SB2014103103 - Fedora 21 update for kernel
Published: October 31, 2014 Updated: April 24, 2025
Breakdown by Severity
- Low
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- Critical
Description
This security bulletin contains information about 10 secuirty vulnerabilities.
1) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2014-3646)
The vulnerability allows a remote non-authenticated attacker to perform service disruption.
arch/x86/kvm/vmx.c in the KVM subsystem in the Linux kernel through 3.17.2 does not have an exit handler for the INVVPID instruction, which allows guest OS users to cause a denial of service (guest OS crash) via a crafted application.
2) Race condition (CVE-ID: CVE-2014-3611)
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
Race condition in the __kvm_migrate_pit_timer function in arch/x86/kvm/i8254.c in the KVM subsystem in the Linux kernel through 3.17.2 allows guest OS users to cause a denial of service (host OS crash) by leveraging incorrect PIT emulation.
3) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2014-3610)
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
The WRMSR processing functionality in the KVM subsystem in the Linux kernel through 3.17.2 does not properly handle the writing of a non-canonical address to a model-specific register, which allows guest OS users to cause a denial of service (host OS crash) by leveraging guest OS privileges, related to the wrmsr_interception function in arch/x86/kvm/svm.c and the handle_wrmsr function in arch/x86/kvm/vmx.c.
4) Resource management error (CVE-ID: CVE-2014-3673)
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
The SCTP implementation in the Linux kernel through 3.17.2 allows remote attackers to cause a denial of service (system crash) via a malformed ASCONF chunk, related to net/sctp/sm_make_chunk.c and net/sctp/sm_statefuns.c.
5) Resource management error (CVE-ID: CVE-2014-3690)
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
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.
6) Resource management error (CVE-ID: CVE-2014-3687)
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
The sctp_assoc_lookup_asconf_ack function in net/sctp/associola.c in the SCTP implementation in the Linux kernel through 3.17.2 allows remote attackers to cause a denial of service (panic) via duplicate ASCONF chunks that trigger an incorrect uncork within the side-effect interpreter.
7) Resource management error (CVE-ID: CVE-2014-3688)
The vulnerability allows a remote non-authenticated attacker to perform service disruption.
The SCTP implementation in the Linux kernel before 3.17.4 allows remote attackers to cause a denial of service (memory consumption) by triggering a large number of chunks in an association's output queue, as demonstrated by ASCONF probes, related to net/sctp/inqueue.c and net/sctp/sm_statefuns.c.
8) Input validation error (CVE-ID: CVE-2014-8369)
The vulnerability allows a remote non-authenticated attacker to read and manipulate data.
The kvm_iommu_map_pages function in virt/kvm/iommu.c in the Linux kernel through 3.17.2 miscalculates the number of pages during the handling of a mapping failure, which allows guest OS users to cause a denial of service (host OS page unpinning) or possibly have unspecified other impact by leveraging guest OS privileges. NOTE: this vulnerability exists because of an incorrect fix for CVE-2014-3601.
9) NULL pointer dereference (CVE-ID: CVE-2014-8480)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the I() function in arch/x86/kvm/emulate.c. A local user can perform a denial of service (DoS) attack.
10) NULL pointer dereference (CVE-ID: CVE-2014-8481)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the decode_operand() function in arch/x86/kvm/emulate.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.