CVE-2007-4131: GNU tar Directory Traversal Vulnerability

Debian Bug report logs - #439335
CVE-2007-4131: GNU tar Directory Traversal Vulnerability

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Luca Bruno <luca.br@uno.it>

To: Debian Bug Tracking System <submit@bugs.debian.org>

Subject: CVE-2007-4131: GNU tar Directory Traversal Vulnerability

Date: Fri, 24 Aug 2007 11:35:22 +0200

Package: tar
Version: 1.18-1
Severity: grave
Tags: security patch

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

- From CVE-2007-4131:
"The vulnerability is caused due to an input validation error when
extracting tar archives. This can be exploited to extract files to
arbitrary locations outside the specified directory with the permissions
of the user running GNU tar by using the ".." directory traversal
sequence in a specially crafted tar archive."

A patch is available in upstream CVS:
http://cvs.savannah.gnu.org/viewvc/tar/src/names.c?root=tar&r1=1.63&r2=1.64

The same portion of code is present also in versions 1.16 (stable) and
1.14 (oldstable), so this bug should be probably tracked and fixed there
too. However I'm not sure if there are other patches already applied
there to prevent this issue, so right now I'm reporting this bug for sid
only.

Cheers, Luca

- -- System Information:
Debian Release: lenny/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (1, 'experimental')
Architecture: i386 (i686)

Kernel: Linux 2.6.20-1-686 (SMP w/1 CPU core)
Locale: LANG=it_IT.UTF-8, LC_CTYPE=it_IT.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages tar depends on:
ii  libc6                         2.6.1-1    GNU C Library: Shared libraries

tar recommends no packages.

- -- no debconf information

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Message #10 received at submit@bugs.debian.org (full text, mbox, reply):

From: Bdale Garbee <bdale@gag.com>

To: Luca Bruno <luca.br@uno.it>, 439335@bugs.debian.org

Cc: Debian Bug Tracking System <submit@bugs.debian.org>

Subject: Re: Bug#439335: CVE-2007-4131: GNU tar Directory Traversal Vulnerability

Date: Fri, 24 Aug 2007 08:44:03 -0600

On Fri, 2007-08-24 at 11:35 +0200, Luca Bruno wrote:
> Package: tar
> Version: 1.18-1
> Severity: grave

Why does this merit a 'grave' severity when there is no apparent priv
escalation involved?

Bdale

Message #24 received at 439335@bugs.debian.org (full text, mbox, reply):

From: Stefan Fritsch <sf@sfritsch.de>

To: 439335@bugs.debian.org

Subject: Re: Bug#439335: CVE-2007-4131: GNU tar Directory Traversal Vulnerability

Date: Wed, 29 Aug 2007 20:50:59 +0200

A user does not expect tar to allow absolute path names unless the -P 
option is given.

Message #31 received at 439335@bugs.debian.org (full text, mbox, reply):

From: Bdale Garbee <bdale@gag.com>

To: Stefan Fritsch <sf@sfritsch.de>, 439335@bugs.debian.org

Cc: control@bugs.debian.org

Subject: Re: Bug#439335: CVE-2007-4131: GNU tar Directory Traversal Vulnerability

Date: Wed, 29 Aug 2007 13:23:32 -0600

tags 439335 +pending
thanks

On Wed, 2007-08-29 at 20:50 +0200, Stefan Fritsch wrote:
> A user does not expect tar to allow absolute path names unless the -P 
> option is given.

That's not a justification for severity 'grave' in the Debian BTS. 

However, regardless of what we think the appropriate bug severity is,
I've just applied the patch in question in my tree and expect to upload
it soonish.

Bdale

Message #38 received at 439335-close@bugs.debian.org (full text, mbox, reply):

From: Bdale Garbee <bdale@gag.com>

To: 439335-close@bugs.debian.org

Subject: Bug#439335: fixed in tar 1.18-2

Date: Wed, 05 Sep 2007 10:32:03 +0000

Source: tar
Source-Version: 1.18-2

We believe that the bug you reported is fixed in the latest version of
tar, which is due to be installed in the Debian FTP archive:

tar_1.18-2.diff.gz
  to pool/main/t/tar/tar_1.18-2.diff.gz
tar_1.18-2.dsc
  to pool/main/t/tar/tar_1.18-2.dsc
tar_1.18-2_i386.deb
  to pool/main/t/tar/tar_1.18-2_i386.deb



A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 439335@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Bdale Garbee <bdale@gag.com> (supplier of updated tar package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@debian.org)


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Format: 1.7
Date: Wed, 05 Sep 2007 10:20:45 +0100
Source: tar
Binary: tar
Architecture: source i386
Version: 1.18-2
Distribution: unstable
Urgency: high
Maintainer: Bdale Garbee <bdale@gag.com>
Changed-By: Bdale Garbee <bdale@gag.com>
Description: 
 tar        - GNU tar
Closes: 433553 439335 439916
Changes: 
 tar (1.18-2) unstable; urgency=high
 .
   * patch from Neil Moore improving the man page, closes: #439916
   * patch from Justin Pryzby improving the man page, closes: #433553
   * patch from upstream to fix directory traversal concern on extraction
     documented in (CVE-2007-4131), closes: #439335
   * urgency to high since preceding bug has having security implications
Files: 
 87af661dc549fb89e70d4f8850859cd4 569 utils required tar_1.18-2.dsc
 7bcd67a71acb9d4c4e6b9ababc309ef9 40112 utils required tar_1.18-2.diff.gz
 d6c6861cbbf9a04cba3519f8f265d243 732978 utils required tar_1.18-2_i386.deb
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Message #43 received at 439335@bugs.debian.org (full text, mbox, reply):

From: Sylvain Beucler <beuc@gnu.org>

To: 439335@bugs.debian.org

Cc: savannah-hackers-public@gnu.org

Subject: Re: Bug#439335: CVE-2007-4131: GNU tar Directory Traversal

Date: Sun, 9 Sep 2007 10:43:15 +0200

Hi,

Was this forwarded to the Stable security team?

If I'm given a tarball that can replace /etc/passwd, I'd say this is
grave bug.

Thanks,

-- 
Sylvain

Message #48 received at 439335@bugs.debian.org (full text, mbox, reply):

From: Nico Golde <nion@debian.org>

To: Sylvain Beucler <beuc@gnu.org>, 439335@bugs.debian.org

Cc: savannah-hackers-public@gnu.org

Subject: Re: Bug#439335: CVE-2007-4131: GNU tar Directory Traversal

Date: Sun, 9 Sep 2007 14:30:06 +0200

[Message part 1 (text/plain, inline)]

Hi,
* Sylvain Beucler <beuc@gnu.org> [2007-09-09 13:56]:
> Was this forwarded to the Stable security team?
> 
> If I'm given a tarball that can replace /etc/passwd, I'd say this is
> grave bug.

This bug is monitored via the security tracker:
http://security-tracker.debian.net/tracker/CVE-2007-4131
So they should be aware of it.
Kind regards
Nico
-- 
Nico Golde - http://ngolde.de - nion@jabber.ccc.de - GPG: 0x73647CFF
For security reasons, all text in this mail is double-rot13 encrypted.

[Message part 2 (application/pgp-signature, inline)]

Message #53 received at 439335@bugs.debian.org (full text, mbox, reply):

From: paddy@panici.net

To: 439335@bugs.debian.org, debian-security@lists.debian.org

Subject: Re: Bug#439335: CVE-2007-4131: GNU tar Directory Traversal

Date: Wed, 19 Dec 2007 22:51:35 +0000

previously ...

Nico Golde <nion@debian.org> [Sun, 9 Sep 2007 14:30:06 +0200]:
> Hi,
> * Sylvain Beucler <beuc@gnu.org> [2007-09-09 13:56]:
> > Was this forwarded to the Stable security team?
> > 
> > If I'm given a tarball that can replace /etc/passwd, I'd say this is
> > grave bug.
> 
> This bug is monitored via the security tracker:
> http://security-tracker.debian.net/tracker/CVE-2007-4131
> So they should be aware of it.

just noticed this going past in an osx update and had a "what ever
happenned to that?" moment.

Regards,
Paddy

Message #58 received at 439335-close@bugs.debian.org (full text, mbox, reply):

From: Florian Weimer <fw@deneb.enyo.de>

To: 439335-close@bugs.debian.org

Subject: Bug#439335: fixed in tar 1.14-2.4

Date: Fri, 28 Dec 2007 19:52:23 +0000

Source: tar
Source-Version: 1.14-2.4

We believe that the bug you reported is fixed in the latest version of
tar, which is due to be installed in the Debian FTP archive:

tar_1.14-2.4.diff.gz
  to pool/main/t/tar/tar_1.14-2.4.diff.gz
tar_1.14-2.4.dsc
  to pool/main/t/tar/tar_1.14-2.4.dsc
tar_1.14-2.4_i386.deb
  to pool/main/t/tar/tar_1.14-2.4_i386.deb



A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 439335@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Florian Weimer <fw@deneb.enyo.de> (supplier of updated tar package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@debian.org)


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Format: 1.7
Date: Wed, 26 Dec 2007 12:19:01 +0100
Source: tar
Binary: tar
Architecture: source i386
Version: 1.14-2.4
Distribution: oldstable-security
Urgency: high
Maintainer: Bdale Garbee <bdale@gag.com>
Changed-By: Florian Weimer <fw@deneb.enyo.de>
Description: 
 tar        - GNU tar
Closes: 439335 441444
Changes: 
 tar (1.14-2.4) oldstable-security; urgency=high
 .
   * Non-maintainer upload by the security team
   * Apply patch from Dmitry V. Levin <ldv@owl.openwall.com> to avoid a
     stack-based buffer overflow while processing certain file names
     (CVE-2007-4476).  Closes: #441444.
   * Apply patch from Dmitry V. Levin to fix double-dot recognition
     in case of duplicate / (CVE-2007-4131).  Closes: #439335.
Files: 
 cbcbbd7c638de842f913ac566c3f0b0a 846 base required tar_1.14-2.4.dsc
 2675ec9acdf59ba6f0c54e5325675fcf 51869 base required tar_1.14-2.4.diff.gz
 3b1099df9c1df15768f8dc568068e02f 500822 base required tar_1.14-2.4_i386.deb

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Message #63 received at 439335-close@bugs.debian.org (full text, mbox, reply):

From: Florian Weimer <fw@deneb.enyo.de>

To: 439335-close@bugs.debian.org

Subject: Bug#439335: fixed in tar 1.16-2etch4

Date: Fri, 28 Dec 2007 19:52:16 +0000

Source: tar
Source-Version: 1.16-2etch4

We believe that the bug you reported is fixed in the latest version of
tar, which is due to be installed in the Debian FTP archive:

tar_1.16-2etch4.diff.gz
  to pool/main/t/tar/tar_1.16-2etch4.diff.gz
tar_1.16-2etch4.dsc
  to pool/main/t/tar/tar_1.16-2etch4.dsc
tar_1.16-2etch4_amd64.deb
  to pool/main/t/tar/tar_1.16-2etch4_amd64.deb



A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 439335@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Florian Weimer <fw@deneb.enyo.de> (supplier of updated tar package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@debian.org)


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Format: 1.7
Date: Wed, 26 Dec 2007 13:30:08 +0100
Source: tar
Binary: tar
Architecture: source amd64
Version: 1.16-2etch4
Distribution: stable-security
Urgency: high
Maintainer: Bdale Garbee <bdale@gag.com>
Changed-By: Florian Weimer <fw@deneb.enyo.de>
Description: 
 tar        - GNU tar
Closes: 439335 441444
Changes: 
 tar (1.16-2etch4) stable-security; urgency=high
 .
   * Non-maintainer upload by the security team
   * Apply patch from Dmitry V. Levin <ldv@owl.openwall.com> to avoid a
     stack-based buffer overflow while processing certain file names
     (CVE-2007-4476).  Closes: #441444.
   * Apply patch from Dmitry V. Levin to fix double-dot recognition
     in case of duplicate / (CVE-2007-4131).  Closes: #439335.
   * Update the autoconf scripts to the etch version (no functional
     changes, hopefully).
Files: 
 c7d9d75758a04174348cd65bb7aaab16 871 utils required tar_1.16-2etch4.dsc
 d971b9d6114ad0527ef89fab0d3167e0 2199571 utils required tar_1.16.orig.tar.gz
 96eb9bcd2d8257893a4f530eb00c9da5 31360 utils required tar_1.16-2etch4.diff.gz
 b7287060cfefae808c694a60f9cb421c 714108 utils required tar_1.16-2etch4_amd64.deb

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Message #68 received at 439335-close@bugs.debian.org (full text, mbox, reply):

From: Florian Weimer <fw@deneb.enyo.de>

To: 439335-close@bugs.debian.org

Subject: Bug#439335: fixed in tar 1.16-2etch4

Date: Sat, 16 Feb 2008 12:17:30 +0000

Source: tar
Source-Version: 1.16-2etch4

We believe that the bug you reported is fixed in the latest version of
tar, which is due to be installed in the Debian FTP archive:

tar_1.16-2etch4.diff.gz
  to pool/main/t/tar/tar_1.16-2etch4.diff.gz
tar_1.16-2etch4.dsc
  to pool/main/t/tar/tar_1.16-2etch4.dsc
tar_1.16-2etch4_amd64.deb
  to pool/main/t/tar/tar_1.16-2etch4_amd64.deb



A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 439335@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Florian Weimer <fw@deneb.enyo.de> (supplier of updated tar package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@debian.org)


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Format: 1.7
Date: Wed, 26 Dec 2007 13:30:08 +0100
Source: tar
Binary: tar
Architecture: source amd64
Version: 1.16-2etch4
Distribution: stable-security
Urgency: high
Maintainer: Bdale Garbee <bdale@gag.com>
Changed-By: Florian Weimer <fw@deneb.enyo.de>
Description: 
 tar        - GNU tar
Closes: 439335 441444
Changes: 
 tar (1.16-2etch4) stable-security; urgency=high
 .
   * Non-maintainer upload by the security team
   * Apply patch from Dmitry V. Levin <ldv@owl.openwall.com> to avoid a
     stack-based buffer overflow while processing certain file names
     (CVE-2007-4476).  Closes: #441444.
   * Apply patch from Dmitry V. Levin to fix double-dot recognition
     in case of duplicate / (CVE-2007-4131).  Closes: #439335.
   * Update the autoconf scripts to the etch version (no functional
     changes, hopefully).
Files: 
 c7d9d75758a04174348cd65bb7aaab16 871 utils required tar_1.16-2etch4.dsc
 d971b9d6114ad0527ef89fab0d3167e0 2199571 utils required tar_1.16.orig.tar.gz
 96eb9bcd2d8257893a4f530eb00c9da5 31360 utils required tar_1.16-2etch4.diff.gz
 b7287060cfefae808c694a60f9cb421c 714108 utils required tar_1.16-2etch4_amd64.deb

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Message #73 received at 439335-close@bugs.debian.org (full text, mbox, reply):

From: Florian Weimer <fw@deneb.enyo.de>

To: 439335-close@bugs.debian.org

Subject: Bug#439335: fixed in tar 1.14-2.4

Date: Sat, 12 Apr 2008 17:54:57 +0000

Source: tar
Source-Version: 1.14-2.4

We believe that the bug you reported is fixed in the latest version of
tar, which is due to be installed in the Debian FTP archive:

tar_1.14-2.4.diff.gz
  to pool/main/t/tar/tar_1.14-2.4.diff.gz
tar_1.14-2.4.dsc
  to pool/main/t/tar/tar_1.14-2.4.dsc
tar_1.14-2.4_i386.deb
  to pool/main/t/tar/tar_1.14-2.4_i386.deb



A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 439335@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Florian Weimer <fw@deneb.enyo.de> (supplier of updated tar package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@debian.org)


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Format: 1.7
Date: Wed, 26 Dec 2007 12:19:01 +0100
Source: tar
Binary: tar
Architecture: source i386
Version: 1.14-2.4
Distribution: oldstable-security
Urgency: high
Maintainer: Bdale Garbee <bdale@gag.com>
Changed-By: Florian Weimer <fw@deneb.enyo.de>
Description: 
 tar        - GNU tar
Closes: 439335 441444
Changes: 
 tar (1.14-2.4) oldstable-security; urgency=high
 .
   * Non-maintainer upload by the security team
   * Apply patch from Dmitry V. Levin <ldv@owl.openwall.com> to avoid a
     stack-based buffer overflow while processing certain file names
     (CVE-2007-4476).  Closes: #441444.
   * Apply patch from Dmitry V. Levin to fix double-dot recognition
     in case of duplicate / (CVE-2007-4131).  Closes: #439335.
Files: 
 cbcbbd7c638de842f913ac566c3f0b0a 846 base required tar_1.14-2.4.dsc
 2675ec9acdf59ba6f0c54e5325675fcf 51869 base required tar_1.14-2.4.diff.gz
 3b1099df9c1df15768f8dc568068e02f 500822 base required tar_1.14-2.4_i386.deb

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