SUSE Security Announcement: perl integer overflows (SUSE-SA:2005:071)
Posted on: 12/20/2005 05:12 PM

A security announcement from SUSE

-----BEGIN PGP SIGNED MESSAGE-----

______________________________________________________________________________

SUSE Security Announcement

Package: perl
Announcement ID: SUSE-SA:2005:071
Date: Tue, 20 Dec 2005 16:00:00 +0000
Affected Products: SUSE LINUX 10.0
SUSE LINUX 9.3
SUSE LINUX 9.2
SUSE LINUX 9.1
SuSE Linux 9.0
SuSE Linux Desktop 1.0
SuSE Linux Enterprise Server 8
SUSE Linux Enterprise Server 9
UnitedLinux 1.0
Vulnerability Type: remote denial of service
Severity (1-10): 6
SUSE Default Package: yes
Cross-References: CVE-2005-3962

Content of This Advisory:
1) Security Vulnerability Resolved:
perl integer overflows
Problem Description
2) Solution or Work-Around
3) Special Instructions and Notes
4) Package Location and Checksums
5) Pending Vulnerabilities, Solutions, and Work-Arounds:
none
6) Authenticity Verification and Additional Information

______________________________________________________________________________

1) Problem Description and Brief Discussion

Integer overflows in the format string functionality in Perl allows
attackers to overwrite arbitrary memory and possibly execute arbitrary
code via format string specifiers with large values, which causes an
integer wrap.

This requires the attacker to be able to supply format strings to the
application, which unfortunately is true for some web applications.

This issue is tracked by the Mitre CVE ID CVE-2005-3962.

2) Solution or Work-Around

There is no known workaround, please install the update packages.

3) Special Instructions and Notes

Please close and restart all running instances of daemons or web services
using perl after the update.

4) Package Location and Checksums

The preferred method for installing security updates is to use the YaST
Online Update (YOU) tool. YOU detects which updates are required and
automatically performs the necessary steps to verify and install them.
Alternatively, download the update packages for your distribution manually
and verify their integrity by the methods listed in Section 6 of this
announcement. Then install the packages using the command

rpm -Fhv <file.rpm>

to apply the update, replacing <file.rpm> with the filename of the
downloaded RPM package.


x86 Platform:

SUSE LINUX 10.0:
ftp://ftp.suse.com/pub/suse/i386/update/10.0/rpm/i586/perl-5.8.7-5.3.i586.rpm
4de87a1baabaca72b1d043f5802b55e8

SUSE LINUX 9.3:
ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/i586/perl-5.8.6-5.3.i586.rpm
bf2673a0102d07e3498ebb608a6bf86a

SUSE LINUX 9.2:
ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/i586/perl-5.8.5-3.5.i586.rpm
7f3e5f07cdf3e5adcb2bb4a1a70fcd66

SUSE LINUX 9.1:
ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/perl-5.8.3-32.9.i586.rpm
39e0469e1e258ce2a762f44010eeed44
ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/i586/perl-32bit-9.1-200512180858.i586.rpm
fcb5e777e342dc3cf7e80f25b79d6002

SuSE Linux 9.0:
ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/perl-5.8.1-133.i586.rpm
4f689e4779e62911c6707325c04bb8c7
ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/i586/perl-32bit-9.0-5.i586.rpm
3dccbba55f989dac7c1ceaeba1c15aa5

Power PC Platform:

SUSE LINUX 10.0:
ftp://ftp.suse.com/pub/suse/i386/update/10.0/rpm/ppc/perl-5.8.7-5.3.ppc.rpm
ec6e2f878cfa801f66f7b61d68c7452c

x86-64 Platform:

SUSE LINUX 10.0:
ftp://ftp.suse.com/pub/suse/i386/update/10.0/rpm/x86_64/perl-32bit-5.8.7-5.3.x86_64.rpm
a113b1b20c1df8328bc7baff457e9e11
ftp://ftp.suse.com/pub/suse/i386/update/10.0/rpm/x86_64/perl-5.8.7-5.3.x86_64.rpm
a159900f0c1d25eff753cbead86c1a9e

SUSE LINUX 9.3:
ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/x86_64/perl-32bit-9.3-7.1.x86_64.rpm
785b553f17cd5b4ee0926a90937493e5
ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/x86_64/perl-5.8.6-5.3.x86_64.rpm
301a89dfea1b345a6753601c75e7b010

SUSE LINUX 9.2:
ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/x86_64/perl-32bit-9.2-200512191352.x86_64.rpm
5f3c243a01d669afe1c1682f55eb857d
ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/x86_64/perl-5.8.5-3.5.x86_64.rpm
e484649b779194349e596203be509956

SUSE LINUX 9.1:
ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/perl-5.8.3-32.9.x86_64.rpm
cd955e730ce66e9d4ba47fbcd8ecb973

SuSE Linux 9.0:
ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/x86_64/perl-5.8.1-133.x86_64.rpm
36fe8f513fe87de69647c822f0c3d9b3

Sources:

SUSE LINUX 10.0:
ftp://ftp.suse.com/pub/suse/i386/update/10.0/rpm/src/perl-5.8.7-5.3.src.rpm
c9b1fa3cdf5c114d04445adde820062b

SUSE LINUX 9.3:
ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/src/perl-5.8.6-5.3.src.rpm
34b2ee13c4b71864af2ee166d4cee5cb

SUSE LINUX 9.2:
ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/src/perl-5.8.5-3.5.src.rpm
fdaa01f4114cffa02a248a93c9d6c2d1

SUSE LINUX 9.1:
ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/src/perl-5.8.3-32.9.src.rpm
3d448ecc6dea15f0f80791f38cdb9f55
ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/src/perl-5.8.3-32.9.src.rpm
f56950501a81a8317330251c49ef9e68

SuSE Linux 9.0:
ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/src/perl-5.8.1-133.src.rpm
76462aa014e8f9f26d227bb3974281e6
ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/src/perl-5.8.1-133.src.rpm
96e52a75014166fffdf1c926179fca72

Our maintenance customers are notified individually. The packages are
offered for installation from the maintenance web:

http://support.novell.com/cgi-bin/search/searchtid.cgi?psdb/f1f7d27ae5fa1885e9f8997fbfd489de.html
http://portal.suse.com/psdb/f1f7d27ae5fa1885e9f8997fbfd489de.html

______________________________________________________________________________

5) Pending Vulnerabilities, Solutions, and Work-Arounds:

none
______________________________________________________________________________

6) Authenticity Verification and Additional Information

- Announcement authenticity verification:

SUSE security announcements are published via mailing lists and on Web
sites. The authenticity and integrity of a SUSE security announcement is
guaranteed by a cryptographic signature in each announcement. All SUSE
security announcements are published with a valid signature.

To verify the signature of the announcement, save it as text into a file
and run the command

gpg --verify <file>

replacing <file> with the name of the file where you saved the
announcement. The output for a valid signature looks like:

gpg: Signature made <DATE> using RSA key ID 3D25D3D9
gpg: Good signature from "SuSE Security Team <security@suse.de>"

where <DATE> is replaced by the date the document was signed.

If the security team's key is not contained in your key ring, you can
import it from the first installation CD. To import the key, use the
command

gpg --import gpg-pubkey-3d25d3d9-36e12d04.asc

- Package authenticity verification:

SUSE update packages are available on many mirror FTP servers all over the
world. While this service is considered valuable and important to the free
and open source software community, the authenticity and the integrity of
a package needs to be verified to ensure that it has not been tampered
with.

There are two verification methods that can be used independently from
each other to prove the authenticity of a downloaded file or RPM package:

1) Using the internal gpg signatures of the rpm package
2) MD5 checksums as provided in this announcement

1) The internal rpm package signatures provide an easy way to verify the
authenticity of an RPM package. Use the command

rpm -v --checksig <file.rpm>

to verify the signature of the package, replacing <file.rpm> with the
filename of the RPM package downloaded. The package is unmodified if it
contains a valid signature from build@suse.de with the key ID 9C800ACA.

This key is automatically imported into the RPM database (on
RPMv4-based distributions) and the gpg key ring of 'root' during
installation. You can also find it on the first installation CD and at
the end of this announcement.

2) If you need an alternative means of verification, use the md5sum
command to verify the authenticity of the packages. Execute the command

md5sum <filename.rpm>

after you downloaded the file from a SUSE FTP server or its mirrors.
Then compare the resulting md5sum with the one that is listed in the
SUSE security announcement. Because the announcement containing the
checksums is cryptographically signed (by security@suse.de), the
checksums show proof of the authenticity of the package if the
signature of the announcement is valid. Note that the md5 sums
published in the SUSE Security Announcements are valid for the
respective packages only. Newer versions of these packages cannot be
verified.

- SUSE runs two security mailing lists to which any interested party may
subscribe:

suse-security@suse.com
- General Linux and SUSE security discussion.
All SUSE security announcements are sent to this list.
To subscribe, send an e-mail to
<suse-security-subscribe@suse.com>.

suse-security-announce@suse.com
- SUSE's announce-only mailing list.
Only SUSE's security announcements are sent to this list.
To subscribe, send an e-mail to
<suse-security-announce-subscribe@suse.com>.

For general information or the frequently asked questions (FAQ),
send mail to <suse-security-info@suse.com> or
<suse-security-faq@suse.com>.

=====================================================================
SUSE's security contact is <security@suse.com> or <security@suse.de>.
The <security@suse.de> public key is listed below.
=====================================================================
______________________________________________________________________________

The information in this advisory may be distributed or reproduced,
provided that the advisory is not modified in any way. In particular, the
clear text signature should show proof of the authenticity of the text.

SUSE Linux Products GmbH provides no warranties of any kind whatsoever
with respect to the information contained in this security advisory.

Type Bits/KeyID Date User ID
pub 2048R/3D25D3D9 1999-03-06 SuSE Security Team <security@suse.de>
pub 1024D/9C800ACA 2000-10-19 SuSE Package Signing Key <build@suse.de>

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