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CVE-2014-0205

Status Candidate

Overview

The futex_wait function in kernel/futex.c in the Linux kernel before 2.6.37 does not properly maintain a certain reference count during requeue operations, which allows local users to cause a denial of service (use-after-free and system crash) or possibly gain privileges via a crafted application that triggers a zero count.

Related Files

Red Hat Security Advisory 2014-1763-01
Posted Oct 30, 2014
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2014-1763-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. A flaw was found in the way the Linux kernel's futex subsystem handled reference counting when requeuing futexes during futex_wait(). A local, unprivileged user could use this flaw to zero out the reference counter of an inode or an mm struct that backs up the memory area of the futex, which could lead to a use-after-free flaw, resulting in a system crash or, potentially, privilege escalation. A NULL pointer dereference flaw was found in the way the Linux kernel's Stream Control Transmission Protocol implementation handled simultaneous connections between the same hosts. A remote attacker could use this flaw to crash the system.

tags | advisory, remote, kernel, local, protocol
systems | linux, redhat
advisories | CVE-2014-0205, CVE-2014-5077
MD5 | ca07233fab2073aabf1d79398b6b0382
Red Hat Security Advisory 2014-1365-01
Posted Oct 7, 2014
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2014-1365-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. A flaw was found in the way the Linux kernel's futex subsystem handled reference counting when requeuing futexes during futex_wait(). A local, unprivileged user could use this flaw to zero out the reference counter of an inode or an mm struct that backs up the memory area of the futex, which could lead to a use-after-free flaw, resulting in a system crash or, potentially, privilege escalation. The security impact of this issue was discovered by Mateusz Guzik of Red Hat.

tags | advisory, kernel, local
systems | linux, redhat
advisories | CVE-2014-0205
MD5 | de85b12843c9f44e84c4590dc40e2600
Red Hat Security Advisory 2014-1167-01
Posted Sep 11, 2014
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2014-1167-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. A flaw was found in the way the Linux kernel's futex subsystem handled reference counting when requeuing futexes during futex_wait(). A local, unprivileged user could use this flaw to zero out the reference counter of an inode or an mm struct that backs up the memory area of the futex, which could lead to a use-after-free flaw, resulting in a system crash or, potentially, privilege escalation. A NULL pointer dereference flaw was found in the way the Linux kernel's networking implementation handled logging while processing certain invalid packets coming in via a VxLAN interface. A remote attacker could use this flaw to crash the system by sending a specially crafted packet to such an interface.

tags | advisory, remote, kernel, local
systems | linux, redhat
advisories | CVE-2014-0205, CVE-2014-3535, CVE-2014-3917, CVE-2014-4667
MD5 | c415b08deab80e3475be84fad802c015
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