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CVE-2014-8989

Status Candidate

Overview

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.

Related Files

Mandriva Linux Security Advisory 2015-058
Posted Mar 13, 2015
Authored by Mandriva | Site mandriva.com

Mandriva Linux Security Advisory 2015-058 - 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. 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 by leveraging /dev/kvm access, as demonstrated by PR_SET_TSC prctl calls within a modified copy of QEMU. Various other issues have also been addressed. The updated packages provides a solution for these security issues.

tags | advisory, denial of service, arbitrary, x86, kernel, local, cryptography, vulnerability
systems | linux, mandriva
advisories | CVE-2013-7421, CVE-2014-3690, CVE-2014-8133, CVE-2014-8160, CVE-2014-8989, CVE-2014-9419, CVE-2014-9420, CVE-2014-9428, CVE-2014-9529, CVE-2014-9584, CVE-2014-9585, CVE-2014-9644, CVE-2014-9683, CVE-2015-0239
SHA-256 | 9e3286645b07ba09497f299f4db502238c2d94c89713da2d000ee34aeb276a28
Ubuntu Security Notice USN-2515-2
Posted Mar 5, 2015
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2515-2 - USN-2515-1 fixed vulnerabilities in the Linux kernel. There was an unrelated regression in the use of the virtual counter (CNTVCT) on arm64 architectures. This update fixes the problem. A flaw was discovered in the Kernel Virtual Machine's (KVM) emulation of the SYSTENTER instruction when the guest OS does not initialize the SYSENTER MSRs. A guest OS user could exploit this flaw to cause a denial of service of the guest OS (crash) or potentially gain privileges on the guest OS. Various other issues were also addressed.

tags | advisory, denial of service, kernel, vulnerability
systems | linux, ubuntu
advisories | CVE-2014-8133, CVE-2014-8160, CVE-2014-8559, CVE-2014-8989, CVE-2014-9419, CVE-2014-9420, CVE-2014-9428, CVE-2014-9529, CVE-2014-9584, CVE-2014-9585, CVE-2014-9683, CVE-2015-0239
SHA-256 | 53baab56a79fe3971010064b4cef9abd6fb13fe2a27a242cc2c2dba794d3df3a
Ubuntu Security Notice USN-2516-3
Posted Mar 4, 2015
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2516-3 - USN-2516-1 fixed vulnerabilities in the Linux kernel, and the fix in USN-2516-2 was incomplete. There was an unrelated regression in the use of the virtual counter (CNTVCT) on arm64 architectures. This update fixes the problem. Various other issues were also addressed.

tags | advisory, kernel, vulnerability
systems | linux, ubuntu
advisories | CVE-2014-8133, CVE-2014-8160, CVE-2014-8559, CVE-2014-8989, CVE-2014-9419, CVE-2014-9420, CVE-2014-9428, CVE-2014-9529, CVE-2014-9584, CVE-2014-9585, CVE-2014-9683, CVE-2015-0239
SHA-256 | 1a88ef9adcc3ea7c2604f0479fa1730a550192db416be0a49b7d6ed0f176098a
Ubuntu Security Notice USN-2516-2
Posted Mar 2, 2015
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2516-2 - USN-2516-1 fixed vulnerabilities in the Linux kernel. There was an unrelated regression in the use of the virtual counter (CNTVCT) on arm64 architectures. This update fixes the problem. A flaw was discovered in the Kernel Virtual Machine's (KVM) emulation of the SYSTENTER instruction when the guest OS does not initialize the SYSENTER MSRs. A guest OS user could exploit this flaw to cause a denial of service of the guest OS (crash) or potentially gain privileges on the guest OS. Various other issues were also addressed.

tags | advisory, denial of service, kernel, vulnerability
systems | linux, ubuntu
advisories | CVE-2014-8133, CVE-2014-8160, CVE-2014-8559, CVE-2014-8989, CVE-2014-9419, CVE-2014-9420, CVE-2014-9428, CVE-2014-9529, CVE-2014-9584, CVE-2014-9585, CVE-2014-9683, CVE-2015-0239
SHA-256 | 76903f6b56698c4952e01e1d34693ec01de15214367c1003f5d4153b94ec442f
Ubuntu Security Notice USN-2518-1
Posted Feb 26, 2015
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2518-1 - A flaw was discovered in the Kernel Virtual Machine's (KVM) emulation of the SYSTENTER instruction when the guest OS does not initialize the SYSENTER MSRs. A guest OS user could exploit this flaw to cause a denial of service of the guest OS (crash) or potentially gain privileges on the guest OS. Andy Lutomirski discovered an information leak in the Linux kernel's Thread Local Storage (TLS) implementation allowing users to bypass the espfix to obtain information that could be used to bypass the Address Space Layout Randomization (ASLR) protection mechanism. A local user could exploit this flaw to obtain potentially sensitive information from kernel memory. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2014-8133, CVE-2014-8160, CVE-2014-8559, CVE-2014-8989, CVE-2014-9419, CVE-2014-9420, CVE-2014-9428, CVE-2014-9529, CVE-2014-9584, CVE-2014-9585, CVE-2014-9683, CVE-2015-0239
SHA-256 | 03584d0fcffadd6ca49b1e56d0b3d7d9ae8c678d2a96002a23311b725d15ff9a
Ubuntu Security Notice USN-2517-1
Posted Feb 26, 2015
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2517-1 - A flaw was discovered in the Kernel Virtual Machine's (KVM) emulation of the SYSTENTER instruction when the guest OS does not initialize the SYSENTER MSRs. A guest OS user could exploit this flaw to cause a denial of service of the guest OS (crash) or potentially gain privileges on the guest OS. Andy Lutomirski discovered an information leak in the Linux kernel's Thread Local Storage (TLS) implementation allowing users to bypass the espfix to obtain information that could be used to bypass the Address Space Layout Randomization (ASLR) protection mechanism. A local user could exploit this flaw to obtain potentially sensitive information from kernel memory. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2014-8133, CVE-2014-8160, CVE-2014-8559, CVE-2014-8989, CVE-2014-9419, CVE-2014-9420, CVE-2014-9428, CVE-2014-9529, CVE-2014-9584, CVE-2014-9585, CVE-2014-9683, CVE-2015-0239
SHA-256 | c2beb8818a02fe1fe50f205d50c8a8c8098205e9d6db7cb024d6c2c259ec35f5
Ubuntu Security Notice USN-2516-1
Posted Feb 26, 2015
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2516-1 - A flaw was discovered in the Kernel Virtual Machine's (KVM) emulation of the SYSTENTER instruction when the guest OS does not initialize the SYSENTER MSRs. A guest OS user could exploit this flaw to cause a denial of service of the guest OS (crash) or potentially gain privileges on the guest OS. Andy Lutomirski discovered an information leak in the Linux kernel's Thread Local Storage (TLS) implementation allowing users to bypass the espfix to obtain information that could be used to bypass the Address Space Layout Randomization (ASLR) protection mechanism. A local user could exploit this flaw to obtain potentially sensitive information from kernel memory. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2014-8133, CVE-2014-8160, CVE-2014-8559, CVE-2014-8989, CVE-2014-9419, CVE-2014-9420, CVE-2014-9428, CVE-2014-9529, CVE-2014-9584, CVE-2014-9585, CVE-2014-9683, CVE-2015-0239
SHA-256 | 867c10eb1c46d3dd5d476bf47cf8c230ef2d51da96ccd2b529ad846c96b4791b
Ubuntu Security Notice USN-2515-1
Posted Feb 26, 2015
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2515-1 - A flaw was discovered in the Kernel Virtual Machine's (KVM) emulation of the SYSTENTER instruction when the guest OS does not initialize the SYSENTER MSRs. A guest OS user could exploit this flaw to cause a denial of service of the guest OS (crash) or potentially gain privileges on the guest OS. Andy Lutomirski discovered an information leak in the Linux kernel's Thread Local Storage (TLS) implementation allowing users to bypass the espfix to obtain information that could be used to bypass the Address Space Layout Randomization (ASLR) protection mechanism. A local user could exploit this flaw to obtain potentially sensitive information from kernel memory. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2014-8133, CVE-2014-8160, CVE-2014-8559, CVE-2014-8989, CVE-2014-9419, CVE-2014-9420, CVE-2014-9428, CVE-2014-9529, CVE-2014-9584, CVE-2014-9585, CVE-2014-9683, CVE-2015-0239
SHA-256 | 689a6f122c96b236c5a992bb616f2e866816f6de37648ac2056305f5cc906c16
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