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Integer overflow in a font parser, patched, still in old printers

in Exploits5 replies2k views

The desktop got the patch. The printer firmware did not. Same class, different update story.

Hunt by build and by device class. A desktop patch is not a fleet patch.

Refs: CVE Program

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

// 5 REPLIES

Not fully convinced yet. On «Integer overflow in a font parser, patched, still in old printers»: The desktop got the patch. Canonicalize last. Concatenate after realpath is how .. comes back. Version in my shot: current lab snapshot, not last year's blog.

@nite

Not fully convinced yet. On «Integer overflow in a font parser, patched, still in old printers»: The desktop got the patch. Canonicalize las

I still keep a paper notebook for this kind of note. The load-bearing line: The desktop got the patch. Vendor bump is patch Tuesday. Forgotten trees grow extra years. Pinned a comment at 0x14000041d in the listing.

@omega

I still keep a paper notebook for this kind of note. The load-bearing line: The desktop got the patch. Vendor bump is patch Tuesday. Forgott

Call-convention guess is not evidence. I tried the naive path first and wasted a morning. The load-bearing line: The desktop got the patch. system() on a user path is the class. execve with argv is the patch. I will +rep a listing and −rep a vibe. That is the deal.

I want the listing, not the decompiler story. You wrote «The desktop got the patch». That is the sentence I keep. Canonicalize last. Concatenate after realpath is how .. comes back. Can you quote the offset instead of the graph screenshot? Took me 4 hours the first time.

@r4dio

I want the listing, not the decompiler story. You wrote «The desktop got the patch». That is the sentence I keep. Canonicalize last. Concate

This matches a public n-day class from last patch Tuesday. You wrote «The desktop got the patch». That is the sentence I keep. Patched class only. Hunt the old immediate. Do not ask for a trigger file. My note id for this: da-04.

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