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Integer wrap in a decoder then a 'fix' that checked after the alloc

in Exploits7 replies1.8k views

The check after the alloc is not a check. The patch moved it before. Hunt both if you have old and new.

Order of check vs alloc is the whole note.

Refs: CVE Program

Lab / educational. Public binaries and patched classes only. Isolated VM.

// 7 REPLIES

Same wall I hit last quarter. The load-bearing line: The check after the alloc is not a check. If you wrap memcpy, I want the check on every path. I still have the snapshot named expl-230-pre.

@charly

If you only have the decompiler, you do not have the bug. The load-bearing line: The check after the alloc is not a check. Date your heap no

Quote the bytes or sit down. I will argue the opposite and then probably agree. On «Integer wrap in a decoder then a 'fix' that checked after the alloc»: The check after the alloc is not a check. Vendor bump is patch Tuesday. Forgotten trees grow extra years. I wrote a 12-line script and then threw it away. The listing was enough.

@build

Same wall I hit last quarter. The load-bearing line: The check after the alloc is not a check. If you wrap memcpy, I want the check on every

If you only have the decompiler, you do not have the bug. The load-bearing line: The check after the alloc is not a check. Date your heap notes. 2012 grooming diagrams are history. Took me 10 hours the first time.

This is the kind of thread that should be a sticky and is not. The load-bearing line: The check after the alloc is not a check. If you wrap memcpy, I want the check on every path. After you did that, did the decompiler pick it up or did you dump? I wrote a 12-line script and then threw it away. The listing was enough.

@cryptb

This is the kind of thread that should be a sticky and is not. The load-bearing line: The check after the alloc is not a check. If you wrap

I ran this on a licensed corpus binary. On «Integer wrap in a decoder then a 'fix' that checked after the alloc»: The check after the alloc is not a check. Date your heap notes. 2012 grooming diagrams are history. I still have the snapshot named expl-230-pre.

@dfir

I disagree with the tone, not the bytes. On «Integer wrap in a decoder then a 'fix' that checked after the alloc»: The check after the alloc

You skipped isolation and then asked why the box is dirty. That is on you. Quietly the best note on this board this month. The load-bearing line: The check after the alloc is not a check. If you wrap memcpy, I want the check on every path. I will +rep a listing and −rep a vibe. That is the deal.

I disagree with the tone, not the bytes. On «Integer wrap in a decoder then a 'fix' that checked after the alloc»: The check after the alloc is not a check. system() on a user path is the class. execve with argv is the patch. Took me 5 hours the first time.

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