Vulnerabilities > CVE-2009-3640 - Improper Input Validation vulnerability in Linux Kernel

047910
CVSS 0.0 - NONE
Attack vector
UNKNOWN
Attack complexity
UNKNOWN
Privileges required
UNKNOWN
Confidentiality impact
UNKNOWN
Integrity impact
UNKNOWN
Availability impact
UNKNOWN

Summary

The update_cr8_intercept function in arch/x86/kvm/x86.c in the KVM subsystem in the Linux kernel before 2.6.32-rc1 does not properly handle the absence of an Advanced Programmable Interrupt Controller (APIC), which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly gain privileges via a call to the kvm_vcpu_ioctl function.

Vulnerable Configurations

Part Description Count
OS
Linux
345

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Server Side Include (SSI) Injection
    An attacker can use Server Side Include (SSI) Injection to send code to a web application that then gets executed by the web server. Doing so enables the attacker to achieve similar results to Cross Site Scripting, viz., arbitrary code execution and information disclosure, albeit on a more limited scale, since the SSI directives are nowhere near as powerful as a full-fledged scripting language. Nonetheless, the attacker can conveniently gain access to sensitive files, such as password files, and execute shell commands.
  • Cross Zone Scripting
    An attacker is able to cause a victim to load content into their web-browser that bypasses security zone controls and gain access to increased privileges to execute scripting code or other web objects such as unsigned ActiveX controls or applets. This is a privilege elevation attack targeted at zone-based web-browser security. In a zone-based model, pages belong to one of a set of zones corresponding to the level of privilege assigned to that page. Pages in an untrusted zone would have a lesser level of access to the system and/or be restricted in the types of executable content it was allowed to invoke. In a cross-zone scripting attack, a page that should be assigned to a less privileged zone is granted the privileges of a more trusted zone. This can be accomplished by exploiting bugs in the browser, exploiting incorrect configuration in the zone controls, through a cross-site scripting attack that causes the attackers' content to be treated as coming from a more trusted page, or by leveraging some piece of system functionality that is accessible from both the trusted and less trusted zone. This attack differs from "Restful Privilege Escalation" in that the latter correlates to the inadequate securing of RESTful access methods (such as HTTP DELETE) on the server, while cross-zone scripting attacks the concept of security zones as implemented by a browser.
  • Cross Site Scripting through Log Files
    An attacker may leverage a system weakness where logs are susceptible to log injection to insert scripts into the system's logs. If these logs are later viewed by an administrator through a thin administrative interface and the log data is not properly HTML encoded before being written to the page, the attackers' scripts stored in the log will be executed in the administrative interface with potentially serious consequences. This attack pattern is really a combination of two other attack patterns: log injection and stored cross site scripting.
  • Command Line Execution through SQL Injection
    An attacker uses standard SQL injection methods to inject data into the command line for execution. This could be done directly through misuse of directives such as MSSQL_xp_cmdshell or indirectly through injection of data into the database that would be interpreted as shell commands. Sometime later, an unscrupulous backend application (or could be part of the functionality of the same application) fetches the injected data stored in the database and uses this data as command line arguments without performing proper validation. The malicious data escapes that data plane by spawning new commands to be executed on the host.

Nessus

  • NASL familySuSE Local Security Checks
    NASL idSUSE_11_1_KVM-091113.NASL
    descriptionThis update of QEMU KVM fixes the following bugs : - CVE-2009-3616: CVSS v2 Base Score: 8.5 use-after-free bug in VNC code which might be used to execute code on the host system injected from the guest system - CVE-2009-3638: CVSS v2 Base Score: 7.2 integer overflow in kvm_dev_ioctl_get_supported_cpuid() - CVE-2009-3640: CVSS v2 Base Score: 2.1 update_cr8_intercept() NULL pointer dereference
    last seen2020-06-01
    modified2020-06-02
    plugin id42865
    published2009-11-23
    reporterThis script is Copyright (C) 2009-2019 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/42865
    titleopenSUSE Security Update : kvm (kvm-1545)
    code
    #%NASL_MIN_LEVEL 80502
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were
    # extracted from openSUSE Security Update kvm-1545.
    #
    # The text description of this plugin is (C) SUSE LLC.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(42865);
      script_version("1.9");
      script_cvs_date("Date: 2019/10/25 13:36:34");
    
      script_cve_id("CVE-2009-3616", "CVE-2009-3638", "CVE-2009-3640");
    
      script_name(english:"openSUSE Security Update : kvm (kvm-1545)");
      script_summary(english:"Check for the kvm-1545 patch");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:"The remote openSUSE host is missing a security update."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "This update of QEMU KVM fixes the following bugs :
    
      - CVE-2009-3616: CVSS v2 Base Score: 8.5 use-after-free
        bug in VNC code which might be used to execute code on
        the host system injected from the guest system
    
      - CVE-2009-3638: CVSS v2 Base Score: 7.2 integer overflow
        in kvm_dev_ioctl_get_supported_cpuid() 
    
      - CVE-2009-3640: CVSS v2 Base Score: 2.1
        update_cr8_intercept() NULL pointer dereference"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.novell.com/show_bug.cgi?id=540247"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.novell.com/show_bug.cgi?id=547555"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.novell.com/show_bug.cgi?id=547624"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.novell.com/show_bug.cgi?id=549487"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.novell.com/show_bug.cgi?id=550072"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.novell.com/show_bug.cgi?id=550732"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.novell.com/show_bug.cgi?id=550917"
      );
      script_set_attribute(attribute:"solution", value:"Update the affected kvm packages.");
      script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:S/C:C/I:C/A:C");
      script_cwe_id(20, 189, 399);
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:kvm");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:kvm-kmp-default");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:kvm-kmp-pae");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:kvm-kmp-trace");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:11.1");
    
      script_set_attribute(attribute:"patch_publication_date", value:"2009/11/13");
      script_set_attribute(attribute:"plugin_publication_date", value:"2009/11/23");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2009-2019 Tenable Network Security, Inc.");
      script_family(english:"SuSE Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/SuSE/release", "Host/SuSE/rpm-list", "Host/cpu");
    
      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/SuSE/release");
    if (isnull(release) || release =~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "openSUSE");
    if (release !~ "^(SUSE11\.1)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "11.1", release);
    if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
    
    ourarch = get_kb_item("Host/cpu");
    if (!ourarch) audit(AUDIT_UNKNOWN_ARCH);
    if (ourarch !~ "^(i586|i686|x86_64)$") audit(AUDIT_ARCH_NOT, "i586 / i686 / x86_64", ourarch);
    
    flag = 0;
    
    if ( rpm_check(release:"SUSE11.1", reference:"kvm-78.0.10.6-0.1.1") ) flag++;
    if ( rpm_check(release:"SUSE11.1", reference:"kvm-kmp-default-78.2.6.30.1_2.6.27.37_0.1-0.1.1") ) flag++;
    if ( rpm_check(release:"SUSE11.1", reference:"kvm-kmp-pae-78.2.6.30.1_2.6.27.37_0.1-0.1.1") ) flag++;
    if ( rpm_check(release:"SUSE11.1", reference:"kvm-kmp-trace-78.2.6.30.1_2.6.27.37_0.1-0.1.1") ) 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, "QEMU KVM");
    }
    
  • NASL familySuSE Local Security Checks
    NASL idSUSE_11_0_KVM-091113.NASL
    descriptionThis update of QEMU KVM fixes the following bugs : - CVE-2009-3616: CVSS v2 Base Score: 8.5 use-after-free bug in VNC code which might be used to execute code on the host system injected from the guest system - CVE-2009-3638: CVSS v2 Base Score: 7.2 integer overflow in kvm_dev_ioctl_get_supported_cpuid() - CVE-2009-3640: CVSS v2 Base Score: 2.1 update_cr8_intercept() NULL pointer dereference
    last seen2020-06-01
    modified2020-06-02
    plugin id42864
    published2009-11-23
    reporterThis script is Copyright (C) 2009-2019 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/42864
    titleopenSUSE Security Update : kvm (kvm-1547)
  • NASL familySuSE Local Security Checks
    NASL idSUSE_11_KVM-091116.NASL
    descriptionThis update of QEMU KVM fixes the following bugs : - use-after-free bug in VNC code which might be used to execute code on the host system injected from the guest system. (CVE-2009-3616: CVSS v2 Base Score: 8.5) - integer overflow in kvm_dev_ioctl_get_supported_cpuid(). (CVE-2009-3638: CVSS v2 Base Score: 7.2) - update_cr8_intercept() NULL pointer dereference. (CVE-2009-3640: CVSS v2 Base Score: 2.1)
    last seen2020-06-01
    modified2020-06-02
    plugin id42867
    published2009-11-23
    reporterThis script is Copyright (C) 2009-2019 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/42867
    titleSuSE 11 Security Update : KVM (SAT Patch Number 1553)

Statements

contributorTomas Hoger
lastmodified2009-10-30
organizationRed Hat
statementNot vulnerable. This issue did not affect the versions of KVM as shipped with Red Hat Enterprise Linux 5 as it does not contain the patch that introduced this vulnerability (upstream commit f0a3602c).