Date: Fri, 27 Sep 2013 00:14:29 -0600 From: Kurt Seifried <kseifried@...hat.com> To: Open Source Security <oss-security@...ts.openwall.com> Subject: Re: Buffer overrun vulnerability in CHICKEN Scheme -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 09/26/2013 03:27 PM, Peter Bex wrote: > Hi all, > > I'd like to request a CVE for a recently discovered vulnerability > in CHICKEN Scheme. It affects a very particular, not very common > use of the read-string! procedure. If given a buffer and #f (the > Scheme value for "false") as the buffer's size (which should > trigger automatic size detection but doesn't), it will read beyond > the buffer, until the input port (file, socket, etc) is exhausted. > This may result in the typical potential remote code execution or > denial of service; in CHICKEN, these buffers are initially > allocated on the stack and moved to the heap upon GC. > > In normal usage, users would usually pass in the buffer's size. > This is also the workaround for this bug. > > For the official announcement, see > http://lists.nongnu.org/archive/html/chicken-announce/2013-09/msg00000.html > > The discussion thread's final accepted patch is at > http://lists.nongnu.org/archive/html/chicken-hackers/2013-09/msg00009.html > > which got applied as http://code.call-cc.org/cgi-bin/gitweb.cgi?p=chicken-core.git;a=commit;h=cd1b9775005ebe220ba11265dbf5396142e65f26 > > All versions of CHICKEN prior to 220.127.116.11 and 4.8.3 (not yet > released) are affected. > > Cheers, Peter Bex > Please use CVE-2013-4385 for this issue. - -- Kurt Seifried Red Hat Security Response Team (SRT) PGP: 0x5E267993 A90B F995 7350 148F 66BF 7554 160D 4553 5E26 7993 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.14 (GNU/Linux) iQIcBAEBAgAGBQJSRSJFAAoJEBYNRVNeJnmTp1EP/0zsOAo2k2c4DnwSk7K0XFiU uBz9zeIi+y+o2ejZrts0dkc0AFg05V1nbSnAc9Hq/mFNx8kOP+ZB3H+ExFechRLj PnE+Tl9dD/I8oKR2d8Rn95rY/z2gBZj0GoBla+EkERPwsXnXGwBklJOtjFYa1DFZ wqOg2WD17E3/P5ZdK8LoBMi86ZBwibXhWgdmNcJWGtpKWbdbO0Z7Tj6CYNLQrJMQ Nb9LqnBO5Mh2xq0unb8QegxcUdhTWPz23PciUrcml5tyL3SGrMiaBGWzunKN770B oiSV490xOpGyuoLHOAHuQcBysLYHGZ1wfOExAWvPGmuEJpjnma4KX96SCQW16PLl nfH0PpQso9D9PyATOq87hoQwtvDwR/Ez2ak0reAXyC6+kDEbpilY7r3TOiSRwrBM 1uYVt5pLFfblo6MbzgotdvdOJfAmD3pUkU4OOGT6n60CoQSb5hH0HrY16uiTatmb nQvTJNjdPA+eZ1yp1p8x0n7wVkDWcA2C56OBNVHXby/sNUd38vg3za9xRu+UQ9vJ uKuhX/m5+SkVIXhcwBDc+6kAlV15I4EfDYjBS15PryWyapmFkyimA6APsQmDswCB a3NH1w28+ToJeIeL6bmrahOp+jnepiquJwD3eJLdkPwcLUMEN5P2+M/9cVCYpXbE 8SCqKFuqKxPBAOVnpOvG =tO27 -----END PGP SIGNATURE-----
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