Re: libass ass_outline.c signed integer overflow

                							

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Re: libass ass_outline.c signed integer overflow

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From: Moritz Mühlenhoff &lt;jmm () inutil org&gt;

Date: Thu, 19 Nov 2020 19:51:04 +0100

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On Thu, Nov 19, 2020 at 11:54:07AM -0500, David A. Wheeler 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.

Yes, everything worked as designed here. This is CVE-2020-26682

Cheers,
        Moritz

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Current thread:

Re: libass ass_outline.c signed integer overflow Ian Zimmerman (Nov 18)

Re: libass ass_outline.c signed integer overflow David A. Wheeler (Nov 19)

Re: libass ass_outline.c signed integer overflow Moritz Mühlenhoff (Nov 19)

Re: libass ass_outline.c signed integer overflow Ian Zimmerman (Nov 19)

Re: Re: libass ass_outline.c signed integer overflow Salvatore Bonaccorso (Nov 19)

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