-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ______________________________________________________________________________ SUSE Security Announcement Package: dhcp-client Announcement ID: SUSE-SA:2009:037 Date: Wed, 15 Jul 2009 14:00:00 +0000 Affected Products: openSUSE 10.3 openSUSE 11.0 openSUSE 11.1 SUSE SLES 9 Novell Linux Desktop 9 Open Enterprise Server Novell Linux POS 9 SLE SDK 10 SP2 SUSE Linux Enterprise Desktop 10 SP2 SUSE Linux Enterprise Server 10 SP2 SLED 11 SLES 11 Vulnerability Type: remote code execution Severity (1-10): 8 SUSE Default Package: yes Cross-References: CVE-2009-0692 Content of This Advisory: 1) Security Vulnerability Resolved: dhclient stack overflow Problem Description 2) Solution or Work-Around 3) Special Instructions and Notes 4) Package Location and Checksums 5) Pending Vulnerabilities, Solutions, and Work-Arounds: - ruby - samba - libpng 6) Authenticity Verification and Additional Information ______________________________________________________________________________ 1) Problem Description and Brief Discussion The DHCP client (dhclient) could be crashed by a malicious DHCP server sending an overlong subnet field (CVE-2009-0692). In theory a malicious DHCP server could exploit the flaw to execute arbitrary code as root on machines using dhclient to obtain network settings. Newer distributions (SLES10+, openSUSE) do have buffer overflow checking that guards against this kind of stack overflow though. So actual exploitability is rather unlikely. 2) Solution or Work-Around There is no known workaround, please install the update packages. 3) Special Instructions and Notes Please restart all running instances of dhclient after the update or reboot the machine. 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: openSUSE 11.1: http://download.opensuse.org/debug/update/11.1/rpm/i586/dhcp-debuginfo-3.1.1... http://download.opensuse.org/debug/update/11.1/rpm/i586/dhcp-debugsource-3.1... http://download.opensuse.org/update/11.1/rpm/i586/dhcp-3.1.1-6.5.1.i586.rpm http://download.opensuse.org/update/11.1/rpm/i586/dhcp-client-3.1.1-6.5.1.i5... http://download.opensuse.org/update/11.1/rpm/i586/dhcp-devel-3.1.1-6.5.1.i58... http://download.opensuse.org/update/11.1/rpm/i586/dhcp-relay-3.1.1-6.5.1.i58... http://download.opensuse.org/update/11.1/rpm/i586/dhcp-server-3.1.1-6.5.1.i5... openSUSE 11.0: http://download.opensuse.org/debug/update/11.0/rpm/i586/dhcp-debuginfo-3.0.6... http://download.opensuse.org/debug/update/11.0/rpm/i586/dhcp-debugsource-3.0... http://download.opensuse.org/update/11.0/rpm/i586/dhcp-3.0.6-86.4.i586.rpm http://download.opensuse.org/update/11.0/rpm/i586/dhcp-client-3.0.6-86.4.i58... http://download.opensuse.org/update/11.0/rpm/i586/dhcp-devel-3.0.6-86.4.i586... http://download.opensuse.org/update/11.0/rpm/i586/dhcp-relay-3.0.6-86.4.i586... http://download.opensuse.org/update/11.0/rpm/i586/dhcp-server-3.0.6-86.4.i58... openSUSE 10.3: http://download.opensuse.org/update/10.3/rpm/i586/dhcp-3.0.6-24.4.i586.rpm http://download.opensuse.org/update/10.3/rpm/i586/dhcp-client-3.0.6-24.4.i58... http://download.opensuse.org/update/10.3/rpm/i586/dhcp-devel-3.0.6-24.4.i586... http://download.opensuse.org/update/10.3/rpm/i586/dhcp-relay-3.0.6-24.4.i586... http://download.opensuse.org/update/10.3/rpm/i586/dhcp-server-3.0.6-24.4.i58... Power PC Platform: openSUSE 11.1: http://download.opensuse.org/debug/update/11.1/rpm/ppc/dhcp-debuginfo-3.1.1-... http://download.opensuse.org/debug/update/11.1/rpm/ppc/dhcp-debugsource-3.1.... http://download.opensuse.org/update/11.1/rpm/ppc/dhcp-3.1.1-6.5.1.ppc.rpm http://download.opensuse.org/update/11.1/rpm/ppc/dhcp-client-3.1.1-6.5.1.ppc... http://download.opensuse.org/update/11.1/rpm/ppc/dhcp-devel-3.1.1-6.5.1.ppc.... http://download.opensuse.org/update/11.1/rpm/ppc/dhcp-relay-3.1.1-6.5.1.ppc.... http://download.opensuse.org/update/11.1/rpm/ppc/dhcp-server-3.1.1-6.5.1.ppc... openSUSE 11.0: http://download.opensuse.org/debug/update/11.0/rpm/ppc/dhcp-debuginfo-3.0.6-... http://download.opensuse.org/debug/update/11.0/rpm/ppc/dhcp-debugsource-3.0.... http://download.opensuse.org/update/11.0/rpm/ppc/dhcp-3.0.6-86.4.ppc.rpm http://download.opensuse.org/update/11.0/rpm/ppc/dhcp-client-3.0.6-86.4.ppc.... http://download.opensuse.org/update/11.0/rpm/ppc/dhcp-devel-3.0.6-86.4.ppc.r... http://download.opensuse.org/update/11.0/rpm/ppc/dhcp-relay-3.0.6-86.4.ppc.r... http://download.opensuse.org/update/11.0/rpm/ppc/dhcp-server-3.0.6-86.4.ppc.... openSUSE 10.3: http://download.opensuse.org/update/10.3/rpm/ppc/dhcp-3.0.6-24.4.ppc.rpm http://download.opensuse.org/update/10.3/rpm/ppc/dhcp-client-3.0.6-24.4.ppc.... http://download.opensuse.org/update/10.3/rpm/ppc/dhcp-devel-3.0.6-24.4.ppc.r... http://download.opensuse.org/update/10.3/rpm/ppc/dhcp-relay-3.0.6-24.4.ppc.r... http://download.opensuse.org/update/10.3/rpm/ppc/dhcp-server-3.0.6-24.4.ppc.... x86-64 Platform: openSUSE 11.1: http://download.opensuse.org/debug/update/11.1/rpm/x86_64/dhcp-debuginfo-3.1... http://download.opensuse.org/debug/update/11.1/rpm/x86_64/dhcp-debugsource-3... http://download.opensuse.org/update/11.1/rpm/x86_64/dhcp-3.1.1-6.5.1.x86_64.... http://download.opensuse.org/update/11.1/rpm/x86_64/dhcp-client-3.1.1-6.5.1.... http://download.opensuse.org/update/11.1/rpm/x86_64/dhcp-devel-3.1.1-6.5.1.x... http://download.opensuse.org/update/11.1/rpm/x86_64/dhcp-relay-3.1.1-6.5.1.x... http://download.opensuse.org/update/11.1/rpm/x86_64/dhcp-server-3.1.1-6.5.1.... openSUSE 11.0: http://download.opensuse.org/debug/update/11.0/rpm/x86_64/dhcp-debuginfo-3.0... http://download.opensuse.org/debug/update/11.0/rpm/x86_64/dhcp-debugsource-3... http://download.opensuse.org/update/11.0/rpm/x86_64/dhcp-3.0.6-86.4.x86_64.r... http://download.opensuse.org/update/11.0/rpm/x86_64/dhcp-client-3.0.6-86.4.x... http://download.opensuse.org/update/11.0/rpm/x86_64/dhcp-devel-3.0.6-86.4.x8... http://download.opensuse.org/update/11.0/rpm/x86_64/dhcp-relay-3.0.6-86.4.x8... http://download.opensuse.org/update/11.0/rpm/x86_64/dhcp-server-3.0.6-86.4.x... openSUSE 10.3: http://download.opensuse.org/update/10.3/rpm/x86_64/dhcp-3.0.6-24.4.x86_64.r... http://download.opensuse.org/update/10.3/rpm/x86_64/dhcp-client-3.0.6-24.4.x... http://download.opensuse.org/update/10.3/rpm/x86_64/dhcp-devel-3.0.6-24.4.x8... http://download.opensuse.org/update/10.3/rpm/x86_64/dhcp-relay-3.0.6-24.4.x8... http://download.opensuse.org/update/10.3/rpm/x86_64/dhcp-server-3.0.6-24.4.x... Sources: openSUSE 11.1: http://download.opensuse.org/update/11.1/rpm/src/dhcp-3.1.1-6.5.1.src.rpm openSUSE 11.0: http://download.opensuse.org/update/11.0/rpm/src/dhcp-3.0.6-86.4.src.rpm openSUSE 10.3: http://download.opensuse.org/update/10.3/rpm/src/dhcp-3.0.6-24.4.src.rpm Our maintenance customers are notified individually. The packages are offered for installation from the maintenance web: Open Enterprise Server http://download.novell.com/index.jsp?search=Search&keywords=ecae7b6a88e669baec4b55c8fb8d3b1c Novell Linux POS 9 http://download.novell.com/index.jsp?search=Search&keywords=ecae7b6a88e669baec4b55c8fb8d3b1c Novell Linux Desktop 9 http://download.novell.com/index.jsp?search=Search&keywords=ecae7b6a88e669baec4b55c8fb8d3b1c SUSE SLES 9 http://download.novell.com/index.jsp?search=Search&keywords=ecae7b6a88e669baec4b55c8fb8d3b1c SUSE Linux Enterprise Server 10 SP2 http://download.novell.com/index.jsp?search=Search&keywords=f8ba1c87c9b632aae917daaa99ff7563 SLE SDK 10 SP2 http://download.novell.com/index.jsp?search=Search&keywords=f8ba1c87c9b632aae917daaa99ff7563 SUSE Linux Enterprise 10 SP2 DEBUGINFO http://download.novell.com/index.jsp?search=Search&keywords=f8ba1c87c9b632aae917daaa99ff7563 SUSE Linux Enterprise Desktop 10 SP2 http://download.novell.com/index.jsp?search=Search&keywords=f8ba1c87c9b632aae917daaa99ff7563 SLES 11 http://download.novell.com/index.jsp?search=Search&keywords=8344cd148acb6a76268d2b1462cf9a03 SLED 11 http://download.novell.com/index.jsp?search=Search&keywords=8344cd148acb6a76268d2b1462cf9a03 SLES 11 DEBUGINFO http://download.novell.com/index.jsp?search=Search&keywords=8344cd148acb6a76268d2b1462cf9a03 ______________________________________________________________________________ 5) Pending Vulnerabilities, Solutions, and Work-Arounds: - ruby - insufficient return value checks for openssl function OCSP_basic_verify() (CVE-2009-0642) allowed attackers to use revoked certificates. - the entropy of DNS identifiers was increased to avoid spoofing attacks (CVE-2008-3905). - The code for parsing XML data was vulnerable to a denial of service bug (CVE-2008-3790). - An attack on algorithm complexity was possible in function WEBrick::HTTP::DefaultFileHandler() while parsing HTTP requests (CVE-2008-3656) as well as by using the regex engine (CVE-2008-3443) causing high CPU load. - Ruby's access restriction code (CVE-2008-3655) as well as safe-level handling using function DL.dlopen() (CVE-2008-3657) and big decimal handling (CVE-2009-1904) was improved. Affected Products: SLES9, SLES10, SLES11, openSUSE 10.3-11.1 - samba - smbclient was prone to a format string vulnerability (CVE-2009-1886) - file ACLs could potentially be bypassed when DOS filemode was enabled (CVE-2009-1888). Affected Products: SLES10, SLES11, openSUSE 10.3-11.1 - libpng libpng did not properly parse 1-bit interlaced images. Attackers could potentially use this to read portions of memory (CVE-2009-2042). Affected Products: SLES9, SLES10, SLES11, openSUSE 10.3-11.1 ______________________________________________________________________________ 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. 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. - SUSE runs two security mailing lists to which any interested party may subscribe: opensuse-security@opensuse.org - General Linux and SUSE security discussion. All SUSE security announcements are sent to this list. To subscribe, send an e-mail to <opensuse-security+subscribe@opensuse.org>. opensuse-security-announce@opensuse.org - SUSE's announce-only mailing list. Only SUSE's security announcements are sent to this list. To subscribe, send an e-mail to <opensuse-security-announce+subscribe@opensuse.org>. ===================================================================== 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. 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