[security-announce] SUSE Security Announcement: Linux kernel (SUSE-SA:2011:031)
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ______________________________________________________________________________ SUSE Security Announcement Package: kernel Announcement ID: SUSE-SA:2011:031 Date: Mon, 25 Jul 2011 12:00:00 +0000 Affected Products: SUSE Linux Enterprise High Availability Extension 11 SP1 SUSE Linux Enterprise Desktop 11 SP1 SUSE Linux Enterprise Server 11 SP1 Vulnerability Type: remote denial of service, potential local privilege escalation CVSS v2 Base Score: 7.2 (AV:L/AC:L/Au:N/C:C/I:C/A:C) SUSE Default Package: yes Cross-References: CVE-2011-1012, CVE-2011-1017, CVE-2011-1020 CVE-2011-1078, CVE-2011-1079, CVE-2011-1080 CVE-2011-1160, CVE-2011-1170, CVE-2011-1171 CVE-2011-1172, CVE-2011-1173, CVE-2011-1577 CVE-2011-1585, CVE-2011-1593, CVE-2011-1598 CVE-2011-1745, CVE-2011-1746, CVE-2011-1748 CVE-2011-2182, CVE-2011-2183, CVE-2011-2213 CVE-2011-2491, CVE-2011-2496, CVE-2011-2517 Content of This Advisory: 1) Security Vulnerability Resolved: Linux kernel security update 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 The SUSE Linux Enterprise 11 Service Pack 1 kernel was updated to 2.6.32.43 and fixes various bugs and security issues. Following security issues were fixed: CVE-2011-2496: The normal mmap paths all avoid creating a mapping where the pgoff inside the mapping could wrap around due to overflow. However, an expanding mremap() can take such a non-wrapping mapping and make it bigger and cause a wrapping condition. CVE-2011-2491: A local unprivileged user able to access a NFS filesystem could use file locking to deadlock parts of an nfs server under some circumstance. CVE-2011-2183: Fixed a race between ksmd and other memory management code, which could result in a NULL ptr dereference and kernel crash. CVE-2011-2517: In both trigger_scan and sched_scan operations, we were checking for the SSID length before assigning the value correctly. Since the memory was just kzalloced, the check was always failing and SSID with over 32 characters were allowed to go through. This required CAP_NET_ADMIN privileges to be exploited. CVE-2011-2213: A malicious user or buggy application could inject diagnosing byte code and trigger an infinite loop in inet_diag_bc_audit(). CVE-2011-1017,CVE-2011-1012,CVE-2011-2182: The code for evaluating LDM partitions (in fs/partitions/ldm.c) contained bugs that could crash the kernel for certain corrupted LDM partitions. CVE-2011-1593: Multiple integer overflows in the next_pidmap function in kernel/pid.c in the Linux kernel allowed local users to cause a denial of service (system crash) via a crafted (1) getdents or (2) readdir system call. CVE-2011-1020: The proc filesystem implementation in the Linux kernel did not restrict access to the /proc directory tree of a process after this process performs an exec of a setuid program, which allowed local users to obtain sensitive information or cause a denial of service via open, lseek, read, and write system calls. CVE-2011-1585: When using a setuid root mount.cifs, local users could hijack password protected mounted CIFS shares of other local users. CVE-2011-1160: Kernel information via the TPM devices could by used by local attackers to read kernel memory. CVE-2011-1577: The Linux kernel automatically evaluated partition tables of storage devices. The code for evaluating EFI GUID partitions (in fs/partitions/efi.c) contained a bug that causes a kernel oops on certain corrupted GUID partition tables, which might be used by local attackers to crash the kernel or potentially execute code. CVE-2011-1078: In a bluetooth ioctl, struct sco_conninfo has one padding byte in the end. Local variable cinfo of type sco_conninfo was copied to userspace with this uninitialized one byte, leading to an old stack contents leak. CVE-2011-1079: In a bluetooth ioctl, struct ca is copied from userspace. It was not checked whether the "device" field was NULL terminated. This potentially leads to BUG() inside of alloc_netdev_mqs() and/or information leak by creating a device with a name made of contents of kernel stack. CVE-2011-1080: In ebtables rule loading, struct tmp is copied from userspace. It was not checked whether the "name" field is NULL terminated. This may have lead to buffer overflow and passing contents of kernel stack as a module name to try_then_request_module() and, consequently, to modprobe commandline. It would be seen by all userspace processes. CVE-2011-1173: The econet_sendmsg function in net/econet/af_econet.c in the Linux kernel on the x86_64 platform allowed remote attackers to obtain potentially sensitive information from kernel stack memory by reading uninitialized data in the ah field of an Acorn Universal Networking (AUN) packet. CVE-2011-1170: net/ipv4/netfilter/arp_tables.c in the IPv4 implementation in the Linux kernel did not place the expected '0' character at the end of string data in the values of certain structure members, which allowed local users to obtain potentially sensitive information from kernel memory by leveraging the CAP_NET_ADMIN capability to issue a crafted request, and then reading the argument to the resulting modprobe process. CVE-2011-1171: net/ipv4/netfilter/ip_tables.c in the IPv4 implementation in the Linux kernel did not place the expected '0' character at the end of string data in the values of certain structure members, which allowed local users to obtain potentially sensitive information from kernel memory by leveraging the CAP_NET_ADMIN capability to issue a crafted request, and then reading the argument to the resulting modprobe process. CVE-2011-1172: net/ipv6/netfilter/ip6_tables.c in the IPv6 implementation in the Linux kernel did not place the expected '0' character at the end of string data in the values of certain structure members, which allowed local users to obtain potentially sensitive information from kernel memory by leveraging the CAP_NET_ADMIN capability to issue a crafted request, and then reading the argument to the resulting modprobe process. CVE-2011-1746: Multiple integer overflows in the (1) agp_allocate_memory and (2) agp_create_user_memory functions in drivers/char/agp/generic.c in the Linux kernel before allowed local users to trigger buffer overflows, and consequently cause a denial of service (system crash) or possibly have unspecified other impact, via vectors related to calls that specify a large number of memory pages. CVE-2011-1745: Integer overflow in the agp_generic_insert_memory function in drivers/char/agp/generic.c in the Linux kernel allowed local users to gain privileges or cause a denial of service (system crash) via a crafted AGPIOC_BIND agp_ioctl ioctl call. CVE-2011-1598: The bcm_release function in net/can/bcm.c in the Linux kernel did not properly validate a socket data structure, which allowed local users to cause a denial of service (NULL pointer dereference) or possibly have unspecified other impact via a crafted release operation. CVE-2011-1748: The raw_release function in net/can/raw.c in the Linux kernel did not properly validate a socket data structure, which allows local users to cause a denial of service (NULL pointer dereference) or possibly have unspecified other impact via a crafted release operation. 2) Solution or Work-Around There is no known workaround, please install the update packages. 3) Special Instructions and Notes Please reboot the machine after installing the update. 4) Package Location and Checksums The preferred method for installing security updates is to use the YaST "Online Update" module or the "zypper" commandline tool. The package and patch management stack will detect which updates are required and automatically perform 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. Our maintenance customers are notified individually. The packages are offered for installation from the maintenance web: SUSE Linux Enterprise High Availability Extension 11 SP1 http://download.novell.com/patch/finder/?keywords=318b8dd82438317a3b490cab81... http://download.novell.com/patch/finder/?keywords=ab6bc73efff4bb12a70b6df584... http://download.novell.com/patch/finder/?keywords=a6c7e8b67f942c75a3f7e6e766... http://download.novell.com/patch/finder/?keywords=fa5f3b489f8749e53517f26793... http://download.novell.com/patch/finder/?keywords=5d69352e58309ed0c7848b758f... SUSE Linux Enterprise Desktop 11 SP1 http://download.novell.com/patch/finder/?keywords=318b8dd82438317a3b490cab81... http://download.novell.com/patch/finder/?keywords=5d69352e58309ed0c7848b758f... SUSE Linux Enterprise Server 11 SP1 http://download.novell.com/patch/finder/?keywords=318b8dd82438317a3b490cab81... http://download.novell.com/patch/finder/?keywords=ab6bc73efff4bb12a70b6df584... http://download.novell.com/patch/finder/?keywords=a6c7e8b67f942c75a3f7e6e766... http://download.novell.com/patch/finder/?keywords=fa5f3b489f8749e53517f26793... http://download.novell.com/patch/finder/?keywords=5d69352e58309ed0c7848b758f... ______________________________________________________________________________ 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. 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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Marcus Meissner