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CVE-2012-2136

Status Candidate

Overview

The sock_alloc_send_pskb function in net/core/sock.c in the Linux kernel before 3.4.5 does not properly validate a certain length value, which allows local users to cause a denial of service (heap-based buffer overflow and system crash) or possibly gain privileges by leveraging access to a TUN/TAP device.

Related Files

EMC VPLEX GeoSynchrony 5.2.1 Traversal / Session Timeout
Posted Mar 27, 2014
Site emc.com

EMC VPLEX GeoSynchrony versions 4.0 through 5.2.1 suffer from path traversal, timeout validity, session fixation, and various other vulnerabilities.

tags | advisory, vulnerability
advisories | CVE-2002-2443, CVE-2011-1044, CVE-2011-3389, CVE-2011-4110, CVE-2012-0814, CVE-2012-2136, CVE-2012-5166, CVE-2013-1667, CVE-2014-0632, CVE-2014-0633, CVE-2014-0634, CVE-2014-0635
MD5 | 4fabf55ed8ae07e61947cc08474da68d
Ubuntu Security Notice USN-1598-1
Posted Oct 10, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1598-1 - An error was discovered in the Linux kernel's network TUN/TAP device implementation. A local user with access to the TUN/TAP interface (which is not available to unprivileged users until granted by a root user) could exploit this flaw to crash the system or potential gain administrative privileges.

tags | advisory, kernel, local, root
systems | linux, ubuntu
advisories | CVE-2012-2136
MD5 | 0c785558c0677eef63b7fd00a8a76257
Ubuntu Security Notice USN-1539-1
Posted Aug 15, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1539-1 - An error was discovered in the Linux kernel's network TUN/TAP device implementation. A local user with access to the TUN/TAP interface (which is not available to unprivileged users until granted by a root user) could exploit this flaw to crash the system or potential gain administrative privileges. Ulrich Obergfell discovered an error in the Linux kernel's memory management subsystem on 32 bit PAE systems with more than 4GB of memory installed. A local unprivileged user could exploit this flaw to crash the system. Various other issues were also addressed.

tags | advisory, kernel, local, root
systems | linux, ubuntu
advisories | CVE-2012-2136, CVE-2012-2373, CVE-2012-3375, CVE-2012-3400, CVE-2012-2136, CVE-2012-2373, CVE-2012-3375, CVE-2012-3400
MD5 | c6958da0516ad29999afbe85cd2acea0
Ubuntu Security Notice USN-1538-1
Posted Aug 15, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1538-1 - An error was discovered in the Linux kernel's network TUN/TAP device implementation. A local user with access to the TUN/TAP interface (which is not available to unprivileged users until granted by a root user) could exploit this flaw to crash the system or potential gain administrative privileges. A flaw was found in the Linux kernel's Reliable Datagram Sockets (RDS) protocol implementation. A local, unprivileged user could use this flaw to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local, root, protocol
systems | linux, ubuntu
advisories | CVE-2012-2136, CVE-2012-2372, CVE-2012-2390, CVE-2012-2136, CVE-2012-2372, CVE-2012-2390
MD5 | 5ef278ed216da2b6e05e17214919ad89
Ubuntu Security Notice USN-1535-1
Posted Aug 13, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1535-1 - An error was discovered in the Linux kernel's network TUN/TAP device implementation. A local user with access to the TUN/TAP interface (which is not available to unprivileged users until granted by a root user) could exploit this flaw to crash the system or potential gain administrative privileges. An error was discovered in the Linux kernel's memory subsystem (hugetlb). An unprivileged local user could exploit this flaw to cause a denial of service (crash the system). Various other issues were also addressed.

tags | advisory, denial of service, kernel, local, root
systems | linux, ubuntu
advisories | CVE-2012-2136, CVE-2012-2390, CVE-2012-2136, CVE-2012-2390
MD5 | cf6d7fd3511ba46e569dc7497cd7b66b
Ubuntu Security Notice USN-1534-1
Posted Aug 13, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1534-1 - An error was discovered in the Linux kernel's network TUN/TAP device implementation. A local user with access to the TUN/TAP interface (which is not available to unprivileged users until granted by a root user) could exploit this flaw to crash the system or potential gain administrative privileges. An error was discovered in the Linux kernel's memory subsystem (hugetlb). An unprivileged local user could exploit this flaw to cause a denial of service (crash the system). Various other issues were also addressed.

tags | advisory, denial of service, kernel, local, root
systems | linux, ubuntu
advisories | CVE-2012-2136, CVE-2012-2390, CVE-2012-2136, CVE-2012-2390
MD5 | b471f92c9127d7c31a949576671b66cb
Ubuntu Security Notice USN-1533-1
Posted Aug 13, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1533-1 - An error was discovered in the Linux kernel's network TUN/TAP device implementation. A local user with access to the TUN/TAP interface (which is not available to unprivileged users until granted by a root user) could exploit this flaw to crash the system or potential gain administrative privileges. Ulrich Obergfell discovered an error in the Linux kernel's memory management subsystem on 32 bit PAE systems with more than 4GB of memory installed. A local unprivileged user could exploit this flaw to crash the system. Various other issues were also addressed.

tags | advisory, kernel, local, root
systems | linux, ubuntu
advisories | CVE-2012-2136, CVE-2012-2373, CVE-2012-3375, CVE-2012-3400, CVE-2012-2136, CVE-2012-2373, CVE-2012-3375, CVE-2012-3400
MD5 | 02e3ab665f99c2becbff7af3f76da4d5
Ubuntu Security Notice USN-1532-1
Posted Aug 13, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1532-1 - An error was discovered in the Linux kernel's network TUN/TAP device implementation. A local user with access to the TUN/TAP interface (which is not available to unprivileged users until granted by a root user) could exploit this flaw to crash the system or potential gain administrative privileges. Ulrich Obergfell discovered an error in the Linux kernel's memory management subsystem on 32 bit PAE systems with more than 4GB of memory installed. A local unprivileged user could exploit this flaw to crash the system. Various other issues were also addressed.

tags | advisory, kernel, local, root
systems | linux, ubuntu
advisories | CVE-2012-2136, CVE-2012-2373, CVE-2012-3375, CVE-2012-3400, CVE-2012-2136, CVE-2012-2373, CVE-2012-3375, CVE-2012-3400
MD5 | 643e40ef4808b43a2dda3fe2a84ff6d9
Ubuntu Security Notice USN-1531-1
Posted Aug 13, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1531-1 - An error was discovered in the Linux kernel's network TUN/TAP device implementation. A local user with access to the TUN/TAP interface (which is not available to unprivileged users until granted by a root user) could exploit this flaw to crash the system or potential gain administrative privileges. A flaw was found in the Linux kernel's Reliable Datagram Sockets (RDS) protocol implementation. A local, unprivileged user could use this flaw to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local, root, protocol
systems | linux, ubuntu
advisories | CVE-2012-2136, CVE-2012-2372, CVE-2012-2390, CVE-2012-2136, CVE-2012-2372, CVE-2012-2390
MD5 | 8b4dae4786f2ee8fc7cd5d2a4d254774
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
MD5 | e2d239d87239c06731337489dde960ea
Ubuntu Security Notice USN-1529-1
Posted Aug 13, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1529-1 - A flaw was discovered in the Linux kernel's macvtap device driver, which is used in KVM (Kernel-based Virtual Machine) to create a network bridge between host and guest. A privileged user in a guest could exploit this flaw to crash the host, if the vhost_net module is loaded with the experimental_zcopytx option enabled. An error was discovered in the Linux kernel's network TUN/TAP device implementation. A local user with access to the TUN/TAP interface (which is not available to unprivileged users until granted by a root user) could exploit this flaw to crash the system or potential gain administrative privileges. Various other issues were also addressed.

tags | advisory, kernel, local, root
systems | linux, ubuntu
advisories | CVE-2012-2119, CVE-2012-2136, CVE-2012-2137, CVE-2012-2372, CVE-2012-2373, CVE-2012-3364, CVE-2012-3375, CVE-2012-3400, CVE-2012-2119, CVE-2012-2136, CVE-2012-2137, CVE-2012-2372, CVE-2012-2373, CVE-2012-3364, CVE-2012-3375, CVE-2012-3400
MD5 | af2ef686a035e339e802557747aba3df
Ubuntu Security Notice USN-1514-1
Posted Aug 13, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1514-1 - A flaw was discovered in the Linux kernel's macvtap device driver, which is used in KVM (Kernel-based Virtual Machine) to create a network bridge between host and guest. A privileged user in a guest could exploit this flaw to crash the host, if the vhost_net module is loaded with the experimental_zcopytx option enabled. An error was discovered in the Linux kernel's network TUN/TAP device implementation. A local user with access to the TUN/TAP interface (which is not available to unprivileged users until granted by a root user) could exploit this flaw to crash the system or potential gain administrative privileges. Various other issues were also addressed.

tags | advisory, kernel, local, root
systems | linux, ubuntu
advisories | CVE-2012-2119, CVE-2012-2136, CVE-2012-2137, CVE-2012-2372, CVE-2012-2373, CVE-2012-3364, CVE-2012-3375, CVE-2012-3400, CVE-2012-2119, CVE-2012-2136, CVE-2012-2137, CVE-2012-2372, CVE-2012-2373, CVE-2012-3364, CVE-2012-3375, CVE-2012-3400
MD5 | 135d74622b0eb63c6f412c8920b6b530
Red Hat Security Advisory 2012-1087-01
Posted Jul 17, 2012
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2012-1087-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. This update fixes the following security issue: It was found that the data_len parameter of the sock_alloc_send_pskb() function in the Linux kernel's networking implementation was not validated before use. A local user with access to a TUN/TAP virtual interface could use this flaw to crash the system or, potentially, escalate their privileges. Note that unprivileged users cannot access TUN/TAP devices until the root user grants them access.

tags | advisory, kernel, local, root
systems | linux, redhat
advisories | CVE-2012-2136
MD5 | 1f5d06d35eeb9528ecc82d8e2a1e0ebb
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
MD5 | 2db63b5e18312f65ad820bccf0795f8e
Red Hat Security Advisory 2012-0690-01
Posted May 29, 2012
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2012-0690-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. This update fixes the following security issue: It was found that the data_len parameter of the sock_alloc_send_pskb() function in the Linux kernel's networking implementation was not validated before use. A local user with access to a TUN/TAP virtual interface could use this flaw to crash the system or, potentially, escalate their privileges. Note that unprivileged users cannot access TUN/TAP devices until the root user grants them access.

tags | advisory, kernel, local, root
systems | linux, redhat
advisories | CVE-2012-2136
MD5 | 0eafb51e78df3c7eedebd68b3e6d01da
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