CVE-2012-4565
published 2012-12-21CVE-2012-4565: 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…
PriorityP414medium4.7CVSS 2.0
AVLACMAuNCNINAC
EPSS
0.49%
39.6th percentile
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.
Affected
23 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 3.2.35-1 (bookworm) | linux 3.2.35-1 (bookworm) |
| linux | linux_kernel | <= 3.4.18 | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 3.2.35-1 | 3.2.35-1 |
| linux | linux_kernel | >= 0 < 3.2.35-1 | 3.2.35-1 |
| linux | linux_kernel | >= 0 < 3.2.35-1 | 3.2.35-1 |
| linux | linux_kernel | >= 0 < 3.2.35-1 | 3.2.35-1 |
CVSS provenance
nvdv2.04.7MEDIUMAV:L/AC:M/Au:N/C:N/I:N/A:C
osv4.7MEDIUM
vendor_ubuntu4.9MEDIUM
vendor_debian4.7MEDIUM
vendor_redhat4.7MEDIUM
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Ubuntu
Linux kernel (Quantal HWE) regression
vendor_ubuntu·2013-02-01·CVSS 4.9
[MEDIUM] Linux kernel (Quantal HWE) regression
Title: Linux kernel (Quantal HWE) regression
Summary: USN-1704-1 introduced a regression in the Linux kernel.
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.
We apologize for the inconvenience.
Original advisory details:
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.
(CVE-2012-0957)
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. (CVE-2012-4461)
Dmitry Monakho
Ubuntu
Linux kernel (Quantal HWE) vulnerabilities
vendor_ubuntu·2013-01-22·CVSS 4.9
CVE-2012-0957 [MEDIUM] Linux kernel (Quantal HWE) vulnerabilities
Title: Linux kernel (Quantal HWE) vulnerabilities
Summary: Several security issues were fixed in the kernel.
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.
(CVE-2012-0957)
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. (CVE-2012-4461)
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. (CVE-2012-4508)
A flaw was discovered in the Linux kernel's handling o
Ubuntu
Linux kernel (EC2) vulnerability
vendor_ubuntu·2012-12-04·CVSS 4.7
CVE-2012-4565 [MEDIUM] Linux kernel (EC2) vulnerability
Title: Linux kernel (EC2) vulnerability
Summary: The system could be made to run programs as an administrator.
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. (CVE-2012-4565)
Mathias Krause discovered an information leak in the Linux kernel's TUN/TAP
device driver. A local user could exploit this flaw to examine part of the
kernel's stack memory. (CVE-2012-6547)
Denys Fedoryshchenko discovered a flaw in the Linux kernel's TCP receive
processing for IPv4. A remote attacker could exploit this flaw to cause a
denial of service (kernel resource consumption) via a flood of SYN+FIN TCP
packets. (CVE-2012-6638)
A flaw was discovered in the requeuing of futexes in the Linux kernel.
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2012-11-30·CVSS 4.9
CVE-2012-0957 [MEDIUM] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the kernel.
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.
(CVE-2012-0957)
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. (CVE-2012-4508)
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. (CVE-2012-4565)
Mathias Krause discovered a flaw in the Linux kernel's XFRM netlink
interface. A local user with the NET_ADMIN capability could exploit this
flaw to leak the contents of
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2012-11-30·CVSS 4.9
CVE-2012-0957 [MEDIUM] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the kernel.
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.
(CVE-2012-0957)
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. (CVE-2012-4565)
Mathias Krause discovered a flaw in the Linux kernel's XFRM netlink
interface. A local user with the NET_ADMIN capability could exploit this
flaw to leak the contents of kernel memory. (CVE-2012-6536)
Mathias Krause discovered several errors in the Linux kernel's xfrm_user
implementation. A local attacker could exploit these flaws to examine parts
of kernel m
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2012-11-30·CVSS 4.9
CVE-2012-0957 [MEDIUM] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the kernel.
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.
(CVE-2012-0957)
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. (CVE-2012-4565)
Mathias Krause discovered a flaw in the Linux kernel's XFRM netlink
interface. A local user with the NET_ADMIN capability could exploit this
flaw to leak the contents of kernel memory. (CVE-2012-6536)
Mathias Krause discovered several errors in the Linux kernel's xfrm_user
implementation. A local attacker could exploit these flaws to examine parts
of kernel m
Ubuntu
Linux kernel (OMAP4) vulnerabilities
vendor_ubuntu·2012-11-30·CVSS 4.9
CVE-2012-0957 [MEDIUM] Linux kernel (OMAP4) vulnerabilities
Title: Linux kernel (OMAP4) vulnerabilities
Summary: Several security issues were fixed in the kernel.
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.
(CVE-2012-0957)
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. (CVE-2012-4508)
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. (CVE-2012-4565)
Mathias Krause discovered a flaw in the Linux kernel's XFRM netlink
interface. A local user with the NET_ADMIN capability could exploit this
flaw to leak the con
Ubuntu
Linux kernel (OMAP4) vulnerabilities
vendor_ubuntu·2012-11-30·CVSS 4.9
CVE-2012-0957 [MEDIUM] Linux kernel (OMAP4) vulnerabilities
Title: Linux kernel (OMAP4) vulnerabilities
Summary: Several security issues were fixed in the kernel.
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.
(CVE-2012-0957)
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. (CVE-2012-4565)
Mathias Krause discovered a flaw in the Linux kernel's XFRM netlink
interface. A local user with the NET_ADMIN capability could exploit this
flaw to leak the contents of kernel memory. (CVE-2012-6536)
Mathias Krause discovered several errors in the Linux kernel's xfrm_user
implementation. A local attacker could exploit these flaws to examine parts
of
Ubuntu
Linux kernel vulnerability
vendor_ubuntu·2012-11-30·CVSS 4.7
CVE-2012-4565 [MEDIUM] Linux kernel vulnerability
Title: Linux kernel vulnerability
Summary: The system could be made to crash under certain conditions.
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. (CVE-2012-4565)
Mathias Krause discovered an information leak in the Linux kernel's TUN/TAP
device driver. A local user could exploit this flaw to examine part of the
kernel's stack memory. (CVE-2012-6547)
Denys Fedoryshchenko discovered a flaw in the Linux kernel's TCP receive
processing for IPv4. A remote attacker could exploit this flaw to cause a
denial of service (kernel resource consumption) via a flood of SYN+FIN TCP
packets. (CVE-2012-6638)
A flaw was discovered in the requeuing of futexes in the Linux kernel. A
local
Ubuntu
Linux kernel vulnerability
vendor_ubuntu·2012-11-30
CVE-2012-4565 Linux kernel vulnerability
Title: Linux kernel vulnerability
Summary: The system could be made to crash under certain conditions.
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.
Instructions: After a standard system update you need to reboot your computer to make
all the necessary changes.
Ubuntu
Linux kernel (Oneiric backport) vulnerabilities
vendor_ubuntu·2012-11-30·CVSS 4.9
CVE-2012-0957 [MEDIUM] Linux kernel (Oneiric backport) vulnerabilities
Title: Linux kernel (Oneiric backport) vulnerabilities
Summary: Several security issues were fixed in the kernel.
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.
(CVE-2012-0957)
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. (CVE-2012-4565)
Mathias Krause discovered a flaw in the Linux kernel's XFRM netlink
interface. A local user with the NET_ADMIN capability could exploit this
flaw to leak the contents of kernel memory. (CVE-2012-6536)
Mathias Krause discovered several errors in the Linux kernel's xfrm_user
implementation. A local attacker could exploit these flaws to examin
Ubuntu
Linux kernel (OMAP4) vulnerabilities
vendor_ubuntu·2012-11-30·CVSS 4.9
CVE-2012-0957 [MEDIUM] Linux kernel (OMAP4) vulnerabilities
Title: Linux kernel (OMAP4) vulnerabilities
Summary: Several security issues were fixed in the kernel.
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.
(CVE-2012-0957)
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. (CVE-2012-4565)
Mathias Krause discovered a flaw in the Linux kernel's XFRM netlink
interface. A local user with the NET_ADMIN capability could exploit this
flaw to leak the contents of kernel memory. (CVE-2012-6536)
Mathias Krause discovered several errors in the Linux kernel's xfrm_user
implementation. A local attacker could exploit these flaws to examine parts
of
Red Hat
kernel: net: divide by zero in tcp algorithm illinois
vendor_redhat·2012-10-31·CVSS 4.7
CVE-2012-4565 [MEDIUM] kernel: net: divide by zero in tcp algorithm illinois
kernel: net: divide by zero in tcp algorithm illinois
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.
Statement: This issue did not affect the version of Linux kernel as shipped with Red Hat Enterprise Linux 5.
This issue did affect the version of Linux kernel as shipped with Red Hat Enterprise Linux 6.
This issue did affect the version of Linux kernel as shipped with Red Hat Enterprise MRG 2.
Package: kernel (Red Hat Enterprise Linux 5) - Not affected
Debian
CVE-2012-4565: linux - The tcp_illinois_info function in net/ipv4/tcp_illinois.c in the Linux kernel be...
vendor_debian·2012·CVSS 4.7
CVE-2012-4565 [MEDIUM] CVE-2012-4565: linux - The tcp_illinois_info function in net/ipv4/tcp_illinois.c in the Linux kernel be...
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.
Scope: local
bookworm: resolved (fixed in 3.2.35-1)
bullseye: resolved (fixed in 3.2.35-1)
forky: resolved (fixed in 3.2.35-1)
sid: resolved (fixed in 3.2.35-1)
trixie: resolved (fixed in 3.2.35-1)
GHSA
GHSA-gmmj-v76j-xgxw: The tcp_illinois_info function in net/ipv4/tcp_illinois
ghsa_unreviewed·2022-05-17
CVE-2012-4565 [MEDIUM] GHSA-gmmj-v76j-xgxw: The tcp_illinois_info function in net/ipv4/tcp_illinois
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.
OSV
CVE-2012-4565: The tcp_illinois_info function in net/ipv4/tcp_illinois
osv·2012-12-21·CVSS 4.7
CVE-2012-4565 [MEDIUM] CVE-2012-4565: The tcp_illinois_info function in net/ipv4/tcp_illinois
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.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2012-4565 kernel: net: divide by zero in tcp algorithm illinois
bugzilla·2012-10-31·CVSS 4.7
CVE-2012-4565 [MEDIUM] CVE-2012-4565 kernel: net: divide by zero in tcp algorithm illinois
CVE-2012-4565 kernel: net: divide by zero in tcp algorithm illinois
Reading TCP stats when using TCP Illinois congestion control algorithm can cause a divide by zero kernel oops.
An unprivileged local user could use this flaw to crash the system.
Proposed upstream patch:
http://thread.gmane.org/gmane.linux.network/247871
Acknowledgements:
This issue was discovered by Rodrigo Freire of Red Hat.
Discussion:
Created kernel tracking bugs for this issue
Affects: fedora-all [bug 871923]
---
Statement:
This issue did not affect the version of Linux kernel as shipped with Red Hat Enterprise Linux 5.
This issue did affect the version of Linux kernel as shipped with Red Hat Enterprise Linux 6.
This issue did affect the version of Linux kernel as shipped with Red Hat Enterprise MRG 2.
-
Bugzilla
CVE-2012-4565 kernel: net: divide by zero in tcp algorithm illinois [fedora-all]
bugzilla·2012-10-31·CVSS 4.7
CVE-2012-4565 [MEDIUM] CVE-2012-4565 kernel: net: divide by zero in tcp algorithm illinois [fedora-all]
CVE-2012-4565 kernel: net: divide by zero in tcp algorithm illinois [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of Fedora.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When creating a Bodhi update request, please use the bodhi submission link
noted in the next comment(s). This will include the bug IDs of this
tracking bug as well as the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
Bodhi notes field when available.
Please note: this issue
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=8f363b77ee4fbf7c3bbcf5ec2c5ca482d396d664http://lists.fedoraproject.org/pipermail/package-announce/2012-November/091110.htmlhttp://rhn.redhat.com/errata/RHSA-2012-1580.htmlhttp://secunia.com/advisories/51409http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.4.19http://www.openwall.com/lists/oss-security/2012/10/31/5http://www.securityfocus.com/bid/56346http://www.ubuntu.com/usn/USN-1644-1http://www.ubuntu.com/usn/USN-1645-1http://www.ubuntu.com/usn/USN-1646-1http://www.ubuntu.com/usn/USN-1647-1http://www.ubuntu.com/usn/USN-1648-1http://www.ubuntu.com/usn/USN-1649-1http://www.ubuntu.com/usn/USN-1650-1http://www.ubuntu.com/usn/USN-1651-1http://www.ubuntu.com/usn/USN-1652-1https://bugzilla.redhat.com/show_bug.cgi?id=871848https://github.com/torvalds/linux/commit/8f363b77ee4fbf7c3bbcf5ec2c5ca482d396d664http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=8f363b77ee4fbf7c3bbcf5ec2c5ca482d396d664http://lists.fedoraproject.org/pipermail/package-announce/2012-November/091110.htmlhttp://rhn.redhat.com/errata/RHSA-2012-1580.htmlhttp://secunia.com/advisories/51409http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.4.19http://www.openwall.com/lists/oss-security/2012/10/31/5http://www.securityfocus.com/bid/56346http://www.ubuntu.com/usn/USN-1644-1http://www.ubuntu.com/usn/USN-1645-1http://www.ubuntu.com/usn/USN-1646-1http://www.ubuntu.com/usn/USN-1647-1http://www.ubuntu.com/usn/USN-1648-1http://www.ubuntu.com/usn/USN-1649-1http://www.ubuntu.com/usn/USN-1650-1http://www.ubuntu.com/usn/USN-1651-1http://www.ubuntu.com/usn/USN-1652-1https://bugzilla.redhat.com/show_bug.cgi?id=871848https://github.com/torvalds/linux/commit/8f363b77ee4fbf7c3bbcf5ec2c5ca482d396d664
2012-12-21
Published