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Mandriva Linux Security Advisory MDVSA-2015:058
http://www.mandriva.com/en/support/security/
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Package : kernel
Date : March 13, 2015
Affected: Business Server 2.0
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Problem Description:

Multiple vulnerabilities has been found and corrected in the Linux
kernel:

The Crypto API in the Linux kernel before 3.18.5 allows local users
to load arbitrary kernel modules via a bind system call for an
AF_ALG socket with a module name in the salg_name field, a different
vulnerability than CVE-2014-9644 (CVE-2013-7421).

arch/x86/kvm/vmx.c in the KVM subsystem in the Linux kernel before
3.17.2 on Intel processors does not ensure that the value in the CR4
control register remains the same after a VM entry, which allows host
OS users to kill arbitrary processes or cause a denial of service
(system disruption) by leveraging /dev/kvm access, as demonstrated by
PR_SET_TSC prctl calls within a modified copy of QEMU (CVE-2014-3690).

arch/x86/kernel/tls.c in the Thread Local Storage (TLS) implementation
in the Linux kernel through 3.18.1 allows local users to bypass the
espfix protection mechanism, and consequently makes it easier for
local users to bypass the ASLR protection mechanism, via a crafted
application that makes a set_thread_area system call and later reads
a 16-bit value (CVE-2014-8133).

net/netfilter/nf_conntrack_proto_generic.c in the Linux kernel before
3.18 generates incorrect conntrack entries during handling of certain
iptables rule sets for the SCTP, DCCP, GRE, and UDP-Lite protocols,
which allows remote attackers to bypass intended access restrictions
via packets with disallowed port numbers (CVE-2014-8160).

The Linux kernel through 3.17.4 does not properly restrict dropping
of supplemental group memberships in certain namespace scenarios,
which allows local users to bypass intended file permissions by
leveraging a POSIX ACL containing an entry for the group category
that is more restrictive than the entry for the other category, aka
a negative groups issue, related to kernel/groups.c, kernel/uid16.c,
and kernel/user_namespace.c (CVE-2014-8989).

The __switch_to function in arch/x86/kernel/process_64.c in the Linux
kernel through 3.18.1 does not ensure that Thread Local Storage (TLS)
descriptors are loaded before proceeding with other steps, which makes
it easier for local users to bypass the ASLR protection mechanism via
a crafted application that reads a TLS base address (CVE-2014-9419).

The rock_continue function in fs/isofs/rock.c in the Linux kernel
through 3.18.1 does not restrict the number of Rock Ridge continuation
entries, which allows local users to cause a denial of service
(infinite loop, and system crash or hang) via a crafted iso9660 image
(CVE-2014-9420).

The batadv_frag_merge_packets function in
net/batman-adv/fragmentation.c in the B.A.T.M.A.N. implementation in
the Linux kernel through 3.18.1 uses an incorrect length field during
a calculation of an amount of memory, which allows remote attackers
to cause a denial of service (mesh-node system crash) via fragmented
packets (CVE-2014-9428).

Race condition in the key_gc_unused_keys function in security/keys/gc.c
in the Linux kernel through 3.18.2 allows local users to cause a denial
of service (memory corruption or panic) or possibly have unspecified
other impact via keyctl commands that trigger access to a key structure
member during garbage collection of a key (CVE-2014-9529).

The parse_rock_ridge_inode_internal function in fs/isofs/rock.c in
the Linux kernel before 3.18.2 does not validate a length value in
the Extensions Reference (ER) System Use Field, which allows local
users to obtain sensitive information from kernel memory via a crafted
iso9660 image (CVE-2014-9584).

The vdso_addr function in arch/x86/vdso/vma.c in the Linux kernel
through 3.18.2 does not properly choose memory locations for the
vDSO area, which makes it easier for local users to bypass the ASLR
protection mechanism by guessing a location at the end of a PMD
(CVE-2014-9585).

The Crypto API in the Linux kernel before 3.18.5 allows local users
to load arbitrary kernel modules via a bind system call for an
AF_ALG socket with a parenthesized module template expression in
the salg_name field, as demonstrated by the vfat(aes) expression,
a different vulnerability than CVE-2013-7421 (CVE-2014-9644).

Off-by-one error in the ecryptfs_decode_from_filename function in
fs/ecryptfs/crypto.c in the eCryptfs subsystem in the Linux kernel
before 3.18.2 allows local users to cause a denial of service (buffer
overflow and system crash) or possibly gain privileges via a crafted
filename (CVE-2014-9683).

The em_sysenter function in arch/x86/kvm/emulate.c in the Linux kernel
before 3.18.5, when the guest OS lacks SYSENTER MSR initialization,
allows guest OS users to gain guest OS privileges or cause a denial
of service (guest OS crash) by triggering use of a 16-bit code segment
for emulation of a SYSENTER instruction (CVE-2015-0239).

The updated packages provides a solution for these security issues.
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References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-7421
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3690
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-8133
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-8160
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-8989
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-9419
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-9420
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-9428
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-9529
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-9584
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-9585
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-9644
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-9683
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0239
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Updated Packages:

Mandriva Business Server 2/X86_64:
6f306fb57ce3b3ad55f8943360dfec98 mbs2/x86_64/cpupower-3.14.34-1.1.mbs2.x86_64.rpm
f84a132ab6b669eba658d4815b1c521e mbs2/x86_64/kernel-firmware-3.14.34-1.1.mbs2.noarch.rpm
2e4ea08bde452e5cb230a192c1e47af1 mbs2/x86_64/kernel-headers-3.14.34-1.1.mbs2.x86_64.rpm
eeabfc7de3b9ece90ea619a40d87528d mbs2/x86_64/kernel-server-3.14.34-1.1.mbs2.x86_64.rpm
94f51895d2f3079f26aa219772afcbda mbs2/x86_64/kernel-server-devel-3.14.34-1.1.mbs2.x86_64.rpm
857731401242a159adde6fe99fd293a6 mbs2/x86_64/kernel-source-3.14.34-1.mbs2.noarch.rpm
c757d5a1fbffcb41b577bba95facbba9 mbs2/x86_64/lib64cpupower0-3.14.34-1.1.mbs2.x86_64.rpm
70583be267db270c5d9db94f69f57979 mbs2/x86_64/lib64cpupower-devel-3.14.34-1.1.mbs2.x86_64.rpm
9eb5f24206ca5ed51b205d249677965e mbs2/SRPMS/cpupower-3.14.34-1.1.mbs2.src.rpm
092a138adebd64f55378936b50226b5f mbs2/SRPMS/kernel-firmware-3.14.34-1.1.mbs2.src.rpm
73c3623ee71e43be06060a252b1a10f9 mbs2/SRPMS/kernel-headers-3.14.34-1.1.mbs2.src.rpm
9a0711a815ca145365c4a4a2867e6319 mbs2/SRPMS/kernel-server-3.14.34-1.1.mbs2.src.rpm
acc64f8fceda5de2e8cbfb4c19c946c6 mbs2/SRPMS/kernel-source-3.14.34-1.mbs2.src.rpm
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To upgrade automatically use MandrivaUpdate or urpmi. The verification
of md5 checksums and GPG signatures is performed automatically for you.

All packages are signed by Mandriva for security. You can obtain the
GPG public key of the Mandriva Security Team by executing:

gpg –recv-keys –keyserver pgp.mit.edu 0x22458A98

You can view other update advisories for Mandriva Linux at:

http://www.mandriva.com/en/support/security/advisories/

If you want to report vulnerabilities, please contact

security_(at)_mandriva.com
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Type Bits/KeyID Date User ID
pub 1024D/22458A98 2000-07-10 Mandriva Security Team
<security*mandriva.com>
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