安全公告

FreeBSD-SA-14:28.file

发表: delphij
时间: 2014/12/11 15:09:43

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512

=============================================================================
FreeBSD-SA-14:28.file Security Advisory
The FreeBSD Project

Topic: Multiple vulnerabilities in file(1) and libmagic(3)

Category: contrib
Module: file
Announced: 2014-12-10
Affects: All supported versions of FreeBSD.
Credits: Thomas Jarosch of Intra2net AG
Corrected: 2014-12-10 08:26:53 UTC (stable/10, 10.1-STABLE)
2014-12-10 08:35:55 UTC (releng/10.1, 10.1-RELEASE-p1)
2014-12-10 08:36:07 UTC (releng/10.0, 10.0-RELEASE-p13)
2014-12-10 08:31:41 UTC (stable/9, 9.3-STABLE)
2014-12-10 08:36:40 UTC (releng/9.3, 9.3-RELEASE-p6)
2014-12-10 08:36:40 UTC (releng/9.2, 9.2-RELEASE-p16)
2014-12-10 08:36:40 UTC (releng/9.1, 9.1-RELEASE-p23)
2014-12-10 08:31:41 UTC (stable/8, 8.4-STABLE)
2014-12-10 08:36:40 UTC (releng/8.4, 8.4-RELEASE-p20)
CVE Name: CVE-2014-3710, CVE-2014-8116, CVE-2014-8117

For general information regarding FreeBSD Security Advisories,
including descriptions of the fields above, security branches, and the
following sections, please visit <URL:http://security.FreeBSD.org/>.

I. Background

The file(1) utility attempts to classify file system objects based on
filesystem, magic number and language tests.

The libmagic(3) library provides most of the functionality of file(1)
and may be used by other applications.

II. Problem Description

There are a number of denial of service issues in the ELF parser used
by file(1).

III. Impact

An attacker who can cause file(1) or any other applications using the
libmagic(3) library to be run on a maliciously constructed input can
cause the application to crash or consume excessive CPU resources,
resulting in a denial-of-service.

IV. Workaround

No workaround is available, but systems where file(1) and other
libmagic(3)-using applications are never run on untrusted input are not
vulnerable.

V. Solution

Perform one of the following:

1) Upgrade your vulnerable system to a supported FreeBSD stable or
release / security branch (releng) dated after the correction date.

2) To update your vulnerable system via a binary patch:

Systems running a RELEASE version of FreeBSD on the i386 or amd64
platforms can be updated via the freebsd-update(8) utility:

# freebsd-update fetch
# freebsd-update install

3) To update your vulnerable system via a source code patch:

The following patches have been verified to apply to the applicable
FreeBSD release branches.

a) Download the relevant patch from the location below, and verify the
detached PGP signature using your PGP utility.

[FreeBSD 10.1]
# fetch http://security.FreeBSD.org/patches/SA-14:28/file-12.patch # fetch http://security.FreeBSD.org/patches/SA-14:28/file-12.patch.asc # gpg --verify file-12.patch.asc

[FreeBSD 9.1, 9.2, 9.3 and 10.0]
# fetch http://security.FreeBSD.org/patches/SA-14:28/file-8.patch # fetch http://security.FreeBSD.org/patches/SA-14:28/file-8.patch.asc # gpg --verify file-8.patch.asc

[FreeBSD 8.4]
# fetch http://security.FreeBSD.org/patches/SA-14:28/file-7.patch # fetch http://security.FreeBSD.org/patches/SA-14:28/file-7.patch.asc # gpg --verify file-7.patch.asc

b) Apply the patch. Execute the following commands as root:

# cd /usr/src
# patch < /path/to/patch

c) Recompile the operating system using buildworld and installworld as
described in <URL:http://www.FreeBSD.org/handbook/makeworld.html>.

Restart all deamons using the library, or reboot the system.

VI. Correction details

The following list contains the correction revision numbers for each
affected branch.

Branch/path Revision
- -------------------------------------------------------------------------
stable/8/ r275669
releng/8.4/ r275672
stable/9/ r275669
releng/9.1/ r275672
releng/9.2/ r275672
releng/9.3/ r275672
stable/10/ r275668
releng/10.0/ r275671
releng/10.1/ r275670
- -------------------------------------------------------------------------

To see which files were modified by a particular revision, run the
following command, replacing NNNNNN with the revision number, on a
machine with Subversion installed:

# svn diff -cNNNNNN --summarize svn://svn.freebsd.org/base
Or visit the following URL, replacing NNNNNN with the revision number:

<URL:http://svnweb.freebsd.org/base?view=revision&revision=NNNNNN>

VII. References

<URL:http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3710>

<URL:http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-8116>

<URL:http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-8117>

The latest revision of this advisory is available at
<URL:http://security.FreeBSD.org/advisories/FreeBSD-SA-14:28.file.asc>
-----BEGIN PGP SIGNATURE-----
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=+w7r
-----END PGP SIGNATURE-----

安全公告
网站: FreeBSD China FreeBSD简体中文计划 The FreeBSD Project
FreeBSD China 版权所有 (C) 1999 - 2010 网站设计 著作权和商标

Since Jun 28, 2002.