Vulnerabilities > CVE-2012-2121 - Permissions, Privileges, and Access Controls vulnerability in Linux Kernel
Attack vector
LOCAL Attack complexity
LOW Privileges required
NONE Confidentiality impact
NONE Integrity impact
NONE Availability impact
COMPLETE Summary
The KVM implementation in the Linux kernel before 3.3.4 does not properly manage the relationships between memory slots and the iommu, which allows guest OS users to cause a denial of service (memory leak and host OS crash) by leveraging administrative access to the guest OS to conduct hotunplug and hotplug operations on devices.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Accessing, Modifying or Executing Executable Files An attack of this type exploits a system's configuration that allows an attacker to either directly access an executable file, for example through shell access; or in a possible worst case allows an attacker to upload a file and then execute it. Web servers, ftp servers, and message oriented middleware systems which have many integration points are particularly vulnerable, because both the programmers and the administrators must be in synch regarding the interfaces and the correct privileges for each interface.
- Leverage Executable Code in Non-Executable Files An attack of this type exploits a system's trust in configuration and resource files, when the executable loads the resource (such as an image file or configuration file) the attacker has modified the file to either execute malicious code directly or manipulate the target process (e.g. application server) to execute based on the malicious configuration parameters. Since systems are increasingly interrelated mashing up resources from local and remote sources the possibility of this attack occurring is high. The attack can be directed at a client system, such as causing buffer overrun through loading seemingly benign image files, as in Microsoft Security Bulletin MS04-028 where specially crafted JPEG files could cause a buffer overrun once loaded into the browser. Another example targets clients reading pdf files. In this case the attacker simply appends javascript to the end of a legitimate url for a pdf (http://www.gnucitizen.org/blog/danger-danger-danger/) http://path/to/pdf/file.pdf#whatever_name_you_want=javascript:your_code_here The client assumes that they are reading a pdf, but the attacker has modified the resource and loaded executable javascript into the client's browser process. The attack can also target server processes. The attacker edits the resource or configuration file, for example a web.xml file used to configure security permissions for a J2EE app server, adding role name "public" grants all users with the public role the ability to use the administration functionality. The server trusts its configuration file to be correct, but when they are manipulated, the attacker gains full control.
- Blue Boxing This type of attack against older telephone switches and trunks has been around for decades. A tone is sent by an adversary to impersonate a supervisor signal which has the effect of rerouting or usurping command of the line. While the US infrastructure proper may not contain widespread vulnerabilities to this type of attack, many companies are connected globally through call centers and business process outsourcing. These international systems may be operated in countries which have not upgraded Telco infrastructure and so are vulnerable to Blue boxing. Blue boxing is a result of failure on the part of the system to enforce strong authorization for administrative functions. While the infrastructure is different than standard current applications like web applications, there are historical lessons to be learned to upgrade the access control for administrative functions.
- Restful Privilege Elevation Rest uses standard HTTP (Get, Put, Delete) style permissions methods, but these are not necessarily correlated generally with back end programs. Strict interpretation of HTTP get methods means that these HTTP Get services should not be used to delete information on the server, but there is no access control mechanism to back up this logic. This means that unless the services are properly ACL'd and the application's service implementation are following these guidelines then an HTTP request can easily execute a delete or update on the server side. The attacker identifies a HTTP Get URL such as http://victimsite/updateOrder, which calls out to a program to update orders on a database or other resource. The URL is not idempotent so the request can be submitted multiple times by the attacker, additionally, the attacker may be able to exploit the URL published as a Get method that actually performs updates (instead of merely retrieving data). This may result in malicious or inadvertent altering of data on the server.
- Target Programs with Elevated Privileges This attack targets programs running with elevated privileges. The attacker would try to leverage a bug in the running program and get arbitrary code to execute with elevated privileges. For instance an attacker would look for programs that write to the system directories or registry keys (such as HKLM, which stores a number of critical Windows environment variables). These programs are typically running with elevated privileges and have usually not been designed with security in mind. Such programs are excellent exploit targets because they yield lots of power when they break. The malicious user try to execute its code at the same level as a privileged system call.
Nessus
NASL family Oracle Linux Local Security Checks NASL id ORACLELINUX_ELSA-2012-2020.NASL description Description of changes: * CVE-2012-2123: Privilege escalation when assigning permissions using fcaps. If a process increases permissions using fcaps, all of the dangerous personality flags which are cleared for suid apps are not cleared. This has allowed programs that gained elevated permissions using fcaps to disable the address space randomization of other processes. * CVE-2012-2121: Memory leak in KVM device assignment. KVM uses memory slots to track and map guest regions of memory. When device assignment is used, the pages backing these slots are pinned in memory and mapped into the iommu. The problem is that when a memory slot is destroyed the pages for the associated memory slot are neither unpinned nor unmapped from the iommu. * Memory corruption in KVM device assignment slot handling. A race condition in the KVM device assignment slot handling caused by missing locks around the unmapping of memory slots could cause a memory corruption. * CVE-2012-2136: Privilege escalation in TUN/TAP virtual device. The length of packet fragments to be sent wasn last seen 2020-06-01 modified 2020-06-02 plugin id 68675 published 2013-07-12 reporter This script is Copyright (C) 2013-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/68675 title Oracle Linux 5 / 6 : Unbreakable Enterprise kernel (ELSA-2012-2020) code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Oracle Linux Security Advisory ELSA-2012-2020. # include("compat.inc"); if (description) { script_id(68675); script_version("1.11"); script_cvs_date("Date: 2019/09/30 10:58:17"); script_cve_id("CVE-2012-1179", "CVE-2012-2121", "CVE-2012-2123", "CVE-2012-2136", "CVE-2012-2137", "CVE-2012-2373"); script_name(english:"Oracle Linux 5 / 6 : Unbreakable Enterprise kernel (ELSA-2012-2020)"); script_summary(english:"Checks rpm output for the updated packages"); script_set_attribute( attribute:"synopsis", value:"The remote Oracle Linux host is missing one or more security updates." ); script_set_attribute( attribute:"description", value: "Description of changes: * CVE-2012-2123: Privilege escalation when assigning permissions using fcaps. If a process increases permissions using fcaps, all of the dangerous personality flags which are cleared for suid apps are not cleared. This has allowed programs that gained elevated permissions using fcaps to disable the address space randomization of other processes. * CVE-2012-2121: Memory leak in KVM device assignment. KVM uses memory slots to track and map guest regions of memory. When device assignment is used, the pages backing these slots are pinned in memory and mapped into the iommu. The problem is that when a memory slot is destroyed the pages for the associated memory slot are neither unpinned nor unmapped from the iommu. * Memory corruption in KVM device assignment slot handling. A race condition in the KVM device assignment slot handling caused by missing locks around the unmapping of memory slots could cause a memory corruption. * CVE-2012-2136: Privilege escalation in TUN/TAP virtual device. The length of packet fragments to be sent wasn't validated before use, leading to heap overflow. A user having access to TUN/TAP virtual device could use this flaw to crash the system or to potentially escalate their privileges. * CVE-2012-2137: Buffer overflow in KVM MSI routing entry handler. A buffer overflow flaw was found in the setup_routing_entry() function in the KVM subsystem of the Linux kernel in the way the Message Signaled Interrupts (MSI) routing entry was handled. A local, unprivileged user could use this flaw to cause a denial of service or, possibly, escalate their privileges. * CVE-2012-1179 and CVE-2012-2373: Hugepage denial of service. CVE-2012-1179: Denial of service in page mapping of the hugepage subsystem. In some cases, the hugepage subsystem would allocate new PMDs when not expected by the memory management subsystem. A privileged user in the KVM guest can use this flaw to crash the host, an unprivileged local user could use this flaw to crash the system. CVE-2012-2373: Denial of service in PAE page tables. On a PAE system, a non-atomic load could be corrupted by a page fault resulting in a kernel crash, triggerable by an unprivileged user. * Regression in handling of bind() with AF_UNSPEC family sockets. Legacy applications used to bind() with AF_UNSPEC instead of AF_INET. Allow them to continue doing so, but verify that the address is indeed INADDR_ANY. kernel-uek: [2.6.32-300.27.1.el6uek] - net: sock: validate data_len before allocating skb (Jason Wang) [Bugdb: 13966]{CVE-2012-2136} - fcaps: clear the same personality flags as suid when fcaps are used (Eric Paris) [Bugdb: 13966] {CVE-2012-2123} - Revert 'nfs: when attempting to open a directory, fall back on normal lookup (Todd Vierling) [Orabug 14141154] [2.6.32-300.26.1.el6uek] - mptsas: do not call __mptsas_probe in kthread (Maxim Uvarov) [Orabug: 14175509] - mm: check if any page in a pageblock is reserved before marking it MIGRATE_RESERVE (Maxim Uvarov) [Orabug: 14073214] - mm: reduce the amount of work done when updating min_free_kbytes (Mel Gorman) [Orabug: 14073214] - vmxnet3: Updated to el6-u2 (Guangyu Sun) [Orabug: 14027961] - xen: expose host uuid via sysfs. (Zhigang Wang) - sched: Fix cgroup movement of waking process (Daisuke Nishimura) [Orabug: 13946210] - sched: Fix cgroup movement of newly created process (Daisuke Nishimura) [Orabug: 13946210] - sched: Fix cgroup movement of forking process (Daisuke Nishimura) [Orabug: 13946210] - x86, boot: Wait for boot cpu to show up if nr_cpus limit is about to hit (Zhenzhong Duan) [Orabug: 13629087] - smp: Use nr_cpus= to set nr_cpu_ids early (Zhenzhong Duan) [Orabug: 13629087] - net: ipv4: relax AF_INET check in bind() (Maxim Uvarov) [Orabug: 14054411] ofa-2.6.32-300.27.1.el6uek: [1.5.1-4.0.58] - Add Patch 158-169" ); script_set_attribute( attribute:"see_also", value:"https://oss.oracle.com/pipermail/el-errata/2012-June/002870.html" ); script_set_attribute( attribute:"see_also", value:"https://oss.oracle.com/pipermail/el-errata/2012-June/002871.html" ); script_set_attribute( attribute:"solution", value:"Update the affected unbreakable enterprise kernel packages." ); script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek-debug"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek-debug-devel"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek-devel"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek-doc"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek-firmware"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek-headers"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:mlnx_en-2.6.32-300.27.1.el5uek"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:mlnx_en-2.6.32-300.27.1.el5uekdebug"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:mlnx_en-2.6.32-300.27.1.el6uek"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:mlnx_en-2.6.32-300.27.1.el6uekdebug"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:ofa-2.6.32-300.27.1.el5uek"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:ofa-2.6.32-300.27.1.el5uekdebug"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:ofa-2.6.32-300.27.1.el6uek"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:ofa-2.6.32-300.27.1.el6uekdebug"); script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:5"); script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:6"); script_set_attribute(attribute:"vuln_publication_date", value:"2012/05/17"); script_set_attribute(attribute:"patch_publication_date", value:"2012/06/21"); script_set_attribute(attribute:"plugin_publication_date", value:"2013/07/12"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2013-2019 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"Oracle Linux Local Security Checks"); script_dependencies("ssh_get_info.nasl", "linux_alt_patch_detect.nasl"); script_require_keys("Host/local_checks_enabled", "Host/OracleLinux", "Host/RedHat/release", "Host/RedHat/rpm-list"); exit(0); } include("audit.inc"); include("global_settings.inc"); include("rpm.inc"); include("ksplice.inc"); if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED); if (!get_kb_item("Host/OracleLinux")) audit(AUDIT_OS_NOT, "Oracle Linux"); release = get_kb_item("Host/RedHat/release"); if (isnull(release) || !pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux)", string:release)) audit(AUDIT_OS_NOT, "Oracle Linux"); os_ver = pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux) .*release ([0-9]+(\.[0-9]+)?)", string:release); if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Oracle Linux"); os_ver = os_ver[1]; if (! preg(pattern:"^(5|6)([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Oracle Linux 5 / 6", "Oracle Linux " + os_ver); if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); cpu = get_kb_item("Host/cpu"); if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH); if ("x86_64" >!< cpu && "ia64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Oracle Linux", cpu); if (get_one_kb_item("Host/ksplice/kernel-cves")) { rm_kb_item(name:"Host/uptrack-uname-r"); cve_list = make_list("CVE-2012-1179", "CVE-2012-2121", "CVE-2012-2123", "CVE-2012-2136", "CVE-2012-2137", "CVE-2012-2373"); if (ksplice_cves_check(cve_list)) { audit(AUDIT_PATCH_INSTALLED, "KSplice hotfix for ELSA-2012-2020"); } else { __rpm_report = ksplice_reporting_text(); } } kernel_major_minor = get_kb_item("Host/uname/major_minor"); if (empty_or_null(kernel_major_minor)) exit(1, "Unable to determine kernel major-minor level."); expected_kernel_major_minor = "2.6"; if (kernel_major_minor != expected_kernel_major_minor) audit(AUDIT_OS_NOT, "running kernel level " + expected_kernel_major_minor + ", it is running kernel level " + kernel_major_minor); flag = 0; if (rpm_exists(release:"EL5", rpm:"kernel-uek-2.6.32") && rpm_check(release:"EL5", reference:"kernel-uek-2.6.32-300.27.1.el5uek")) flag++; if (rpm_exists(release:"EL5", rpm:"kernel-uek-debug-2.6.32") && rpm_check(release:"EL5", reference:"kernel-uek-debug-2.6.32-300.27.1.el5uek")) flag++; if (rpm_exists(release:"EL5", rpm:"kernel-uek-debug-devel-2.6.32") && rpm_check(release:"EL5", reference:"kernel-uek-debug-devel-2.6.32-300.27.1.el5uek")) flag++; if (rpm_exists(release:"EL5", rpm:"kernel-uek-devel-2.6.32") && rpm_check(release:"EL5", reference:"kernel-uek-devel-2.6.32-300.27.1.el5uek")) flag++; if (rpm_exists(release:"EL5", rpm:"kernel-uek-doc-2.6.32") && rpm_check(release:"EL5", reference:"kernel-uek-doc-2.6.32-300.27.1.el5uek")) flag++; if (rpm_exists(release:"EL5", rpm:"kernel-uek-firmware-2.6.32") && rpm_check(release:"EL5", reference:"kernel-uek-firmware-2.6.32-300.27.1.el5uek")) flag++; if (rpm_exists(release:"EL5", rpm:"kernel-uek-headers-2.6.32") && rpm_check(release:"EL5", reference:"kernel-uek-headers-2.6.32-300.27.1.el5uek")) flag++; if (rpm_check(release:"EL5", reference:"mlnx_en-2.6.32-300.27.1.el5uek-1.5.7-2")) flag++; if (rpm_check(release:"EL5", reference:"mlnx_en-2.6.32-300.27.1.el5uekdebug-1.5.7-2")) flag++; if (rpm_check(release:"EL5", reference:"ofa-2.6.32-300.27.1.el5uek-1.5.1-4.0.58")) flag++; if (rpm_check(release:"EL5", reference:"ofa-2.6.32-300.27.1.el5uekdebug-1.5.1-4.0.58")) flag++; if (rpm_exists(release:"EL6", rpm:"kernel-uek-2.6.32") && rpm_check(release:"EL6", reference:"kernel-uek-2.6.32-300.27.1.el6uek")) flag++; if (rpm_exists(release:"EL6", rpm:"kernel-uek-debug-2.6.32") && rpm_check(release:"EL6", reference:"kernel-uek-debug-2.6.32-300.27.1.el6uek")) flag++; if (rpm_exists(release:"EL6", rpm:"kernel-uek-debug-devel-2.6.32") && rpm_check(release:"EL6", reference:"kernel-uek-debug-devel-2.6.32-300.27.1.el6uek")) flag++; if (rpm_exists(release:"EL6", rpm:"kernel-uek-devel-2.6.32") && rpm_check(release:"EL6", reference:"kernel-uek-devel-2.6.32-300.27.1.el6uek")) flag++; if (rpm_exists(release:"EL6", rpm:"kernel-uek-doc-2.6.32") && rpm_check(release:"EL6", reference:"kernel-uek-doc-2.6.32-300.27.1.el6uek")) flag++; if (rpm_exists(release:"EL6", rpm:"kernel-uek-firmware-2.6.32") && rpm_check(release:"EL6", reference:"kernel-uek-firmware-2.6.32-300.27.1.el6uek")) flag++; if (rpm_exists(release:"EL6", rpm:"kernel-uek-headers-2.6.32") && rpm_check(release:"EL6", reference:"kernel-uek-headers-2.6.32-300.27.1.el6uek")) flag++; if (rpm_check(release:"EL6", reference:"mlnx_en-2.6.32-300.27.1.el6uek-1.5.7-0.1")) flag++; if (rpm_check(release:"EL6", reference:"mlnx_en-2.6.32-300.27.1.el6uekdebug-1.5.7-0.1")) flag++; if (rpm_check(release:"EL6", reference:"ofa-2.6.32-300.27.1.el6uek-1.5.1-4.0.58")) flag++; if (rpm_check(release:"EL6", reference:"ofa-2.6.32-300.27.1.el6uekdebug-1.5.1-4.0.58")) flag++; if (flag) { if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get()); else security_hole(0); exit(0); } else { tested = pkg_tests_get(); if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested); else audit(AUDIT_PACKAGE_NOT_INSTALLED, "affected kernel"); }NASL family Fedora Local Security Checks NASL id FEDORA_2012-6406.NASL description Fixes CVEs : CVE-2012-2123 CVE-2012-2121 CVE-2012-2119 Also fixes a boot regression on some Dell machines Linux 3.3.2 There was a regression at the DVB core, affecting applications that require the DVB status before having a lock. In order to allow a broader test (including my environment). All new patches from the upstream media tree up to Apr, 10 got backported plus the fix patches, in order to have, among other things, the az6007 and af9035 drivers backported. Various bugfixes. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-03-17 modified 2012-04-26 plugin id 58881 published 2012-04-26 reporter This script is Copyright (C) 2012-2020 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/58881 title Fedora 15 : kernel-2.6.43.2-6.fc15 (2012-6406) code #%NASL_MIN_LEVEL 80502 # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Fedora Security Advisory 2012-6406. # include("compat.inc"); if (description) { script_id(58881); script_version("1.9"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12"); script_cve_id("CVE-2012-2119", "CVE-2012-2121", "CVE-2012-2123"); script_xref(name:"FEDORA", value:"2012-6406"); script_name(english:"Fedora 15 : kernel-2.6.43.2-6.fc15 (2012-6406)"); script_summary(english:"Checks rpm output for the updated package."); script_set_attribute( attribute:"synopsis", value:"The remote Fedora host is missing a security update." ); script_set_attribute( attribute:"description", value: "Fixes CVEs : CVE-2012-2123 CVE-2012-2121 CVE-2012-2119 Also fixes a boot regression on some Dell machines Linux 3.3.2 There was a regression at the DVB core, affecting applications that require the DVB status before having a lock. In order to allow a broader test (including my environment). All new patches from the upstream media tree up to Apr, 10 got backported plus the fix patches, in order to have, among other things, the az6007 and af9035 drivers backported. Various bugfixes. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues." ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=806722" ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=814149" ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=814278" ); # https://lists.fedoraproject.org/pipermail/package-announce/2012-April/079111.html script_set_attribute( attribute:"see_also", value:"http://www.nessus.org/u?be6eb799" ); script_set_attribute( attribute:"solution", value:"Update the affected kernel package." ); script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:kernel"); script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:15"); script_set_attribute(attribute:"patch_publication_date", value:"2012/04/22"); script_set_attribute(attribute:"plugin_publication_date", value:"2012/04/26"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2012-2020 Tenable Network Security, Inc."); script_family(english:"Fedora Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list"); exit(0); } include("audit.inc"); include("global_settings.inc"); include("rpm.inc"); if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED); release = get_kb_item("Host/RedHat/release"); if (isnull(release) || "Fedora" >!< release) audit(AUDIT_OS_NOT, "Fedora"); os_ver = eregmatch(pattern: "Fedora.*release ([0-9]+)", string:release); if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora"); os_ver = os_ver[1]; if (! ereg(pattern:"^15([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 15.x", "Fedora " + os_ver); if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); cpu = get_kb_item("Host/cpu"); if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH); if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Fedora", cpu); flag = 0; if (rpm_check(release:"FC15", reference:"kernel-2.6.43.2-6.fc15")) flag++; if (flag) { if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get()); else security_hole(0); exit(0); } else { tested = pkg_tests_get(); if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested); else audit(AUDIT_PACKAGE_NOT_INSTALLED, "kernel"); }NASL family Scientific Linux Local Security Checks NASL id SL_20120618_KERNEL_ON_SL6_X.NASL description The kernel packages contain the Linux kernel, the core of any Linux operating system. This update fixes the following security issues : - 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. (CVE-2012-0044, Important) - 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 (Kernel-based Virtual Machine) 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 (it is not enabled by default), and that also have macvtap configured for at least one guest. (CVE-2012-2119, Important) - When a set user ID (setuid) application is executed, certain personality flags for controlling the application last seen 2020-03-18 modified 2012-08-01 plugin id 61331 published 2012-08-01 reporter This script is Copyright (C) 2012-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/61331 title Scientific Linux Security Update : kernel on SL6.x i386/x86_64 (20120618) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-2037-1.NASL description A flaw was discovered in the Linux kernel last seen 2020-06-01 modified 2020-06-02 plugin id 71204 published 2013-12-04 reporter Ubuntu Security Notice (C) 2013-2019 Canonical, Inc. / NASL script (C) 2013-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/71204 title Ubuntu 10.04 LTS : linux-ec2 vulnerabilities (USN-2037-1) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-1472-1.NASL description Andy Adamson discovered a flaw in the Linux kernel last seen 2020-06-01 modified 2020-06-02 plugin id 59476 published 2012-06-13 reporter Ubuntu Security Notice (C) 2012-2019 Canonical, Inc. / NASL script (C) 2012-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/59476 title Ubuntu 11.10 : linux vulnerabilities (USN-1472-1) NASL family Fedora Local Security Checks NASL id FEDORA_2012-6386.NASL description Fixes CVEs : CVE-2012-2123 CVE-2012-2121 CVE-2012-2119 Also fixes a boot regression on some Dell machines. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-03-17 modified 2012-04-25 plugin id 58862 published 2012-04-25 reporter This script is Copyright (C) 2012-2020 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/58862 title Fedora 16 : kernel-3.3.2-6.fc16 (2012-6386) NASL family CentOS Local Security Checks NASL id CENTOS_RHSA-2012-0743.NASL description Updated kernel packages that fix multiple security issues and several bugs are now available for Red Hat Enterprise Linux 6. The Red Hat Security Response Team has rated this update as having important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. The kernel packages contain the Linux kernel, the core of any Linux operating system. This update fixes the following security issues : * 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. (CVE-2012-0044, Important) * 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 (Kernel-based Virtual Machine) 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 (it is not enabled by default), and that also have macvtap configured for at least one guest. (CVE-2012-2119, Important) * When a set user ID (setuid) application is executed, certain personality flags for controlling the application last seen 2020-06-01 modified 2020-06-02 plugin id 59609 published 2012-06-21 reporter This script is Copyright (C) 2012-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/59609 title CentOS 6 : kernel (CESA-2012:0743) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-1577-1.NASL description A flaw was discovered in the Linux kernel last seen 2020-06-01 modified 2020-06-02 plugin id 62238 published 2012-09-24 reporter Ubuntu Security Notice (C) 2012 Canonical, Inc. / NASL script (C) 2012-2016 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/62238 title USN-1577-1 : linux-ti-omap4 vulnerabilities NASL family Oracle Linux Local Security Checks NASL id ORACLELINUX_ELSA-2012-0676.NASL description From Red Hat Security Advisory 2012:0676 : Updated kvm packages that fix two security issues and one bug are now available for Red Hat Enterprise Linux 5. The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on AMD64 and Intel 64 systems. KVM is a Linux kernel module built for the standard Red Hat Enterprise Linux kernel. A flaw was found in the way the KVM_CREATE_IRQCHIP ioctl was handled. Calling this ioctl when at least one virtual CPU (VCPU) already existed could lead to a NULL pointer dereference later when the VCPU is scheduled to run. A malicious user in the kvm group on the host could use this flaw to crash the host. (CVE-2012-1601) A flaw was found in the way device memory was handled during guest device removal. Upon successful device removal, memory used by the device was not properly unmapped from the corresponding IOMMU or properly released from the kernel, leading to a memory leak. A malicious user in the kvm group on the host who has the ability to assign a device to a guest could use this flaw to crash the host. (CVE-2012-2121) This update also fixes the following bug : * An off-by-one error in the QEMU guest last seen 2020-06-01 modified 2020-06-02 plugin id 68527 published 2013-07-12 reporter This script is Copyright (C) 2013-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/68527 title Oracle Linux 5 : kvm (ELSA-2012-0676) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-1457-1.NASL description Andy Adamson discovered a flaw in the Linux kernel last seen 2020-06-01 modified 2020-06-02 plugin id 59321 published 2012-06-01 reporter Ubuntu Security Notice (C) 2012-2019 Canonical, Inc. / NASL script (C) 2012-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/59321 title Ubuntu 11.04 : linux vulnerabilities (USN-1457-1) NASL family OracleVM Local Security Checks NASL id ORACLEVM_OVMSA-2012-0042.NASL description The remote OracleVM system is missing necessary patches to address critical security updates : - Fix bug number for commit last seen 2020-06-01 modified 2020-06-02 plugin id 79484 published 2014-11-26 reporter This script is Copyright (C) 2014-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/79484 title OracleVM 3.1 : kernel-uek (OVMSA-2012-0042) NASL family Oracle Linux Local Security Checks NASL id ORACLELINUX_ELSA-2012-0743.NASL description From Red Hat Security Advisory 2012:0743 : Updated kernel packages that fix multiple security issues and several bugs are now available for Red Hat Enterprise Linux 6. The Red Hat Security Response Team has rated this update as having important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. The kernel packages contain the Linux kernel, the core of any Linux operating system. This update fixes the following security issues : * 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. (CVE-2012-0044, Important) * 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 (Kernel-based Virtual Machine) 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 (it is not enabled by default), and that also have macvtap configured for at least one guest. (CVE-2012-2119, Important) * When a set user ID (setuid) application is executed, certain personality flags for controlling the application last seen 2020-06-01 modified 2020-06-02 plugin id 68544 published 2013-07-12 reporter This script is Copyright (C) 2013-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/68544 title Oracle Linux 6 : kernel (ELSA-2012-0743) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-1476-1.NASL description Andy Adamson discovered a flaw in the Linux kernel last seen 2020-06-01 modified 2020-06-02 plugin id 59553 published 2012-06-18 reporter Ubuntu Security Notice (C) 2012 Canonical, Inc. / NASL script (C) 2012-2016 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/59553 title USN-1476-1 : linux-ti-omap4 vulnerabilities NASL family Debian Local Security Checks NASL id DEBIAN_DSA-2668.NASL description Several vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service, information leak or privilege escalation. The Common Vulnerabilities and Exposures project identifies the following problems : - CVE-2012-2121 Benjamin Herrenschmidt and Jason Baron discovered issues with the IOMMU mapping of memory slots used in KVM device assignment. Local users with the ability to assign devices could cause a denial of service due to a memory page leak. - CVE-2012-3552 Hafid Lin reported an issue in the IP networking subsystem. A remote user can cause a denial of service (system crash) on servers running applications that set options on sockets which are actively being processed. - CVE-2012-4461 Jon Howell reported a denial of service issue in the KVM subsystem. On systems that do not support the XSAVE feature, local users with access to the /dev/kvm interface can cause a system crash. - CVE-2012-4508 Dmitry Monakhov and Theodore Ts last seen 2020-03-17 modified 2013-05-15 plugin id 66431 published 2013-05-15 reporter This script is Copyright (C) 2013-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/66431 title Debian DSA-2668-1 : linux-2.6 - privilege escalation/denial of service/information leak NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-1473-1.NASL description A flaw was discovered in the Linux kernel last seen 2020-06-01 modified 2020-06-02 plugin id 59495 published 2012-06-14 reporter Ubuntu Security Notice (C) 2012-2019 Canonical, Inc. / NASL script (C) 2012-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/59495 title Ubuntu 12.04 LTS : linux vulnerabilities (USN-1473-1) NASL family Oracle Linux Local Security Checks NASL id ORACLELINUX_ELSA-2012-2021.NASL description Description of changes: * CVE-2012-2123: Privilege escalation when assigning permissions using fcaps. If a process increases permissions using fcaps, all of the dangerous personality flags which are cleared for suid apps are not cleared. This has allowed programs that gained elevated permissions using fcaps to disable the address space randomization of other processes. * CVE-2012-2121: Memory leak in KVM device assignment. KVM uses memory slots to track and map guest regions of memory. When device assignment is used, the pages backing these slots are pinned in memory and mapped into the iommu. The problem is that when a memory slot is destroyed the pages for the associated memory slot are neither unpinned nor unmapped from the iommu. * Memory corruption in KVM device assignment slot handling. A race condition in the KVM device assignment slot handling caused by missing locks around the unmapping of memory slots could cause a memory corruption. * CVE-2012-2136: Privilege escalation in TUN/TAP virtual device. The length of packet fragments to be sent wasn last seen 2020-06-01 modified 2020-06-02 plugin id 68676 published 2013-07-12 reporter This script is Copyright (C) 2013-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/68676 title Oracle Linux 5 / 6 : Unbreakable Enterprise kernel (ELSA-2012-2021) NASL family Fedora Local Security Checks NASL id FEDORA_2012-6344.NASL description Fixes CVEs : CVE-2012-2119 CVE-2012-2123 CVE-2012-2121 Also fixes some fail to boot issues on various Dell machines. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-03-17 modified 2012-04-24 plugin id 58836 published 2012-04-24 reporter This script is Copyright (C) 2012-2020 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/58836 title Fedora 17 : kernel-3.3.2-8.fc17 (2012-6344) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-1471-1.NASL description Andy Adamson discovered a flaw in the Linux kernel last seen 2020-06-01 modified 2020-06-02 plugin id 59475 published 2012-06-13 reporter Ubuntu Security Notice (C) 2012-2019 Canonical, Inc. / NASL script (C) 2012-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/59475 title Ubuntu 10.04 LTS : linux-lts-backport-oneiric vulnerabilities (USN-1471-1) NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2012-0743.NASL description Updated kernel packages that fix multiple security issues and several bugs are now available for Red Hat Enterprise Linux 6. The Red Hat Security Response Team has rated this update as having important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. The kernel packages contain the Linux kernel, the core of any Linux operating system. This update fixes the following security issues : * 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. (CVE-2012-0044, Important) * 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 (Kernel-based Virtual Machine) 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 (it is not enabled by default), and that also have macvtap configured for at least one guest. (CVE-2012-2119, Important) * When a set user ID (setuid) application is executed, certain personality flags for controlling the application last seen 2020-06-01 modified 2020-06-02 plugin id 59562 published 2012-06-19 reporter This script is Copyright (C) 2012-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/59562 title RHEL 6 : kernel (RHSA-2012:0743) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-1470-1.NASL description Andy Adamson discovered a flaw in the Linux kernel last seen 2020-06-01 modified 2020-06-02 plugin id 59474 published 2012-06-13 reporter Ubuntu Security Notice (C) 2012-2019 Canonical, Inc. / NASL script (C) 2012-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/59474 title Ubuntu 10.04 LTS : linux-lts-backport-natty vulnerabilities (USN-1470-1) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-2036-1.NASL description A flaw was discovered in the Linux kernel last seen 2020-06-01 modified 2020-06-02 plugin id 71203 published 2013-12-04 reporter Ubuntu Security Notice (C) 2013-2019 Canonical, Inc. / NASL script (C) 2013-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/71203 title Ubuntu 10.04 LTS : linux vulnerabilities (USN-2036-1) NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2012-0676.NASL description Updated kvm packages that fix two security issues and one bug are now available for Red Hat Enterprise Linux 5. The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on AMD64 and Intel 64 systems. KVM is a Linux kernel module built for the standard Red Hat Enterprise Linux kernel. A flaw was found in the way the KVM_CREATE_IRQCHIP ioctl was handled. Calling this ioctl when at least one virtual CPU (VCPU) already existed could lead to a NULL pointer dereference later when the VCPU is scheduled to run. A malicious user in the kvm group on the host could use this flaw to crash the host. (CVE-2012-1601) A flaw was found in the way device memory was handled during guest device removal. Upon successful device removal, memory used by the device was not properly unmapped from the corresponding IOMMU or properly released from the kernel, leading to a memory leak. A malicious user in the kvm group on the host who has the ability to assign a device to a guest could use this flaw to crash the host. (CVE-2012-2121) This update also fixes the following bug : * An off-by-one error in the QEMU guest last seen 2020-06-01 modified 2020-06-02 plugin id 64037 published 2013-01-24 reporter This script is Copyright (C) 2013-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/64037 title RHEL 5 : kvm (RHSA-2012:0676) NASL family CentOS Local Security Checks NASL id CENTOS_RHSA-2012-0676.NASL description Updated kvm packages that fix two security issues and one bug are now available for Red Hat Enterprise Linux 5. The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on AMD64 and Intel 64 systems. KVM is a Linux kernel module built for the standard Red Hat Enterprise Linux kernel. A flaw was found in the way the KVM_CREATE_IRQCHIP ioctl was handled. Calling this ioctl when at least one virtual CPU (VCPU) already existed could lead to a NULL pointer dereference later when the VCPU is scheduled to run. A malicious user in the kvm group on the host could use this flaw to crash the host. (CVE-2012-1601) A flaw was found in the way device memory was handled during guest device removal. Upon successful device removal, memory used by the device was not properly unmapped from the corresponding IOMMU or properly released from the kernel, leading to a memory leak. A malicious user in the kvm group on the host who has the ability to assign a device to a guest could use this flaw to crash the host. (CVE-2012-2121) This update also fixes the following bug : * An off-by-one error in the QEMU guest last seen 2020-06-01 modified 2020-06-02 plugin id 59212 published 2012-05-22 reporter This script is Copyright (C) 2012-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/59212 title CentOS 5 : kvm (CESA-2012:0676) NASL family Scientific Linux Local Security Checks NASL id SL_20120521_KVM_ON_SL5_X.NASL description KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on AMD64 and Intel 64 systems. KVM is a Linux kernel module built for the standard Scientific Linux kernel. A flaw was found in the way the KVM_CREATE_IRQCHIP ioctl was handled. Calling this ioctl when at least one virtual CPU (VCPU) already existed could lead to a NULL pointer dereference later when the VCPU is scheduled to run. A malicious user in the kvm group on the host could use this flaw to crash the host. (CVE-2012-1601) A flaw was found in the way device memory was handled during guest device removal. Upon successful device removal, memory used by the device was not properly unmapped from the corresponding IOMMU or properly released from the kernel, leading to a memory leak. A malicious user in the kvm group on the host who has the ability to assign a device to a guest could use this flaw to crash the host. (CVE-2012-2121) This update also fixes the following bug : - An off-by-one error in the QEMU guest last seen 2020-03-18 modified 2012-08-01 plugin id 61315 published 2012-08-01 reporter This script is Copyright (C) 2012-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/61315 title Scientific Linux Security Update : kvm on SL5.x x86_64 (20120521) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-1474-1.NASL description A flaw was discovered in the Linux kernel last seen 2020-06-01 modified 2020-06-02 plugin id 59496 published 2012-06-14 reporter Ubuntu Security Notice (C) 2012 Canonical, Inc. / NASL script (C) 2012-2016 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/59496 title USN-1474-1 : linux-ti-omap4 vulnerabilities
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References
- http://rhn.redhat.com/errata/RHSA-2012-0676.html
- http://rhn.redhat.com/errata/RHSA-2012-0743.html
- http://secunia.com/advisories/50732
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.3.4
- http://www.openwall.com/lists/oss-security/2012/04/19/16
- http://www.securitytracker.com/id?1027083
- http://www.ubuntu.com/usn/USN-1577-1
- http://www.ubuntu.com/usn/USN-2036-1
- http://www.ubuntu.com/usn/USN-2037-1
- https://bugzilla.redhat.com/show_bug.cgi?id=814149
- https://github.com/torvalds/linux/commit/09ca8e1173bcb12e2a449698c9ae3b86a8a10195