[OpenPKG-SA-2005.008] OpenPKG Security Advisory (bzip2)
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OpenPKG Security Advisory The OpenPKG Project
http://www.openpkg.org/security.html http://www.openpkg.org
openpkg-security@xxxxxxxxxxx openpkg@xxxxxxxxxxx
OpenPKG-SA-2005.008 10-Jun-2005
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Package: bzip2
Vulnerability: arbitrary file mode modification, denial of service
OpenPKG Specific: no
Affected Releases: Affected Packages: Corrected Packages:
OpenPKG CURRENT <= bzip2-1.0.2-20050324 >= bzip2-1.0.3-20050506
<= analog-6.0-20041220 >= analog-6.0-20050608
OpenPKG 2.3 <= bzip2-1.0.2-2.3.0 >= bzip2-1.0.2-2.3.1
<= analog-6.0-2.3.0 >= analog-6.0-2.3.1
OpenPKG 2.2 <= bzip2-1.0.2-2.2.0 >= bzip2-1.0.2-2.2.1
Affected Releases: Dependent Packages:
OpenPKG CURRENT apache::with_mod_php_bzip2 bsdtar clamav gnupg
imagemagick libarchive perl-comp perl-mail pgpdump
php::with_bzip2 php5::with_bzip2 python::with_bzip2
r rzip
OpenPKG 2.3 apache::with_mod_php_bzip2 clamav gnupg imagemagick
perl-comp perl-mail php::with_bzip2 php5::with_bzip2
OpenPKG 2.2 apache::with_mod_php_bzip2 clamav imagemagick
perl-comp perl-mail php::with_bzip2
Description:
According to a BugTraq posting [0], Imran Ghory discovered a time
of check time of use (TOCTOU) file mode vulnerability in the BZip2
data compressor [1]. Because bzip2(1) does not safely restore the
mode of a file undergoing compression or decompression, a malicious
user can potentially change the mode of any file belonging to the
user running bzip2(1). The Common Vulnerabilities and Exposures (CVE)
project assigned the identifier CAN-2005-0953 [2] to this problem.
In a unrelated case, a denial of service vulnerability was found
in both the bzip2(1) program and its associated library libbz2(3).
Specially crafted BZip2 archives lead to an infinite loop in the
decompressor which results in an indefinitively large output file.
This could be exploited to cause disk space exhaustion. The Common
Vulnerabilities and Exposures (CVE) project assigned the identifier
CAN-2005-1260 [3] to this problem.
Because the OpenPKG bootstrap package embeds BZip2, it is affected as
well. Please refer to OpenPKG-SA-2005.010-openpkg for details [4].
Please check whether you are affected by running "<prefix>/bin/openpkg
rpm -q bzip2". If you have the "bzip2" package installed and its
version is affected (see above), we recommend that you immediately
upgrade it (see Solution) and any dependent packages as well [5][6].
Solution:
Select the updated source RPM appropriate for your OpenPKG release
[7][8], fetch it from the OpenPKG FTP service [9][10] or a mirror
location, verify its integrity [11], build a corresponding binary
RPM from it [5] and update your OpenPKG installation by applying the
binary RPM [6]. For the most recent release OpenPKG 2.3, perform the
following operations to permanently fix the security problem (for
other releases adjust accordingly).
$ ftp ftp.openpkg.org
ftp> bin
ftp> cd release/2.3/UPD
ftp> get bzip2-1.0.2-2.3.1.src.rpm
ftp> bye
$ <prefix>/bin/openpkg rpm -v --checksig bzip2-1.0.2-2.3.1.src.rpm
$ <prefix>/bin/openpkg rpm --rebuild bzip2-1.0.2-2.3.1.src.rpm
$ su -
# <prefix>/bin/openpkg rpm -Fvh <prefix>/RPM/PKG/bzip2-1.0.2-2.3.1.*.rpm
We recommend that you rebuild and reinstall any dependent packages
(see above) as well [5][6]. The "openpkg build" tool can be
instrumental in consistently updating and securing the entire OpenPKG
instance.
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References:
[0] http://marc.theaimsgroup.com/?l=bugtraq&m=111229375217633
[1] http://www.bzip.org/
[2] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0953
[3] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1260
[4] http://www.openpkg.org/security/OpenPKG-SA-2005.010-openpkg.html
[5] http://www.openpkg.org/tutorial.html#regular-source
[6] http://www.openpkg.org/tutorial.html#regular-binary
[7] ftp://ftp.openpkg.org/release/2.3/UPD/bzip2-1.0.2-2.3.1.src.rpm
[8] ftp://ftp.openpkg.org/release/2.2/UPD/bzip2-1.0.2-2.2.1.src.rpm
[9] ftp://ftp.openpkg.org/release/2.3/UPD/
[10] ftp://ftp.openpkg.org/release/2.2/UPD/
[11] http://www.openpkg.org/security.html#signature
________________________________________________________________________
For security reasons, this advisory was digitally signed with the
OpenPGP public key "OpenPKG <openpkg@xxxxxxxxxxx>" (ID 63C4CB9F) of the
OpenPKG project which you can retrieve from http://pgp.openpkg.org and
hkp://pgp.openpkg.org. Follow the instructions on http://pgp.openpkg.org/
for details on how to verify the integrity of this advisory.
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