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CVE-2012-4565

Status Candidate

Overview

The tcp_illinois_info function in net/ipv4/tcp_illinois.c in the Linux kernel before 3.4.19, when the net.ipv4.tcp_congestion_control illinois setting is enabled, allows local users to cause a denial of service (divide-by-zero error and OOPS) by reading TCP stats.

Related Files

Ubuntu Security Notice USN-1704-2
Posted Feb 2, 2013
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1704-2 - USN-1704-1 fixed vulnerabilities in the Linux kernel. Due to an unrelated regression inotify/fanotify stopped working after upgrading. This update fixes the problem. Brad Spengler discovered a flaw in the Linux kernel's uname system call. An unprivileged user could exploit this flaw to read kernel stack memory. Jon Howell reported a flaw in the Linux kernel's KVM (Kernel-based virtual machine) subsystem's handling of the XSAVE feature. On hosts, using qemu userspace, without the XSAVE feature an unprivileged local attacker could exploit this flaw to crash the system. Dmitry Monakhov reported a race condition flaw the Linux ext4 filesystem that can expose stale data. An unprivileged user could exploit this flaw to cause an information leak. A flaw was discovered in the Linux kernel's handling of script execution when module loading is enabled. A local attacker could exploit this flaw to cause a leak of kernel stack contents. Rodrigo Freire discovered a flaw in the Linux kernel's TCP illinois congestion control algorithm. A local attacker could use this to cause a denial of service. A flaw was discovered in the Linux kernel's handling of new hot-plugged memory. An unprivileged local user could exploit this flaw to cause a denial of service by crashing the system. Florian Weimer discovered that hypervkvpd, which is distributed in the Linux kernel, was not correctly validating source addresses of netlink packets. An untrusted local user can cause a denial of service by causing hypervkvpd to exit. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local, tcp, vulnerability
systems | linux, ubuntu
advisories | CVE-2012-0957, CVE-2012-4461, CVE-2012-4508, CVE-2012-4530, CVE-2012-4565, CVE-2012-5517, CVE-2012-5532
MD5 | ec938d9f9edb9255dc8518932ade6a5a
Ubuntu Security Notice USN-1704-1
Posted Jan 23, 2013
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1704-1 - Brad Spengler discovered a flaw in the Linux kernel's uname system call. An unprivileged user could exploit this flaw to read kernel stack memory. Jon Howell reported a flaw in the Linux kernel's KVM (Kernel-based virtual machine) subsystem's handling of the XSAVE feature. On hosts, using qemu userspace, without the XSAVE feature an unprivileged local attacker could exploit this flaw to crash the system. Various other issues were also addressed.

tags | advisory, kernel, local
systems | linux, ubuntu
advisories | CVE-2012-0957, CVE-2012-4461, CVE-2012-4508, CVE-2012-4530, CVE-2012-4565, CVE-2012-5517, CVE-2012-5532, CVE-2012-0957, CVE-2012-4461, CVE-2012-4508, CVE-2012-4530, CVE-2012-4565, CVE-2012-5517, CVE-2012-5532
MD5 | ad1dbf8308a60ea5598f6aae1851f7cd
Red Hat Security Advisory 2012-1580-01
Posted Dec 19, 2012
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2012-1580-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. It was found that the RHSA-2012:0862 update did not correctly fix the CVE-2011-4131 issue. A malicious Network File System version 4 server could return a crafted reply to a GETACL request, causing a denial of service on the client. A divide-by-zero flaw was found in the TCP Illinois congestion control algorithm implementation in the Linux kernel. If the TCP Illinois congestion control algorithm were in use, a local, unprivileged user could trigger this flaw and cause a denial of service.

tags | advisory, denial of service, kernel, local, tcp
systems | linux, redhat
advisories | CVE-2012-2100, CVE-2012-2375, CVE-2012-4444, CVE-2012-4565, CVE-2012-5517
MD5 | 1e660288ebddb211c27cc4445a21aa3a
Ubuntu Security Notice USN-1653-1
Posted Dec 4, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1653-1 - Rodrigo Freire discovered a flaw in the Linux kernel's TCP illinois congestion control algorithm. A local attacker could use this to cause a denial of service.

tags | advisory, denial of service, kernel, local, tcp
systems | linux, ubuntu
advisories | CVE-2012-4565
MD5 | 3850bf1f5afaddbc0bbd17e5cdd7b564
Red Hat Security Advisory 2012-1491-01
Posted Dec 4, 2012
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2012-1491-01 - The kernel-rt packages contain the Linux kernel, the core of any Linux operating system. A flaw was found in the way Netlink messages without SCM_CREDENTIALS data set were handled. When not explicitly set, the data was sent but with all values set to 0, including the process ID and user ID, causing the Netlink message to appear as if it were sent with root privileges. A local, unprivileged user could use this flaw to send spoofed Netlink messages to an application, possibly resulting in the application performing privileged operations if it relied on SCM_CREDENTIALS data for the authentication of Netlink messages.

tags | advisory, kernel, local, root, spoof
systems | linux, redhat
advisories | CVE-2012-0957, CVE-2012-2133, CVE-2012-3400, CVE-2012-3430, CVE-2012-3511, CVE-2012-3520, CVE-2012-4508, CVE-2012-4565
MD5 | aece63615129fd789a2fd3c42520e29c
Ubuntu Security Notice USN-1652-1
Posted Nov 30, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1652-1 - Brad Spengler discovered a flaw in the Linux kernel's uname system call. An unprivileged user could exploit this flaw to read kernel stack memory. Rodrigo Freire discovered a flaw in the Linux kernel's TCP illinois congestion control algorithm. A local attacker could use this to cause a denial of service.

tags | advisory, denial of service, kernel, local, tcp
systems | linux, ubuntu
advisories | CVE-2012-0957, CVE-2012-4565, CVE-2012-0957, CVE-2012-4565
MD5 | a16eb73a5bd3c36bbf6d17623c3fdeda
Ubuntu Security Notice USN-1651-1
Posted Nov 30, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1651-1 - Rodrigo Freire discovered a flaw in the Linux kernel's TCP illinois congestion control algorithm. A local attacker could use this to cause a denial of service.

tags | advisory, denial of service, kernel, local, tcp
systems | linux, ubuntu
advisories | CVE-2012-4565
MD5 | ee33568063200090945b0d819176d01e
Ubuntu Security Notice USN-1650-1
Posted Nov 30, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1650-1 - Rodrigo Freire discovered a flaw in the Linux kernel's TCP illinois congestion control algorithm. A local attacker could use this to cause a denial of service.

tags | advisory, denial of service, kernel, local, tcp
systems | linux, ubuntu
advisories | CVE-2012-4565
MD5 | 854b8b47a5fdc897ebe16070a3e4676c
Ubuntu Security Notice USN-1649-1
Posted Nov 30, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1649-1 - Brad Spengler discovered a flaw in the Linux kernel's uname system call. An unprivileged user could exploit this flaw to read kernel stack memory. Rodrigo Freire discovered a flaw in the Linux kernel's TCP illinois congestion control algorithm. A local attacker could use this to cause a denial of service.

tags | advisory, denial of service, kernel, local, tcp
systems | linux, ubuntu
advisories | CVE-2012-0957, CVE-2012-4565, CVE-2012-0957, CVE-2012-4565
MD5 | 14264958db6c580c168e9c52add81ebb
Ubuntu Security Notice USN-1648-1
Posted Nov 30, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1648-1 - Brad Spengler discovered a flaw in the Linux kernel's uname system call. An unprivileged user could exploit this flaw to read kernel stack memory. Rodrigo Freire discovered a flaw in the Linux kernel's TCP illinois congestion control algorithm. A local attacker could use this to cause a denial of service.

tags | advisory, denial of service, kernel, local, tcp
systems | linux, ubuntu
advisories | CVE-2012-0957, CVE-2012-4565, CVE-2012-0957, CVE-2012-4565
MD5 | 2a28082bb1636da0749c84985d175606
Ubuntu Security Notice USN-1647-1
Posted Nov 30, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1647-1 - Brad Spengler discovered a flaw in the Linux kernel's uname system call. An unprivileged user could exploit this flaw to read kernel stack memory. Rodrigo Freire discovered a flaw in the Linux kernel's TCP illinois congestion control algorithm. A local attacker could use this to cause a denial of service.

tags | advisory, denial of service, kernel, local, tcp
systems | linux, ubuntu
advisories | CVE-2012-0957, CVE-2012-4565, CVE-2012-0957, CVE-2012-4565
MD5 | f01b7bd517617dc00d7e3e8c8cf22f3f
Ubuntu Security Notice USN-1646-1
Posted Nov 30, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1646-1 - Brad Spengler discovered a flaw in the Linux kernel's uname system call. An unprivileged user could exploit this flaw to read kernel stack memory. Rodrigo Freire discovered a flaw in the Linux kernel's TCP illinois congestion control algorithm. A local attacker could use this to cause a denial of service.

tags | advisory, denial of service, kernel, local, tcp
systems | linux, ubuntu
advisories | CVE-2012-0957, CVE-2012-4565, CVE-2012-0957, CVE-2012-4565
MD5 | 858c6e3864c4022b133dd0649302b446
Ubuntu Security Notice USN-1645-1
Posted Nov 30, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1645-1 - Brad Spengler discovered a flaw in the Linux kernel's uname system call. An unprivileged user could exploit this flaw to read kernel stack memory. Rodrigo Freire discovered a flaw in the Linux kernel's TCP illinois congestion control algorithm. A local attacker could use this to cause a denial of service.

tags | advisory, denial of service, kernel, local, tcp
systems | linux, ubuntu
advisories | CVE-2012-0957, CVE-2012-4565, CVE-2012-0957, CVE-2012-4565
MD5 | 6183c5fa69699ff34b662708e1fff52a
Ubuntu Security Notice USN-1644-1
Posted Nov 30, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1644-1 - Brad Spengler discovered a flaw in the Linux kernel's uname system call. An unprivileged user could exploit this flaw to read kernel stack memory. Rodrigo Freire discovered a flaw in the Linux kernel's TCP illinois congestion control algorithm. A local attacker could use this to cause a denial of service.

tags | advisory, denial of service, kernel, local, tcp
systems | linux, ubuntu
advisories | CVE-2012-0957, CVE-2012-4565, CVE-2012-0957, CVE-2012-4565
MD5 | c1adb988e46f5612a943270fa81f87e0
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