CVSS2
Attack Vector
LOCAL
Attack Complexity
HIGH
Authentication
SINGLE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:H/Au:S/C:C/I:C/A:C
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
5.1%
Updated system-config-firewall 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.
system-config-firewall is a graphical user interface for basic firewall setup.
It was found that system-config-firewall used the Python pickle module in an insecure way when sending data (via D-Bus) to the privileged back-end mechanism. A local user authorized to configure firewall rules using system-config-firewall could use this flaw to execute arbitrary code with root privileges, by sending a specially crafted serialized object. (CVE-2011-2520)
Red Hat would like to thank Marco Slaviero of SensePost for reporting this issue.
This erratum updates system-config-firewall to use JSON (JavaScript Object Notation) for data exchange, instead of pickle. Therefore, an updated version of system-config-printer that uses this new communication data format is also provided in this erratum.
Users of system-config-firewall are advised to upgrade to these updated packages, which contain a backported patch to resolve this issue. Running instances of system-config-firewall must be restarted before the utility will be able to communicate with its updated back-end.
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2011:0953. The text
# itself is copyright (C) Red Hat, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(55616);
script_version("1.19");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/14");
script_cve_id("CVE-2011-2520");
script_bugtraq_id(48715);
script_xref(name:"RHSA", value:"2011:0953");
script_name(english:"RHEL 6 : system-config-firewall (RHSA-2011:0953)");
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 system-config-firewall 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.
system-config-firewall is a graphical user interface for basic
firewall setup.
It was found that system-config-firewall used the Python pickle module
in an insecure way when sending data (via D-Bus) to the privileged
back-end mechanism. A local user authorized to configure firewall
rules using system-config-firewall could use this flaw to execute
arbitrary code with root privileges, by sending a specially crafted
serialized object. (CVE-2011-2520)
Red Hat would like to thank Marco Slaviero of SensePost for reporting
this issue.
This erratum updates system-config-firewall to use JSON (JavaScript
Object Notation) for data exchange, instead of pickle. Therefore, an
updated version of system-config-printer that uses this new
communication data format is also provided in this erratum.
Users of system-config-firewall are advised to upgrade to these
updated packages, which contain a backported patch to resolve this
issue. Running instances of system-config-firewall must be restarted
before the utility will be able to communicate with its updated
back-end."
);
script_set_attribute(
attribute:"see_also",
value:"https://access.redhat.com/security/cve/cve-2011-2520"
);
script_set_attribute(
attribute:"see_also",
value:"https://access.redhat.com/errata/RHSA-2011:0953"
);
script_set_attribute(attribute:"solution", value:"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:L/AC:H/Au:S/C:C/I:C/A:C");
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:system-config-firewall");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:system-config-firewall-base");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:system-config-firewall-tui");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:system-config-printer");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:system-config-printer-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:system-config-printer-libs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:system-config-printer-udev");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:6");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:6.1");
script_set_attribute(attribute:"vuln_publication_date", value:"2011/07/21");
script_set_attribute(attribute:"patch_publication_date", value:"2011/07/18");
script_set_attribute(attribute:"plugin_publication_date", value:"2011/07/19");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2011-2021 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);
yum_updateinfo = get_kb_item("Host/RedHat/yum-updateinfo");
if (!empty_or_null(yum_updateinfo))
{
rhsa = "RHSA-2011:0953";
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", reference:"system-config-firewall-1.2.27-3.el6_1.3")) flag++;
if (rpm_check(release:"RHEL6", reference:"system-config-firewall-base-1.2.27-3.el6_1.3")) flag++;
if (rpm_check(release:"RHEL6", reference:"system-config-firewall-tui-1.2.27-3.el6_1.3")) flag++;
if (rpm_check(release:"RHEL6", cpu:"i686", reference:"system-config-printer-1.1.16-17.el6_1.2")) flag++;
if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"system-config-printer-1.1.16-17.el6_1.2")) flag++;
if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"system-config-printer-1.1.16-17.el6_1.2")) flag++;
if (rpm_check(release:"RHEL6", cpu:"i686", reference:"system-config-printer-debuginfo-1.1.16-17.el6_1.2")) flag++;
if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"system-config-printer-debuginfo-1.1.16-17.el6_1.2")) flag++;
if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"system-config-printer-debuginfo-1.1.16-17.el6_1.2")) flag++;
if (rpm_check(release:"RHEL6", cpu:"i686", reference:"system-config-printer-libs-1.1.16-17.el6_1.2")) flag++;
if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"system-config-printer-libs-1.1.16-17.el6_1.2")) flag++;
if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"system-config-printer-libs-1.1.16-17.el6_1.2")) flag++;
if (rpm_check(release:"RHEL6", cpu:"i686", reference:"system-config-printer-udev-1.1.16-17.el6_1.2")) flag++;
if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"system-config-printer-udev-1.1.16-17.el6_1.2")) flag++;
if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"system-config-printer-udev-1.1.16-17.el6_1.2")) 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, "system-config-firewall / system-config-firewall-base / etc");
}
}
CVSS2
Attack Vector
LOCAL
Attack Complexity
HIGH
Authentication
SINGLE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:H/Au:S/C:C/I:C/A:C
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
5.1%