Date: Fri, 10 Aug 2012 23:03:30 -0600 From: Kurt Seifried <kseifried@...hat.com> To: oss-security@...ts.openwall.com CC: Russ Allbery <rra@...nford.edu> Subject: Re: CVE Request: rssh command-line parsing vulnerability -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 08/10/2012 02:53 PM, Russ Allbery wrote: > Hello all, > > I'm the Debian maintainer of the rssh package, which has a > security vulnerability in its command-line parsing disclosed some > time back on the rssh mailing list and on BUGTRAQ. I'm preparing a > security update for Debian and would like a CVE for tracking > purposes. > > The security advisory from the upstream maintainer is at: > http://sourceforge.net/mailarchive/message.php?msg_id=29235647 > > Here are the relevant contents: > > | rssh is a shell for restricting SSH access to a machine to only > scp, | sftp, or a small set of similar applications. | | > http://www.pizzashack.org/rssh/ | | Henrik Erkkonen has discovered > that, through clever manipulation of | environment variables on the > ssh command line, it is possible to | circumvent rssh. As far as I > can tell, there is no way to effect a | root compromise, except of > course if the root account is the one | you're attempting to > protect with rssh... | [...] | | Note in particular that ensuring > that the AcceptEnv sshd configuration | option need not be turned > on for this exploit to work. > > I think this would fit the definition of "local privilege > escalation" in that it allows users with a restricted shell to run > commands they shouldn't be able to run. > > The last two messages on the thread linked above contain a patch. > (Be aware that they've been mangled by the Sourceforge mailing list > archive, so you have to download them to see them.) There has been > no subsequent formal release, just the patch in that thread. Not sure why I didn't get this a CVE earlier, please use CVE-2012-3478 for this issue. Red Hat reference: https://bugzilla.redhat.com/show_bug.cgi?id=820414 - -- 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 v1.4.12 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQIcBAEBAgAGBQJQJeeiAAoJEBYNRVNeJnmTXBIQAMP8YfmuA7bkiyiIEjzZmghm VdR7Er8e3cPPTKCydV11/r4xr2d2+d/UUVswIXN229HONC4/x7KUVzEkPlbRJnh9 nVIgz7dbxxHmlbdSkfm8zxd7uYvWxe2IddNr80wd6skgRF1YG26+Md7nhuV/A01e 1m+qNgX1BzwoVvL3jIUKVL9thQj3IMXTqQg6OhLVE7XsPPmeHqZorgBLvRzJgAKT 3bamyIRziKMs3zxg4djEVqgv1ZtK6wkr89XgQmhW9y9oHJADub7FphrnPx3g58DR 1og2keDQXrGs0kzAvUOPif7ApzzzhRfkinREve4H9qySvXGu0zFZgiYYe3CfaMiz L1+1ntfWcNnmrFVYte8/CKtM1H43WK93Tu7TMwWcXie5v2I55mc44EAD6B0pwOEH uoy1Q8z5ZVnsiv3JTuadtwJ1HP0c4tWQ+bMiYvPC7wRHKqY7rSQ5h9loIXH0Sycn fLmOf4e9cEruuUp30OeKWj8afMVDVS4ofSlknbW9t0pGhEQ0F4ejku43gb3ql8bn BFfXnao6epqpWRSePacFh7VHF5AxmlZW/xc4RlZjKUv2R4o9kQTpdocEGXKdyFTH 85yhrqmghiH+Nk5QrrNxdSqrfqbbT8LP626QXPsPEq791xLnLcTz4JEoZ62a2qhk zqR4IzF7p5V2UEX8scvp =6Aoa -----END PGP SIGNATURE-----
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