Vulnerabilities > CVE-2011-0011 - Improper Authentication vulnerability in Qemu

047910
CVSS 4.3 - MEDIUM
Attack vector
ADJACENT_NETWORK
Attack complexity
HIGH
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
PARTIAL
Availability impact
PARTIAL
high complexity
qemu
CWE-287
nessus
NVD
Published: 2012-06-21
Updated: 2020-11-02

Summary

qemu-kvm before 0.11.0 disables VNC authentication when the password is cleared, which allows remote attackers to bypass authentication and establish VNC sessions.

Vulnerable Configurations

Part Description Count
Application
Qemu
17

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Authentication Abuse
    An attacker obtains unauthorized access to an application, service or device either through knowledge of the inherent weaknesses of an authentication mechanism, or by exploiting a flaw in the authentication scheme's implementation. In such an attack an authentication mechanism is functioning but a carefully controlled sequence of events causes the mechanism to grant access to the attacker. This attack may exploit assumptions made by the target's authentication procedures, such as assumptions regarding trust relationships or assumptions regarding the generation of secret values. This attack differs from Authentication Bypass attacks in that Authentication Abuse allows the attacker to be certified as a valid user through illegitimate means, while Authentication Bypass allows the user to access protected material without ever being certified as an authenticated user. This attack does not rely on prior sessions established by successfully authenticating users, as relied upon for the "Exploitation of Session Variables, Resource IDs and other Trusted Credentials" attack patterns.
  • Exploiting Trust in Client (aka Make the Client Invisible)
    An attack of this type exploits a programs' vulnerabilities in client/server communication channel authentication and data integrity. It leverages the implicit trust a server places in the client, or more importantly, that which the server believes is the client. An attacker executes this type of attack by placing themselves in the communication channel between client and server such that communication directly to the server is possible where the server believes it is communicating only with a valid client. There are numerous variations of this type of attack.
  • Utilizing REST's Trust in the System Resource to Register Man in the Middle
    This attack utilizes a REST(REpresentational State Transfer)-style applications' trust in the system resources and environment to place man in the middle once SSL is terminated. Rest applications premise is that they leverage existing infrastructure to deliver web services functionality. An example of this is a Rest application that uses HTTP Get methods and receives a HTTP response with an XML document. These Rest style web services are deployed on existing infrastructure such as Apache and IIS web servers with no SOAP stack required. Unfortunately from a security standpoint, there frequently is no interoperable identity security mechanism deployed, so Rest developers often fall back to SSL to deliver security. In large data centers, SSL is typically terminated at the edge of the network - at the firewall, load balancer, or router. Once the SSL is terminated the HTTP request is in the clear (unless developers have hashed or encrypted the values, but this is rare). The attacker can utilize a sniffer such as Wireshark to snapshot the credentials, such as username and password that are passed in the clear once SSL is terminated. Once the attacker gathers these credentials, they can submit requests to the web service provider just as authorized user do. There is not typically an authentication on the client side, beyond what is passed in the request itself so once this is compromised, then this is generally sufficient to compromise the service's authentication scheme.
  • Man in the Middle Attack
    This type of attack targets the communication between two components (typically client and server). The attacker places himself in the communication channel between the two components. Whenever one component attempts to communicate with the other (data flow, authentication challenges, etc.), the data first goes to the attacker, who has the opportunity to observe or alter it, and it is then passed on to the other component as if it was never intercepted. This interposition is transparent leaving the two compromised components unaware of the potential corruption or leakage of their communications. The potential for Man-in-the-Middle attacks yields an implicit lack of trust in communication or identify between two components.

Nessus

  • NASL familyScientific Linux Local Security Checks
    NASL idSL_20110310_QEMU_KVM_ON_SL6_X.NASL
    descriptionA flaw was found in the way the VNC
    last seen2020-06-01
    modified2020-06-02
    plugin id60989
    published2012-08-01
    reporterThis script is Copyright (C) 2012-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/60989
    titleScientific Linux Security Update : qemu-kvm on SL6.x x86_64
    code
    #%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text is (C) Scientific Linux.
#

include("compat.inc");

if (description)
{
  script_id(60989);
  script_version("1.4");
  script_cvs_date("Date: 2019/10/25 13:36:19");

  script_cve_id("CVE-2011-0011");

  script_name(english:"Scientific Linux Security Update : qemu-kvm on SL6.x x86_64");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Scientific Linux host is missing one or more security
updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"A flaw was found in the way the VNC 'password' option was handled.
Clearingaa password disabled VNC authentication, allowing a remote
user able to connect to the virtual machines' VNC ports to open a VNC
session without authentication. (CVE-2011-0011)

After installing this update, shut down all running virtual machines.
Once all virtual machines have shut down, start them again for this
update to take effect."
  );
  # https://listserv.fnal.gov/scripts/wa.exe?A2=ind1103&L=scientific-linux-errata&T=0&P=8539
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?eced0df4"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Update the affected qemu-img, qemu-kvm and / or qemu-kvm-tools
packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:A/AC:H/Au:N/C:P/I:P/A:P");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"x-cpe:/o:fermilab:scientific_linux");

  script_set_attribute(attribute:"patch_publication_date", value:"2011/03/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2012/08/01");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2012-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Scientific Linux Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/cpu", "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) || "Scientific Linux " >!< release) audit(AUDIT_HOST_NOT, "running Scientific Linux");
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 (cpu >!< "x86_64" && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Scientific Linux", cpu);


flag = 0;
if (rpm_check(release:"SL6", cpu:"x86_64", reference:"qemu-img-0.12.1.2-2.113.el6_0.8")) flag++;
if (rpm_check(release:"SL6", cpu:"x86_64", reference:"qemu-kvm-0.12.1.2-2.113.el6_0.8")) flag++;
if (rpm_check(release:"SL6", cpu:"x86_64", reference:"qemu-kvm-tools-0.12.1.2-2.113.el6_0.8")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
  else security_warning(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
  • NASL familyRed Hat Local Security Checks
    NASL idREDHAT-RHSA-2011-0345.NASL
    descriptionUpdated qemu-kvm packages that fix one security issue are now available for Red Hat Enterprise Linux 6. The Red Hat Security Response Team has rated this update as having moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section. KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on AMD64 and Intel 64 systems. qemu-kvm is the user-space component for running virtual machines using KVM. Virtual Network Computing (VNC) is a remote display system. A flaw was found in the way the VNC
    last seen2020-06-01
    modified2020-06-02
    plugin id63974
    published2013-01-24
    reporterThis script is Copyright (C) 2013-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/63974
    titleRHEL 6 : qemu-kvm (RHSA-2011:0345)
    code
    #%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2011:0345. The text 
# itself is copyright (C) Red Hat, Inc.
#

include("compat.inc");

if (description)
{
  script_id(63974);
  script_version("1.14");
  script_cvs_date("Date: 2019/10/25 13:36:16");

  script_cve_id("CVE-2011-0011");
  script_bugtraq_id(45743);
  script_xref(name:"RHSA", value:"2011:0345");

  script_name(english:"RHEL 6 : qemu-kvm (RHSA-2011:0345)");
  script_summary(english:"Checks the rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Red Hat host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Updated qemu-kvm packages that fix one security issue are now
available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having
moderate security impact. A Common Vulnerability Scoring System (CVSS)
base score, which gives a detailed severity rating, is available from
the CVE link in the References section.

KVM (Kernel-based Virtual Machine) is a full virtualization solution
for Linux on AMD64 and Intel 64 systems. qemu-kvm is the user-space
component for running virtual machines using KVM. Virtual Network
Computing (VNC) is a remote display system.

A flaw was found in the way the VNC 'password' option was handled.
Clearing a password disabled VNC authentication, allowing a remote
user able to connect to the virtual machines' VNC ports to open a VNC
session without authentication. (CVE-2011-0011)

All users of qemu-kvm should upgrade to these updated packages, which
contain a backported patch to resolve this issue. After installing
this update, shut down all running virtual machines. Once all virtual
machines have shut down, start them again for this update to take
effect."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2011-0011"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/errata/RHSA-2011:0345"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:A/AC:H/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:qemu-img");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:qemu-kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:qemu-kvm-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:qemu-kvm-tools");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:6");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:6.0");

  script_set_attribute(attribute:"vuln_publication_date", value:"2012/06/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2011/03/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/01/24");
  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:"Red Hat Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/cpu");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("misc_func.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) || "Red Hat" >!< release) audit(AUDIT_OS_NOT, "Red Hat");
os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Red Hat");
os_ver = os_ver[1];
if (! preg(pattern:"^6([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 6.x", "Red Hat " + 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$" && "s390" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Red Hat", cpu);
if ("x86_64" >!< cpu) audit(AUDIT_ARCH_NOT, "x86_64", cpu);

yum_updateinfo = get_kb_item("Host/RedHat/yum-updateinfo");
if (!empty_or_null(yum_updateinfo)) 
{
  rhsa = "RHSA-2011:0345";
  yum_report = redhat_generate_yum_updateinfo_report(rhsa:rhsa);
  if (!empty_or_null(yum_report))
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : yum_report 
    );
    exit(0);
  }
  else
  {
    audit_message = "affected by Red Hat security advisory " + rhsa;
    audit(AUDIT_OS_NOT, audit_message);
  }
}
else
{
  flag = 0;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"qemu-img-0.12.1.2-2.113.el6_0.8")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"qemu-kvm-0.12.1.2-2.113.el6_0.8")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"qemu-kvm-debuginfo-0.12.1.2-2.113.el6_0.8")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"qemu-kvm-tools-0.12.1.2-2.113.el6_0.8")) flag++;


  if (flag)
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : rpm_report_get() + redhat_report_package_caveat()
    );
    exit(0);
  }
  else
  {
    tested = pkg_tests_get();
    if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
    else audit(AUDIT_PACKAGE_NOT_INSTALLED, "qemu-img / qemu-kvm / qemu-kvm-debuginfo / qemu-kvm-tools");
  }
}
  • NASL familyUbuntu Local Security Checks
    NASL idUBUNTU_USN-1063-1.NASL
    descriptionNeil Wilson discovered that if VNC passwords were blank in QEMU configurations, access to VNC sessions was allowed without a password instead of being disabled. A remote attacker could connect to running VNC sessions of QEMU and directly control the system. By default, QEMU does not start VNC sessions. Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id51986
    published2011-02-15
    reporterUbuntu Security Notice (C) 2011-2019 Canonical, Inc. / NASL script (C) 2011-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/51986
    titleUbuntu 9.10 / 10.04 LTS / 10.10 : qemu-kvm vulnerability (USN-1063-1)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-1063-1. The text 
# itself is copyright (C) Canonical, Inc. See 
# <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
# trademark of Canonical, Inc.
#

include("compat.inc");

if (description)
{
  script_id(51986);
  script_version("1.9");
  script_cvs_date("Date: 2019/09/19 12:54:26");

  script_cve_id("CVE-2011-0011");
  script_bugtraq_id(45743);
  script_xref(name:"USN", value:"1063-1");

  script_name(english:"Ubuntu 9.10 / 10.04 LTS / 10.10 : qemu-kvm vulnerability (USN-1063-1)");
  script_summary(english:"Checks dpkg output for updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Ubuntu host is missing one or more security-related
patches."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Neil Wilson discovered that if VNC passwords were blank in QEMU
configurations, access to VNC sessions was allowed without a password
instead of being disabled. A remote attacker could connect to running
VNC sessions of QEMU and directly control the system. By default, QEMU
does not start VNC sessions.

Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu 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://usn.ubuntu.com/1063-1/"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:A/AC:H/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:ND");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-arm-static");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-kvm-extras");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-kvm-extras-static");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:10.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:10.10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:9.10");

  script_set_attribute(attribute:"vuln_publication_date", value:"2012/06/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2011/02/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2011/02/15");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2011-2019 Canonical, Inc. / NASL script (C) 2011-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Ubuntu Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("ubuntu.inc");
include("misc_func.inc");

if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/Ubuntu/release");
if ( isnull(release) ) audit(AUDIT_OS_NOT, "Ubuntu");
release = chomp(release);
if (! preg(pattern:"^(9\.10|10\.04|10\.10)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 9.10 / 10.04 / 10.10", "Ubuntu " + release);
if ( ! get_kb_item("Host/Debian/dpkg-l") ) 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, "Ubuntu", cpu);

flag = 0;

if (ubuntu_check(osver:"9.10", pkgname:"kvm", pkgver:"0.11.0-0ubuntu6.4")) flag++;
if (ubuntu_check(osver:"9.10", pkgname:"qemu", pkgver:"0.11.0-0ubuntu6.4")) flag++;
if (ubuntu_check(osver:"9.10", pkgname:"qemu-arm-static", pkgver:"0.11.0-0ubuntu6.4")) flag++;
if (ubuntu_check(osver:"9.10", pkgname:"qemu-kvm", pkgver:"0.11.0-0ubuntu6.4")) flag++;
if (ubuntu_check(osver:"9.10", pkgname:"qemu-kvm-extras", pkgver:"0.11.0-0ubuntu6.4")) flag++;
if (ubuntu_check(osver:"10.04", pkgname:"kvm", pkgver:"0.12.3+noroms-0ubuntu9.4")) flag++;
if (ubuntu_check(osver:"10.04", pkgname:"qemu", pkgver:"0.12.3+noroms-0ubuntu9.4")) flag++;
if (ubuntu_check(osver:"10.04", pkgname:"qemu-arm-static", pkgver:"0.12.3+noroms-0ubuntu9.4")) flag++;
if (ubuntu_check(osver:"10.04", pkgname:"qemu-common", pkgver:"0.12.3+noroms-0ubuntu9.4")) flag++;
if (ubuntu_check(osver:"10.04", pkgname:"qemu-kvm", pkgver:"0.12.3+noroms-0ubuntu9.4")) flag++;
if (ubuntu_check(osver:"10.04", pkgname:"qemu-kvm-extras", pkgver:"0.12.3+noroms-0ubuntu9.4")) flag++;
if (ubuntu_check(osver:"10.04", pkgname:"qemu-kvm-extras-static", pkgver:"0.12.3+noroms-0ubuntu9.4")) flag++;
if (ubuntu_check(osver:"10.10", pkgname:"kvm", pkgver:"0.12.5+noroms-0ubuntu7.2")) flag++;
if (ubuntu_check(osver:"10.10", pkgname:"qemu", pkgver:"0.12.5+noroms-0ubuntu7.2")) flag++;
if (ubuntu_check(osver:"10.10", pkgname:"qemu-arm-static", pkgver:"0.12.5+noroms-0ubuntu7.2")) flag++;
if (ubuntu_check(osver:"10.10", pkgname:"qemu-common", pkgver:"0.12.5+noroms-0ubuntu7.2")) flag++;
if (ubuntu_check(osver:"10.10", pkgname:"qemu-kvm", pkgver:"0.12.5+noroms-0ubuntu7.2")) flag++;
if (ubuntu_check(osver:"10.10", pkgname:"qemu-kvm-extras", pkgver:"0.12.5+noroms-0ubuntu7.2")) flag++;
if (ubuntu_check(osver:"10.10", pkgname:"qemu-kvm-extras-static", pkgver:"0.12.5+noroms-0ubuntu7.2")) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : ubuntu_report_get()
  );
  exit(0);
}
else
{
  tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "kvm / qemu / qemu-arm-static / qemu-common / qemu-kvm / etc");
}
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DSA-2230.NASL
    descriptionTwo vulnerabilities have been discovered in KVM, a solution for full virtualization on x86 hardware : - CVE-2011-0011 Setting the VNC password to an empty string silently disabled all authentication. - CVE-2011-1750 The virtio-blk driver performed insufficient validation of read/write I/O from the guest instance, which could lead to denial of service or privilege escalation. The oldstable distribution (lenny) is not affected by this problem.
    last seen2020-03-17
    modified2011-05-02
    plugin id53605
    published2011-05-02
    reporterThis script is Copyright (C) 2011-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/53605
    titleDebian DSA-2230-1 : qemu-kvm - several vulnerabilities
    code
    #%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Debian Security Advisory DSA-2230. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(53605);
  script_version("1.10");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12");

  script_cve_id("CVE-2011-0011", "CVE-2011-1750");
  script_bugtraq_id(45743, 47546);
  script_xref(name:"DSA", value:"2230");

  script_name(english:"Debian DSA-2230-1 : qemu-kvm - several vulnerabilities");
  script_summary(english:"Checks dpkg output for the updated package");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Debian host is missing a security-related update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Two vulnerabilities have been discovered in KVM, a solution for full
virtualization on x86 hardware :

  - CVE-2011-0011
    Setting the VNC password to an empty string silently
    disabled all authentication.

  - CVE-2011-1750
    The virtio-blk driver performed insufficient validation
    of read/write I/O from the guest instance, which could
    lead to denial of service or privilege escalation.

The oldstable distribution (lenny) is not affected by this problem."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=611134"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=624177"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/CVE-2011-0011"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/CVE-2011-1750"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/squeeze/qemu-kvm"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.debian.org/security/2011/dsa-2230"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade the qemu-kvm packages.

For the stable distribution (squeeze), this problem has been fixed in
version 0.12.5+dfsg-5+squeeze1."
  );
  script_set_cvss_base_vector("CVSS2#AV:A/AC:M/Au:S/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:ND");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-kvm");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:6.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2011/05/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2011/05/02");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2011-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Debian Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("debian_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (deb_check(release:"6.0", prefix:"kvm", reference:"0.12.5+dfsg-5+squeeze1")) flag++;
if (deb_check(release:"6.0", prefix:"qemu-kvm", reference:"0.12.5+dfsg-5+squeeze1")) flag++;
if (deb_check(release:"6.0", prefix:"qemu-kvm-dbg", reference:"0.12.5+dfsg-5+squeeze1")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:deb_report_get());
  else security_hole(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
  • NASL familyOracle Linux Local Security Checks
    NASL idORACLELINUX_ELSA-2011-0345.NASL
    descriptionFrom Red Hat Security Advisory 2011:0345 : Updated qemu-kvm packages that fix one security issue are now available for Red Hat Enterprise Linux 6. The Red Hat Security Response Team has rated this update as having moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section. KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on AMD64 and Intel 64 systems. qemu-kvm is the user-space component for running virtual machines using KVM. Virtual Network Computing (VNC) is a remote display system. A flaw was found in the way the VNC
    last seen2020-06-01
    modified2020-06-02
    plugin id68227
    published2013-07-12
    reporterThis script is Copyright (C) 2013-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/68227
    titleOracle Linux 6 : qemu-kvm (ELSA-2011-0345)
    code
    #%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2011:0345 and 
# Oracle Linux Security Advisory ELSA-2011-0345 respectively.
#

include("compat.inc");

if (description)
{
  script_id(68227);
  script_version("1.7");
  script_cvs_date("Date: 2019/10/25 13:36:09");

  script_cve_id("CVE-2011-0011");
  script_bugtraq_id(45743);
  script_xref(name:"RHSA", value:"2011:0345");

  script_name(english:"Oracle Linux 6 : qemu-kvm (ELSA-2011-0345)");
  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:
"From Red Hat Security Advisory 2011:0345 :

Updated qemu-kvm packages that fix one security issue are now
available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having
moderate security impact. A Common Vulnerability Scoring System (CVSS)
base score, which gives a detailed severity rating, is available from
the CVE link in the References section.

KVM (Kernel-based Virtual Machine) is a full virtualization solution
for Linux on AMD64 and Intel 64 systems. qemu-kvm is the user-space
component for running virtual machines using KVM. Virtual Network
Computing (VNC) is a remote display system.

A flaw was found in the way the VNC 'password' option was handled.
Clearing a password disabled VNC authentication, allowing a remote
user able to connect to the virtual machines' VNC ports to open a VNC
session without authentication. (CVE-2011-0011)

All users of qemu-kvm should upgrade to these updated packages, which
contain a backported patch to resolve this issue. After installing
this update, shut down all running virtual machines. Once all virtual
machines have shut down, start them again for this update to take
effect."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://oss.oracle.com/pipermail/el-errata/2011-March/001994.html"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected qemu-kvm packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:A/AC:H/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:qemu-img");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:qemu-kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:qemu-kvm-tools");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:6");

  script_set_attribute(attribute:"vuln_publication_date", value:"2012/06/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2011/03/11");
  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");
  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");


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:"^6([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Oracle Linux 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 && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Oracle Linux", cpu);
if ("x86_64" >!< cpu) audit(AUDIT_ARCH_NOT, "x86_64", cpu);

flag = 0;
if (rpm_check(release:"EL6", cpu:"x86_64", reference:"qemu-img-0.12.1.2-2.113.el6_0.8")) flag++;
if (rpm_check(release:"EL6", cpu:"x86_64", reference:"qemu-kvm-0.12.1.2-2.113.el6_0.8")) flag++;
if (rpm_check(release:"EL6", cpu:"x86_64", reference:"qemu-kvm-tools-0.12.1.2-2.113.el6_0.8")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
  else security_warning(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "qemu-img / qemu-kvm / qemu-kvm-tools");
}

Redhat

advisories
bugzilla
id668589
titleCVE-2011-0011 qemu-kvm: Setting VNC password to empty string silently disables all authentication
oval
OR
  • commentRed Hat Enterprise Linux must be installed
    ovaloval:com.redhat.rhba:tst:20070304026
  • AND
    • commentRed Hat Enterprise Linux 6 is installed
      ovaloval:com.redhat.rhba:tst:20111656003
    • OR
      • AND
        • commentqemu-kvm-tools is earlier than 2:0.12.1.2-2.113.el6_0.8
          ovaloval:com.redhat.rhsa:tst:20110345001
        • commentqemu-kvm-tools is signed with Red Hat redhatrelease2 key
          ovaloval:com.redhat.rhsa:tst:20110345002
      • AND
        • commentqemu-kvm is earlier than 2:0.12.1.2-2.113.el6_0.8
          ovaloval:com.redhat.rhsa:tst:20110345003
        • commentqemu-kvm is signed with Red Hat redhatrelease2 key
          ovaloval:com.redhat.rhsa:tst:20110345004
      • AND
        • commentqemu-img is earlier than 2:0.12.1.2-2.113.el6_0.8
          ovaloval:com.redhat.rhsa:tst:20110345005
        • commentqemu-img is signed with Red Hat redhatrelease2 key
          ovaloval:com.redhat.rhsa:tst:20110345006
rhsa
idRHSA-2011:0345
released2011-03-10
severityModerate
titleRHSA-2011:0345: qemu-kvm security update (Moderate)
rpms
  • qemu-img-2:0.12.1.2-2.113.el6_0.8
  • qemu-kvm-2:0.12.1.2-2.113.el6_0.8
  • qemu-kvm-debuginfo-2:0.12.1.2-2.113.el6_0.8
  • qemu-kvm-tools-2:0.12.1.2-2.113.el6_0.8

References