newbieからバイナリアンへ

newbie dive into binary

昨日は海を見に行きました

Entries from 2021-02-01 to 1 month

【pwn 51.0】nutty - Union CTF 2021 [maybe not intended sol] (kernel exploit)

keywords kernel exploit / race without uffd / SLOB / seq_operations / tty_struct / bypass SMAP via kROP on kheap 1: イントロ 2: static basic module 3: Vuln kUAF / double fetch invalid show size 4: leak kernbase race via userfaultfd (FAIL) …

【pwn 50.0】DayOne - AIS3 EOF CTF 2020 Finals (kernel exploit)

keywords eBPF / verifier bug / kernel exploit / commit_creds(&init_cred) / without bpf_map.btf 1: イントロ 2: static basic patch 3: vuln ZDI-20-1440 patchの意味 最新のkernelでは というか、pointer leakが任意に可能じゃん... 4: leak kernbase …

【pwn 49.0】kernel-rop - hxp CTF 2020 (kernel exploit)

keywords kROP / FGKASLR / kernel exploit / ksymtab_xxx / rp++ 1: イントロ 2: static basic Module 3: Vuln 4: leak canary 5: kROP __ksymtab_xxx find not-randomized pointer to leak kernbase find gadget to leak the data of __ksymtab_xxx 6: get…

【pwn 48.0】hashbrown - Dice CTF 2021 (kernel exploit)

keywords kernel exploit / FGKASLR / slab / race condition / modprobe_path / shm_file_data / kUAF / shmem_vm_ops 1: イントロ 2: static basic Module 3: FGKASLR 4: Vuln: race to kUAF 5: leak and bypass FGKASLR via shm_file_data なんでseq_oper…

【pwn 47.0】flitbip - Midnightsun CTF Finals 2018 (kernel exploit)

keywords baby / kernel exploitation / n_tty_ops 1: static basic new syscall 2: get RIP 3: LPE 4: exploit 5: アウトロ 6: 参考 やっぱりリストを埋めるのそんなに楽しくないため、次からは面白そうな問題だけ解いていこうと思います。 1: static basic…

【pwn 46.0】babydriver - NCSTISC CTF 2018 (babykernel exploit)

keywords super-easy / baby / heap / UAF / slub / kernel exploit 1: イントロ 2: static analysis basics cdev fops 3: vuln 4: kernbase leak 5: get RIP 6: exploit 7: アウトロ 8: symbols without KASLR 9: 参考 1: イントロ kernel強化月間なのでい…

【pwn 45.0】SharedHouse - ASIS CTF 2020 Quals (kernel exploit)

keywords kernel exploit / heap spray / kernel ROP / slub / subprocess_info / seq_operations / msg_msg / NULL-byte overflow 1: イントロ 2: static analysis commands globals structures 3: vuln 4: まず確認 5: kernbase leak subprocess_info heap…

【pwn 44.0】spark - HITCON CTF 2020 (kernel exploit)

keywords kernel exploit / slub alocator / slubcache / setxattr / shellcode 1: イントロ 2: 問題概要 配布物 モジュール 構造体 3: Vulns refcntのインクリメント忘れ ダイクストラにおけるOOB 4: KASLR bypass/leak 最近のdmesgについて 5: UAFされてる…

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