[FFmpeg-devel] [PATCH 2/2] avformat/hls: Be more picky on extensions

[Michael Niedermayer]

On Thu, Jan 23, 2025 at 10:27:47PM +0100, Michael Niedermayer wrote:
> On Wed, Jan 22, 2025 at 09:36:09PM +0100, Michael Niedermayer wrote:
> > This blocks disallowed extensions from probing
> > It also requires all available segments to have matching extensions to the format
> > mpegts is treated independent of the extension
> > 
> > It is recommended to set the whitelists correctly
> > instead of depending on extensions, but this should help a bit,
> > and this is easier to backport
> > 
> > Fixes: CVE-2023-6602 II. HLS Force TTY Demuxer
> > Fixes: CVE-2023-6602 IV. HLS XBIN Demuxer DoS Amplification
> > 
> > The other parts of CVE-2023-6602 have been fixed by prior commits
> > 
> > Found-by: Harvey Phillips of Amazon Element55 (element55)
> > Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> > ---
> >  doc/demuxers.texi |  7 +++++++
> >  libavformat/hls.c | 50 +++++++++++++++++++++++++++++++++++++++++++++++
> >  2 files changed, 57 insertions(+)
> 
> I intend to apply this patchset soon so it receives some testing before 7.1.1

will apply


[...]

-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Those who would give up essential Liberty, to purchase a little
temporary Safety, deserve neither Liberty nor Safety -- Benjamin Franklin
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