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CVE-2013-4270

Status Candidate

Overview

The net_ctl_permissions function in net/sysctl_net.c in the Linux kernel before 3.11.5 does not properly determine uid and gid values, which allows local users to bypass intended /proc/sys/net restrictions via a crafted application.

Related Files

Red Hat Security Advisory 2014-0100-01
Posted Jan 28, 2014
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2014-0100-01 - The kernel-rt packages contain the Linux kernel, the core of any Linux operating system. A flaw was found in the way the Linux kernel's TCP/IP protocol suite implementation handled sending of certain UDP packets over sockets that used the UDP_CORK option when the UDP Fragmentation Offload feature was enabled on the output device. A local, unprivileged user could use this flaw to cause a denial of service or, potentially, escalate their privileges on the system. A flaw was found in the way the perf_trace_event_perm() function in the Linux kernel checked permissions for the function tracer functionality. An unprivileged local user could use this flaw to enable function tracing and cause a denial of service on the system.

tags | advisory, denial of service, kernel, local, udp, tcp, protocol
systems | linux, redhat
advisories | CVE-2013-2929, CVE-2013-2930, CVE-2013-4270, CVE-2013-4470, CVE-2013-6378, CVE-2013-6383, CVE-2013-6431
SHA-256 | 727398f9fbb6e96f7d037aef65ed857962d0af32a4a9cdc6be996dd37bd672bc
Ubuntu Security Notice USN-2049-1
Posted Dec 7, 2013
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2049-1 - Miroslav Vadkerti discovered a flaw in how the permissions for network sysctls are handled in the Linux kernel. An unprivileged local user could exploit this flaw to have privileged access to files in /proc/sys/net/. A flaw was discovered in the Linux kernel's dm snapshot facility. A remote authenticated user could exploit this flaw to obtain sensitive information or modify/corrupt data. Various other issues were also addressed.

tags | advisory, remote, kernel, local
systems | linux, ubuntu
advisories | CVE-2013-4270, CVE-2013-4299, CVE-2013-4343, CVE-2013-4350, CVE-2013-4387, CVE-2013-4470, CVE-2013-4270, CVE-2013-4299, CVE-2013-4343, CVE-2013-4350, CVE-2013-4387, CVE-2013-4470
SHA-256 | 5f701e0e3991e00d556fe8c036cde5af0ea754679c09eefb7bdf25b931207b4c
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