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Re: libass ass_outline.c signed integer overflow


From: "David A. Wheeler" <dwheeler () dwheeler com>
Date: Thu, 19 Nov 2020 11:54:07 -0500



On Nov 19, 2020, at 12:34 AM, Ian Zimmerman <itz () very loosely org> wrote:

On 2020-09-29 08:19, Fstark wrote:

In `ass_outline_construct`'s call to `outline_stroke` a signed integer
overflow happens *(undefined behaviour)*. On my machine signed overflow
happens to wrap around to a negative value, thus failing the assert.
https://github.com/libass/libass/issues/431

https://github.com/libass/libass/pull/432

I have followed the links above, and this seems to be an example of a
situation where the CVE process has failed. It is still not fixed in
Debian, possibly for that reason. I'll report a Debian bug today.

I read through the issue discussion. As best as I can tell, no one filed for a CVE, so there was no CVE.
Did I misunderstand something?

If my understanding is correct, that is *NOT* a failure of the CVE process.

--- David A. Wheeler


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