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Re: security fix in X11 (libxfont - xfree86)



On Sunday 20 August 2006 13:17, Daniel Stone wrote:
> > I've now taken the time to test with the badfont.  At the moment,
> > following the above procedure, xfontsel still crashes, with
> >
> > X Error of failed request:  BadAlloc (insufficient resources for
> > operation)
> >   Major opcode of failed request:  45 (X_OpenFont)
> >   Serial number of failed request:  1392
> >   Current serial number in output stream:  1393
> >
> > CVE-2006-3467 refers in fact to freetype2.2, not libxfont.  So while
> > libxfont needs the patch, the bug is not fully solved until
> > freetype's patch is also applied (reported in Debian bug
> > #379920)
>
> That would seem to me to be the desired behaviour: the server is
> staying alive, and it's refusing to let you open an invalid font.

Yes, when testing with the current sarge version, my whole xserver 
crashed; with the patched version I get a similar error to the one above 
which seems a vast improvement.

Had to find out how to create a fonts.dir file from nothing (as mkfontdir 
refuses to parse the font) before I could do the test though :-/

BTW, The font also crashes fontforge (0.0.20041218-0.1) with a segfault.

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