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이력서 다썼다 hyeon.me
Jihyeon Kim (김지현) retweeted
New on our Frontier Red Team blog: using Claude to formally verify software at large scale.
Formal verification can prove that code is free of certain bugs, but historically it has only been feasible for small codebases (or required a lot of expert time).
With AI models, however, this is beginning to change. In collaboration with @theoremlabs, we used Claude to prove security properties in over one hundred real-world open-source libraries over the span of a few weeks.
Read our research in full here: anthropic.com/research/forma…
Jihyeon Kim (김지현) retweeted
ㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋ
Let's Decrypt가 되었구나 아주
-4-
github.com/mitmproxy/mitmpro…
Jihyeon Kim (김지현) retweeted
이쯤에서 다시 읽어보는 @segfault87 님이 번역한
PHP: 잘못된 디자인의 프랙탈
saschanaz.github.io/PHP-a-fr…
Jihyeon Kim (김지현) retweeted
BREAKING: eMudhra exits SSL/TLS certificate business, blames social media instead of incompetence for the same
Jihyeon Kim (김지현) retweeted
Working RCE against PHP 8.5.12 (the 2026-10-21 security release that fixed CVE-2026-109618/109619).
Pure logic bug — no memory corruption,
ASAN-clean, orthogonal to the CVE-2026-109618/19 class.
Receipt: uid=33(www-data) over HTTP, one-shot
#infosec #php2shell #php
.... Dude the internet is cooked .... This can't be patched out 😈...
#CyberSecurity #infosec
Readers added context they thought people might want to know
The claimed RCE on fully-patched PHP 8.5.12 requires a custom lab app with a destructor gadget plus deliberate session.serialize_handler mismatch (php_serialize writes, legacy php reads) and non-default settings like cleanup=Off; this is an app flaw, not core PHP RCE.
github.com/rafalohaki/php…
php.net/manual/en/sess…
Dejo por aquí una POC de php2shell contra todas las versiones de php oficiales de docker y sigue siendo vulnerables hasta los parches con diferentes chains para llegar el RCE con una pequeña shell
github.com/GoldraK/php2shell…
#php #Security
We’re opening a research preview of Claude Duet, a new app where Claude works as a proactive agent.
It comes to you with what needs your attention, completes tasks you ask of it, keeps working when you step away, and checks with you before it acts on your behalf.
Jihyeon Kim (김지현) retweeted
...you people asked for it... so here's the desert 😈...
> jackalsyn.com/posts/php2shel…
> ... get it while you can ;) ... more to come soon...
#CyberSecurity #infosec
Jihyeon Kim (김지현) retweeted
THE SWITCH 2 HAS BEEN JAILBROKEN BY AI 🚨
pepsipu just released ns2jb, the first known jailbreak for the Switch 2. It's software-only and works on the latest firmware, 23.0.1.
The craziest part is that Codex did most of the hacking. He hooked both Switches up so the AI could send controller inputs, watch the screen, and even press the power button with an Amazon smart light switch whenever the console crashed. His prompt was literally "set a goal to jailbreak the switch 2. make no mistakes".
The way in was a bug in SmileBASIC, a Switch 1 game, which it then chained into Nintendo's own file system service.
Readers added context they thought people might want to know
The developer clarified the quoted prompt was a "silly caption" not actually used, and the jailbreak required substantial human effort over ~2 weeks (AI assisted with some bug-finding and the demo mod).
pepsipu.com/blog/2026-10-s…
gitlab.com/pepsipu/ns2jb
gbatemp.net/news/switch-2-…
Jihyeon Kim (김지현) retweeted
1/ Our long national nightmare is over. The wall has been smashed. New community checkpoint for integer multiplication:
κ = 0.00268647 ≈ 2⁻⁸·⁵⁴⁰
T(n) = O(n(log n)⁰·⁹⁹⁷³¹³⁵³)
A 66% improvement since last announcement. A 2^173 fold improvement from the OAI result
Jihyeon Kim (김지현) retweeted
In 2025, we published a bold proposal to use fusion reactors for gold production.
And now we’ve done it: Mercury transmuted into stable gold, using fusion neutrons, at 10x the record set by CERN in 2025.
We’ve reduced alchemy to a series of difficult but tractable engineering problems.
Jihyeon Kim (김지현) retweeted
type inference from .sql files has been achieved internally
ORMs are toast
Jihyeon Kim (김지현) retweeted
【PHPセキュリティ問題 時系列順まとめ】
今回のPHPの事案を時系列順にまとめてみました。
----
2024年:PHPの潜在的な脆弱性を発見
外部監査をきっかけにメモリ管理の問題を認識。
しかし、修正方針がまとまらず約2年間対応が停滞。
↓
2026年8月:重大な任意コード実行リスクが判明
Calif(セキュリティ企業)やOpenAIなどが、認証なしで任意コード実行(RCE)が可能な攻撃経路を報告。
PHP開発チームが修正を最優先で進める。
↓
10月21日 0時頃:脆弱性情報が事前流出
修正パッチ公開前に、2件のCVE番号がHacker Newsへ投稿され、←何してんの
それがSNSや掲示板にも拡散。
※この時点では技術的な詳細は含まれていなかった。
↓
10月21日 4時30分:PHP公式が緊急告知
情報流出を受け、パッチ公開予定を22日から21日23時(日本時間)へ前倒し。
↓
10月21日 5時頃:攻撃実証動画が誤公開
Califが攻撃の動作動画を誤って公開。←最高にカス、バカ
すぐに削除されたものの複製が拡散し、攻撃コードの開発が加速。
↓
10月21日:研究者らによる未検証情報が拡散
パッチ公開前に、@ J4ck3LSyN などによって脆弱性の原因や再現方法をSNSなどで発信する動きが発生。←余計なことをするな
↓
10月21日 16時41分:修正済みバイナリを先行公開
Chainguard(セキュリティを専門とする米国企業)が公開予定の約6時間前に修正済みコンテナイメージを配布。←最大最悪のカス、超絶ルール違反
これにより攻撃者によるパッチの差分解析が可能な状態に。
※PHP Foundationもこれを一方的なエンバーゴ違反(事前に取り決めた情報の公開禁止期間を守らないこと)と明言しています。
↓
10月21日:国内外でサービスの緊急停止が相次ぐ
修正パッチがまだ提供されていないため、国内外のWebサービスや政府機関が予防措置として一時停止・メンテナンスを実施。
↓
10月21日 23時頃:PHP公式が修正版を公開
CVE-2026-109618、CVE-2026-109619への修正を含むPHP 8.2〜8.5の更新版を公開。
↓
10月22日:情報流出と管理体制の問題が焦点に
PHP Foundationが、2024年からの修正停滞を組織的な失敗と認める。協調的な脆弱性開示が崩れた経緯も問題視される。
----
【結論】人災。
特に、
⚠️ Califが攻撃の動作動画を誤って公開したこと
⚠️ Chainguardの勝手な判断による修正済みバイナリを含むコンテナイメージの公開
が最悪。終わってます。
Jihyeon Kim (김지현) retweeted
‼️ ALERT - Someone tried to exploit #PHP2Shell 4 days before the vulnerabilities were publicly disclosed.
Amazon caught the October 17 attempt. More exploit attempts followed the patch release.
Who had the exploit details early, and how?
Full story ↓ thehackernews.com/2026/10/so…































