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CVE-2012-2123

Status Candidate

Overview

CVE-2012-2123 kernel: fcaps: clear the same personality flags as suid when fcaps are used

Related Files

Ubuntu Security Notice USN-1530-1
Posted Aug 13, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1530-1 - Andy Adamson discovered a flaw in the Linux kernel's NFSv4 implementation. A remote NFS server (attacker) could exploit this flaw to cause a denial of service. Steve Grubb reported a flaw with Linux fscaps (file system base capabilities) when used to increase the permissions of a process. For application on which fscaps are in use a local attacker can disable address space randomization to make attacking the process with raised privileges easier. Various other issues were also addressed.

tags | advisory, remote, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2011-4131, CVE-2012-2123, CVE-2012-2136, CVE-2012-2313, CVE-2012-2319, CVE-2012-2372, CVE-2012-2375, CVE-2011-4131, CVE-2012-2123, CVE-2012-2136, CVE-2012-2313, CVE-2012-2319, CVE-2012-2372, CVE-2012-2375
SHA-256 | 1182d44ab2f37a093d4b3adc952b3b7cbf5002be8d366863ba89dea8ab42ea57
Red Hat Security Advisory 2012-0743-01
Posted Jun 18, 2012
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2012-0743-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. A local, unprivileged user could use an integer overflow flaw in drm_mode_dirtyfb_ioctl() to cause a denial of service or escalate their privileges. A buffer overflow flaw was found in the macvtap device driver, used for creating a bridged network between the guest and the host in KVM environments. A privileged guest user in a KVM guest could use this flaw to crash the host. Note: This issue only affected hosts that have the vhost_net module loaded with the experimental_zcopytx module option enabled, and that also have macvtap configured for at least one guest.

tags | advisory, denial of service, overflow, kernel, local
systems | linux, redhat
advisories | CVE-2012-0044, CVE-2012-1179, CVE-2012-2119, CVE-2012-2121, CVE-2012-2123, CVE-2012-2136, CVE-2012-2137, CVE-2012-2372, CVE-2012-2373
SHA-256 | 2480f3d6a1b6962283dd9e04ff5f1211daab9bed3388bb442c0b82afde24b21d
Ubuntu Security Notice USN-1470-1
Posted Jun 12, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1470-1 - Andy Adamson discovered a flaw in the Linux kernel's NFSv4 implementation. A remote NFS server (attacker) could exploit this flaw to cause a denial of service. A flaw was found in the Linux kernel's KVM (Kernel Virtual Machine) virtual cpu setup. An unprivileged local user could exploit this flaw to crash the system leading to a denial of service. A flaw was discovered in the Linux kernel's KVM (kernel virtual machine). An administrative user in the guest OS could leverage this flaw to cause a denial of service in the host OS. Various other issues were also addressed.

tags | advisory, remote, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2011-4131, CVE-2012-1601, CVE-2012-2121, CVE-2012-2123, CVE-2012-2133, CVE-2011-4131, CVE-2012-1601, CVE-2012-2121, CVE-2012-2123, CVE-2012-2133
SHA-256 | fe6b359af2c687cda0fce023e8e9c9304bee201b1d57cb22fcf7188bb397c2c7
Ubuntu Security Notice USN-1460-1
Posted Jun 1, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1460-1 - A flaw was found in the Linux kernel's KVM (Kernel Virtual Machine) virtual cpu setup. An unprivileged local user could exploit this flaw to crash the system leading to a denial of service. Steve Grubb reported a flaw with Linux fscaps (file system base capabilities) when used to increase the permissions of a process. For application on which fscaps are in use a local attacker can disable address space randomization to make attacking the process with raised privileges easier. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2012-1601, CVE-2012-2123, CVE-2012-1601, CVE-2012-2123
SHA-256 | 5eed4e806cfbd1046a574babd6b104c4b5b1de172cca928a8a7b6e71e6fdff02
Ubuntu Security Notice USN-1459-1
Posted Jun 1, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1459-1 - A flaw was found in the Linux kernel's KVM (Kernel Virtual Machine) virtual cpu setup. An unprivileged local user could exploit this flaw to crash the system leading to a denial of service. Steve Grubb reported a flaw with Linux fscaps (file system base capabilities) when used to increase the permissions of a process. For application on which fscaps are in use a local attacker can disable address space randomization to make attacking the process with raised privileges easier. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2012-1601, CVE-2012-2123, CVE-2012-1601, CVE-2012-2123
SHA-256 | f8953400254cf2783ba9b51d78b1cd00882b5fa235d26b059d3de43dfc27c4ad
Ubuntu Security Notice USN-1457-1
Posted Jun 1, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1457-1 - Andy Adamson discovered a flaw in the Linux kernel's NFSv4 implementation. A remote NFS server (attacker) could exploit this flaw to cause a denial of service. A flaw was found in the Linux kernel's KVM (Kernel Virtual Machine) virtual cpu setup. An unprivileged local user could exploit this flaw to crash the system leading to a denial of service. A flaw was discovered in the Linux kernel's KVM (kernel virtual machine). An administrative user in the guest OS could leverage this flaw to cause a denial of service in the host OS. Various other issues were also addressed.

tags | advisory, remote, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2011-4131, CVE-2012-1601, CVE-2012-2121, CVE-2012-2123, CVE-2012-2133, CVE-2011-4131, CVE-2012-1601, CVE-2012-2121, CVE-2012-2123, CVE-2012-2133
SHA-256 | 649c25f1d00b47ba22234b57faaf20821809ce2e942e784a0f40d1efe1ac41dc
Ubuntu Security Notice USN-1455-1
Posted May 30, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1455-1 - A flaw was found in the Linux kernel's KVM (Kernel Virtual Machine) virtual cpu setup. An unprivileged local user could exploit this flaw to crash the system leading to a denial of service. Steve Grubb reported a flaw with Linux fscaps (file system base capabilities) when used to increase the permissions of a process. For application on which fscaps are in use a local attacker can disable address space randomization to make attacking the process with raised privileges easier. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2012-1601, CVE-2012-2123, CVE-2012-1601, CVE-2012-2123
SHA-256 | 4e7432dce8d4f2ad8388c5b054076886347d78c776785629fe7f4b62a2fe83b8
Ubuntu Security Notice USN-1453-1
Posted May 25, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1453-1 - A flaw was found in the Linux's kernels ext4 file system when mounted with a journal. A local, unprivileged user could exploit this flaw to cause a denial of service. A flaw was found in the Linux kernel's KVM (Kernel Virtual Machine) virtual cpu setup. An unprivileged local user could exploit this flaw to crash the system leading to a denial of service. Steve Grubb reported a flaw with Linux fscaps (file system base capabilities) when used to increase the permissions of a process. For application on which fscaps are in use a local attacker can disable address space randomization to make attacking the process with raised privileges easier. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2011-4086, CVE-2012-1601, CVE-2012-2123, CVE-2011-4086, CVE-2012-1601, CVE-2012-2123
SHA-256 | 0ce91b7b629cfee8a757c0aaf95f5ab728dc7c0c8392a5ba774db361dc1f15e3
Ubuntu Security Notice USN-1452-1
Posted May 25, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1452-1 - A flaw was found in the Linux kernel's KVM (Kernel Virtual Machine) virtual cpu setup. An unprivileged local user could exploit this flaw to crash the system leading to a denial of service. Steve Grubb reported a flaw with Linux fscaps (file system base capabilities) when used to increase the permissions of a process. For application on which fscaps are in use a local attacker can disable address space randomization to make attacking the process with raised privileges easier. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2012-1601, CVE-2012-2123, CVE-2012-1601, CVE-2012-2123
SHA-256 | 1743e5e0d5cc2c51eea82b08fd5a2379a2483478b76cb54de2e7c2aec5d7e59f
Ubuntu Security Notice USN-1448-1
Posted May 22, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1448-1 - A flaw was found in the Linux kernel's KVM (Kernel Virtual Machine) virtual cpu setup. An unprivileged local user could exploit this flaw to crash the system leading to a denial of service. Steve Grubb reported a flaw with Linux fscaps (file system base capabilities) when used to increase the permissions of a process. For application on which fscaps are in use a local attacker can disable address space randomization to make attacking the process with raised privileges easier. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2012-1601, CVE-2012-2123, CVE-2012-1601, CVE-2012-2123
SHA-256 | 9eb4c8e14c0b23d7f2e789a0cc933a87ebbf7d4b85cda35ca1ad7bcc543dadf3
Ubuntu Security Notice USN-1445-1
Posted May 18, 2012
Site security.ubuntu.com

Ubuntu Security Notice 1445-1 - A flaw was found in the Linux's kernels ext4 file system when mounted with a journal. A local, unprivileged user could exploit this flaw to cause a denial of service. A flaw was found in the Linux kernel's KVM (Kernel Virtual Machine) virtual cpu setup. An unprivileged local user could exploit this flaw to crash the system leading to a denial of service. Steve Grubb reported a flaw with Linux fscaps (file system base capabilities) when used to increase the permissions of a process. For application on which fscaps are in use a local attacker can disable address space randomization to make attacking the process with raised privileges easier. Various other issues were also addressed.

advisories | CVE-2011-4086, CVE-2012-1601, CVE-2012-2123, CVE-2011-4086, CVE-2012-1601, CVE-2012-2123
SHA-256 | 7d0b2e8d139bbdf7e42fc75ff657d5dc4fdf2c134147403f44f2f71576098f00
Ubuntu Security Notice USN-1445-1
Posted May 18, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1445-1 - A flaw was found in the Linux's kernels ext4 file system when mounted with a journal. A local, unprivileged user could exploit this flaw to cause a denial of service. A flaw was found in the Linux kernel's KVM (Kernel Virtual Machine) virtual cpu setup. An unprivileged local user could exploit this flaw to crash the system leading to a denial of service. Steve Grubb reported a flaw with Linux fscaps (file system base capabilities) when used to increase the permissions of a process. For application on which fscaps are in use a local attacker can disable address space randomization to make attacking the process with raised privileges easier. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2011-4086, CVE-2012-1601, CVE-2012-2123, CVE-2011-4086, CVE-2012-1601, CVE-2012-2123
SHA-256 | 7d0b2e8d139bbdf7e42fc75ff657d5dc4fdf2c134147403f44f2f71576098f00
Red Hat Security Advisory 2012-0670-01
Posted May 15, 2012
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2012-0670-01 - The kernel-rt packages contain the Linux kernel, the core of any Linux operating system. When a set user ID application is executed, certain personality flags for controlling the application's behavior are cleared. It was found that those flags were not cleared if the application was made privileged via file system capabilities. A local, unprivileged user could use this flaw to change the behavior of such applications, allowing them to bypass intended restrictions. Note that for default installations, no application shipped by Red Hat for Red Hat Enterprise MRG is made privileged via file system capabilities.

tags | advisory, kernel, local
systems | linux, redhat
advisories | CVE-2011-4086, CVE-2012-2123
SHA-256 | c88db0a1f1b7343e27cc22e518f7258062840aebeea6f425936d381a312cd433
Debian Security Advisory 2469-1
Posted May 11, 2012
Authored by Debian | Site debian.org

Debian Linux Security Advisory 2469-1 - Several vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service or privilege escalation.

tags | advisory, denial of service, kernel, vulnerability
systems | linux, debian
advisories | CVE-2011-4086, CVE-2012-0879, CVE-2012-1601, CVE-2012-2123, CVE-2012-2133
SHA-256 | a3855fca7a7b37d79b7f6bcc79e55a1eb3f3c10c58793ebd4569091d400c8937
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