Date: Mon, 25 Jul 2022 12:15:40 +0700 From: Pedro Ribeiro <pedrib@...il.com> To: oss-security@...ts.openwall.com Subject: Re: CVE Request: heap buffer overflow in gdk-pixbuf On 24/07/2022 10:35, Pedro Ribeiro wrote: > >> On 24 Jul 2022, at 01:08, John Helmert III <ajak@...too.org> wrote: >> >> On Sat, Jul 23, 2022 at 07:35:42PM +0700, Pedro Ribeiro wrote: >>> Hi, >>> >>> A year ago I found and submitted a vulnerability to the gdk-pixbuf tracker: >>> https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/issues/190 >>> >>> It's a heap buffer overflow using a crafted GIF, which is likely >>> exploitable in 32 bit systems. Full details are in the link above in the >>> bug tracker. >>> >>> This was patched and the fix was merged 8 months ago as seen here: >>> https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/merge_requests/121 >>> >>> The issue is now public, but since no CVE was attributed, it probably is >>> not being considered as a problem for downstream users of the package. >>> >>> As of today, the latest Debian stable package is affected by this >>> vulnerability. Using a GNOME file system browser and browsing to that >>> folder will cause a crash, as will opening it up in a GNOME image viewer >>> and even attempting to load it in Chromium (should have submitted to >>> them for a bounty :D). >>> >>> Hence I'd like to get a CVE to raise awareness for this issue, so that >>> downstream users of the package can get patched. >>> >>> Thanks and regards, >>> Pedro Ribeiro >> >> Hi, according to the oss-security Openwall wiki page , CVEs need to >> be requested via MITRE's web form . >> >>  https://oss-security.openwall.org/wiki/mailing-lists/oss-security >>  https://cveform.mitre.org/ > > Hi John, > > Thanks for the info, will request via the form and post here again once I have a CVE number. In any case I hope this post is useful to raise awareness of the issue to distro maintainers. > > Regards > Pedro > > Actually I was wrong, this doesn't crash Chromium! But it still crashes with a heap buffer overflow in GNOME file explorer and GNOME image viewers (anything using gdk-pixbuf really) as said in the previous email though. Here's the CVE number that was attributed by MITRE: CVE-2021-46829. I've put a copy of the PoC and bug report at https://github.com/pedrib/PoC/blob/master/fuzzing/CVE-2021-46829/CVE-2021-46829.md Regards, Pedro
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