CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/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
AI Score
Confidence
High
EPSS
Percentile
93.8%
An update for kernel is now available for Red Hat Enterprise Linux 6.2 Advanced Update Support.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es) :
Red Hat would like to thank Qualys Research Labs for reporting this issue.
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2017:2800. The text
# itself is copyright (C) Red Hat, Inc.
#
include('compat.inc');
if (description)
{
script_id(103499);
script_version("3.14");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/09/09");
script_cve_id("CVE-2017-1000253");
script_xref(name:"RHSA", value:"2017:2800");
script_xref(name:"IAVB", value:"2017-B-0135-S");
script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2024/09/30");
script_name(english:"RHEL 6 : kernel (RHSA-2017:2800)");
script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat host is missing one or more security updates.");
script_set_attribute(attribute:"description", value:
"An update for kernel is now available for Red Hat Enterprise Linux 6.2
Advanced Update Support.
Red Hat Product Security has rated this update as having a security
impact of Important. A Common Vulnerability Scoring System (CVSS) base
score, which gives a detailed severity rating, is available for each
vulnerability from the CVE link(s) in the References section.
The kernel packages contain the Linux kernel, the core of any Linux
operating system.
Security Fix(es) :
* A flaw was found in the way the Linux kernel loaded ELF executables.
Provided that an application was built as Position Independent
Executable (PIE), the loader could allow part of that application's
data segment to map over the memory area reserved for its stack,
potentially resulting in memory corruption. An unprivileged local user
with access to SUID (or otherwise privileged) PIE binary could use
this flaw to escalate their privileges on the system.
(CVE-2017-1000253, Important)
Red Hat would like to thank Qualys Research Labs for reporting this
issue.");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/vulnerabilities/3189592");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2017:2800");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2017-1000253");
script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-1000253");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"exploited_by_malware", value:"true");
script_set_attribute(attribute:"vuln_publication_date", value:"2017/10/05");
script_set_attribute(attribute:"patch_publication_date", value:"2017/09/26");
script_set_attribute(attribute:"plugin_publication_date", value:"2017/09/27");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-debug");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-debug-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-debug-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-debuginfo-common-x86_64");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-doc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-firmware");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-headers");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:perf");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:perf-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:python-perf");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:python-perf-debuginfo");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:6.2");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_set_attribute(attribute:"stig_severity", value:"I");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Red Hat Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2017-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl", "linux_alt_patch_detect.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");
include("ksplice.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\.2([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 6.2", "Red Hat " + os_ver);
if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "s390" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Red Hat", cpu);
if (get_one_kb_item("Host/ksplice/kernel-cves"))
{
rm_kb_item(name:"Host/uptrack-uname-r");
cve_list = make_list("CVE-2017-1000253");
if (ksplice_cves_check(cve_list))
{
audit(AUDIT_PATCH_INSTALLED, "KSplice hotfix for RHSA-2017:2800");
}
else
{
__rpm_report = ksplice_reporting_text();
}
}
yum_updateinfo = get_kb_item("Host/RedHat/yum-updateinfo");
if (!empty_or_null(yum_updateinfo))
{
rhsa = "RHSA-2017:2800";
yum_report = redhat_generate_yum_updateinfo_report(rhsa:rhsa);
if (!empty_or_null(yum_report))
{
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
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", sp:"2", cpu:"x86_64", reference:"kernel-2.6.32-220.76.1.el6")) flag++;
if (rpm_check(release:"RHEL6", sp:"2", cpu:"x86_64", reference:"kernel-debug-2.6.32-220.76.1.el6")) flag++;
if (rpm_check(release:"RHEL6", sp:"2", cpu:"x86_64", reference:"kernel-debug-debuginfo-2.6.32-220.76.1.el6")) flag++;
if (rpm_check(release:"RHEL6", sp:"2", cpu:"x86_64", reference:"kernel-debug-devel-2.6.32-220.76.1.el6")) flag++;
if (rpm_check(release:"RHEL6", sp:"2", cpu:"x86_64", reference:"kernel-debuginfo-2.6.32-220.76.1.el6")) flag++;
if (rpm_check(release:"RHEL6", sp:"2", cpu:"x86_64", reference:"kernel-debuginfo-common-x86_64-2.6.32-220.76.1.el6")) flag++;
if (rpm_check(release:"RHEL6", sp:"2", cpu:"x86_64", reference:"kernel-devel-2.6.32-220.76.1.el6")) flag++;
if (rpm_check(release:"RHEL6", sp:"2", reference:"kernel-doc-2.6.32-220.76.1.el6")) flag++;
if (rpm_check(release:"RHEL6", sp:"2", reference:"kernel-firmware-2.6.32-220.76.1.el6")) flag++;
if (rpm_check(release:"RHEL6", sp:"2", cpu:"x86_64", reference:"kernel-headers-2.6.32-220.76.1.el6")) flag++;
if (rpm_check(release:"RHEL6", sp:"2", cpu:"x86_64", reference:"perf-2.6.32-220.76.1.el6")) flag++;
if (rpm_check(release:"RHEL6", sp:"2", cpu:"x86_64", reference:"perf-debuginfo-2.6.32-220.76.1.el6")) flag++;
if (rpm_check(release:"RHEL6", sp:"2", cpu:"x86_64", reference:"python-perf-2.6.32-220.76.1.el6")) flag++;
if (rpm_check(release:"RHEL6", sp:"2", cpu:"x86_64", reference:"python-perf-debuginfo-2.6.32-220.76.1.el6")) flag++;
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
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, "kernel / kernel-debug / kernel-debug-debuginfo / kernel-debug-devel / etc");
}
}
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/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
AI Score
Confidence
High
EPSS
Percentile
93.8%