today. Everything will be released in due time. 1/ Signal 1-click
    Download
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  2. Calif✓@calif_io
    Calif
    RT @lcfr_hax: Team work makes the dream work <3 We wanted to do something a bit different than using LLM's to generate all the pieces from exploit, writeup and art. We decided on a human created comic to offset the LLM usage in our release, that tells the tale with some exaggerated scenarios inspired from a few movies. If you liked the art (or want your own exploit story/comic..) check out her work at
    Calif @calif_io
    Do you know who illustrated the comic on Her name is Stephanie Cortes. And her husband is the hacker who discovered php2shell: @lcfr_hax. This artist-hacker couple has the best story, stay tuned!
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  3. Calif✓@calif_io
    Do you know who illustrated the comic on Her name is Stephanie Cortes. And her husband is the hacker who discovered php2shell: @lcfr_hax. This artist-hacker couple has the best story, stay tuned!
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  4. Calif✓@calif_io
    Calif
    RT @infosec_au: Just published our high fidelity scanner for php2shell: See our detection logic here: We've taken care in our detection logic and hope it helps defenders. Congrats to @calif_io and @lcfr_hax for the discovery.
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  5. Calif✓@calif_io
    Calif
    RT @NSACyber: UPDATE: Specific mitigation guidance for the recently identified PHP critical vulnerabilities is now available. Secure your servers today. Guidance and technical steps here:
    NSA Cyber @NSACyber
    Effective Immediately, all organizations using PHP for their systems are advised to be prepared for an update addressing two critical vulnerabilities. PHP is widely used for web applications. These vulnerabilities often provide a direct path to the server's file system or database. If an immediate update is not feasible, it is recommend that organizations take the system offline until it can be fully mitigated. NSA will follow up shortly with more specific guidance.
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  6. NSA Cyber✓@NSACyber
    Effective Immediately, all organizations using PHP for their systems are advised to be prepared for an update addressing two critical vulnerabilities. PHP is widely used for web applications. These vulnerabilities often provide a direct path to the server's file system or database. If an immediate update is not feasible, it is recommend that organizations take the system offline until it can be fully mitigated. NSA will follow up shortly with more specific guidance.
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  7. Calif✓@calif_io
    Calif
    RT @hdmoore: If you're looking for the most detailed AND *entertaining* way to read about the php2shell bugs, the Calif post is epic:
    0380226
  8. Calif✓@calif_io
    Calif
    RT @eastdakota: Some stats on #php2shell. In the 10 hours before it was publicly announced, across the @Cloudflare network we saw thousands of attempts to exploit it. That jumped to tens of thousands in the 45 minutes post announcement, hundreds of thousands within 2 hours, and millions now.
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  9. Calif✓@calif_io
    Calif
    RT @wiz_io: AI tools helped find one of the most severe online bugs ever #php2shell In our latest episode of Crying Out Cloud, Amitai Cohen sits down with @sagitz_ (Wiz Research) and Thai Duong (@calif_io) to unpack the massive PHP2Shell vulnerability
    0110278
  10. Calif✓@calif_io
    PM of the Netherlands is closely monitoring situation surrounding the vulnerabilities in PHP. Hmm does it mean that he’s watching the heap?!
    Rob Jetten @MinPres
    Het kabinet volgt de situatie rond de kwetsbaarheden in PHP nauwgezet. Het advies van het Nationaal Cyber Security Centrum @ncsc_nl is helder: installeer de patch direct en houd kwetsbare systemen offline tot dat is gebeurd. Websites als DigiD en MijnOverheid komen weer online zodra dat veilig kan.
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  11. Rob Jetten✓@MinPres
    Het kabinet volgt de situatie rond de kwetsbaarheden in PHP nauwgezet. Het advies van het Nationaal Cyber Security Centrum @ncsc_nl is helder: installeer de patch direct en houd kwetsbare systemen offline tot dat is gebeurd. Websites als DigiD en MijnOverheid komen weer online zodra dat veilig kan.
    David van Weel @ministerjenv
    De impact van de PHP-kwetsbaarheden kan fors zijn en daarom adviseert @ncsc_nl partijen hun website tijdelijk offline te halen om misbruik te kunnen voorkomen. Er is nu een patch die deze kwetsbaarheden verhelpt.
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  12. Calif✓@calif_io
    We guess you could say things are gettin' pretty serious when the Prime Minister of Japan is urging everyone to update PHP.
    高市早苗 @takaichi_sanae
    皆様に、今夜に対応して頂きたい大至急のお願いです。   多くのウェブサイトで使用されているPHPに関し、PHPのセキュリティチームが、重大な2件の脆弱性に関する注意喚起を行っています。   公開しているウェブサイトでPHPを使用しているか確認し、今夜、10月21日午後11時(日本時間)に公開される修正パッチについて、可及的速やかに適用できるよう準備をお願いします。   修正パッチを速やかに適用することが困難な場合は、例えばウェブサイト等を一時的に停止させることも、リスクを低減させるための有効策の一つと考えられます。   国家サイバー統括室のXアカウントでも関係する情報を発信していますので、そちらも参考にして下さい。 国家サイバー統括室(注意・警戒情報)(@cyber_forecast) / X
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  13. 高市早苗✓@takaichi_sanae
    皆様に、今夜に対応して頂きたい大至急のお願いです。   多くのウェブサイトで使用されているPHPに関し、PHPのセキュリティチームが、重大な2件の脆弱性に関する注意喚起を行っています。   公開しているウェブサイトでPHPを使用しているか確認し、今夜、10月21日午後11時(日本時間)に公開される修正パッチについて、可及的速やかに適用できるよう準備をお願いします。   修正パッチを速やかに適用することが困難な場合は、例えばウェブサイト等を一時的に停止させることも、リスクを低減させるための有効策の一つと考えられます。   国家サイバー統括室のXアカウントでも関係する情報を発信していますので、そちらも参考にして下さい。 国家サイバー統括室(注意・警戒情報)(@cyber_forecast) / X
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  14. Calif✓@calif_io
    “forget helping CSPs, this is probably the most significant moment in securing the internet -- taking 4chan down” —@justdionysus
    Download
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  15. Calif✓@calif_io
    Calif
    RT @gdb: Over the past two months, we have been leading a coalition to mitigate one of the most severe bugs in open source software found in recent memory, php2shell, found as part of our Patch the Planet initiative.
    03020289
  16. Calif✓@calif_io
    Calif
    RT @watchtowrcyber: Congratulations to the team at @calif_io (specifically @lcfr_hax) for the discovery of PHP2Shell. We've now shared further information aimed at helping end users, but credit for this amazing work goes to @calif_io and @lcfr_hax
    0310255
  17. Calif✓@calif_io
    Calif
    RT @itszn13: php2shell is the most consequential vulnerability I have ever helped discover. I am proud of how our team worked closely in coordination with the PHP Foundation to provide support and to harden the patch in preparation for this release.

Please read more about our approach:
    OpenAI @OpenAI
    OpenAI models helped researchers—operating as part of our Patch the Planet initiative—discover critical security flaws in PHP, an open-source programming language used to run an estimated 70% of websites. Over the past two months, we led a coalition of maintainers, researchers, and security providers to prepare fixes and protections ahead of disclosure. This duration was necessary because the fix was quite intricate and required a major change to the PHP engine. Every site using PHP can now safely upgrade their version to stay secure, in addition to applying mitigations from various security vendors. Due to the severity of these flaws and PHP’s widespread use, we consider this bug to be one of the most impactful vulnerabilities in recent memory. It also marks a new phase, where AI can find security bugs with internet-scale impact. This is an example of the Defender’s Window in action: to our knowledge, frontier AI was able to find this vulnerability ahead of attackers, giving defenders time to prepare.
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  18. Calif✓@calif_io
    Calif
    RT @itszn13: Largest credit goes to @lcfr_hax for the earliest recent discovery of the bug class. This underlying engine issue was so wide it invited a lot of parallel discovery. As we coordinated our findings the scope of the problem continued to expand!
    0130251
  19. Calif✓@calif_io
    Calif
    RT @justdionysus: Fancy human generated comics, a good story, and an annoyingly pervasive root cause. Yes, it’s exploitable. Yes, it’s exploitable under ASLR. Yes, disclosure was eventful. @lcfr_hax hacked the planet and then tried to patch it
    Calif @calif_io
    php2shell - A tale of two PHP remote vulnerabilities:
    070288
  20. Calif✓@calif_io
    php2shell - A tale of two PHP remote vulnerabilities:
    Download
    19223641131K
  21. Calif✓@calif_io
    Calif
    RT @OpenAI: OpenAI models helped researchers—operating as part of our Patch the Planet initiative—discover critical security flaws in PHP, an open-source programming language used to run an estimated 70% of websites. Over the past two months, we led a coalition of maintainers, researchers, and security providers to prepare fixes and protections ahead of disclosure. This duration was necessary because the fix was quite intricate and required a major change to the PHP engine. Every site using PHP can now safely upgrade their version to stay secure, in addition to applying mitigations from various security vendors. Due to the severity of these flaws and PHP’s widespread use, we consider this bug to be one of the most impactful vulnerabilities in recent memory. It also marks a new phase, where AI can find security bugs with internet-scale impact. This is an example of the Defender’s Window in action: to our knowledge, frontier AI was able to find this vulnerability ahead of attackers, giving defenders time to prepare.
    02.8K0252
  22. Calif✓@calif_io
    Let’s set the record straight: @lcfr_hax was the first to discover php2shell and develop a working exploit. See his August 5 tweet: His work convinced the PHP Foundation to invest in fixing this entire bug class. He then worked around the clock to review, test, and retest the patches.
    LCFR @lcfr_hax
    d935be023a55b04681eccd1d2b8385b4b295e141a5df108e5e979d8d5d7124ac
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  23. LCFR✓@lcfr_hax
    d935be023a55b04681eccd1d2b8385b4b295e141a5df108e5e979d8d5d7124ac
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  24. Calif✓@calif_io
    Posts @calif_io
    Great coverage by WSJ:
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  25. Calif✓@calif_io
    Posts @calif_io
    Please patch, following PHP official advisory:
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