7.2 High
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
8.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
7.6 High
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
34.9%
An update for kernel is now available for Red Hat Enterprise Linux 6.
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) :
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Bug Fix(es) :
KEYS: prevent creating a different user’s keyrings RHEL-6.10 (BZ#1537371)
BUG: unable to handle kernel NULL pointer dereference at (null) (BZ# 1733760)
long I/O stalls with bnx2fc from not masking off scope bits of retry delay value (BZ#1749512)
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2019:4256. The text
# itself is copyright (C) Red Hat, Inc.
#
include('compat.inc');
if (description)
{
script_id(132233);
script_version("1.3");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/04/03");
script_cve_id("CVE-2019-14821");
script_xref(name:"RHSA", value:"2019:4256");
script_name(english:"RHEL 6 : kernel (RHSA-2019:4256)");
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.
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) :
* Kernel: KVM: OOB memory access via mmio ring buffer (CVE-2019-14821)
For more details about the security issue(s), including the impact, a
CVSS score, acknowledgments, and other related information, refer to
the CVE page(s) listed in the References section.
Bug Fix(es) :
* KEYS: prevent creating a different user's keyrings RHEL-6.10
(BZ#1537371)
* BUG: unable to handle kernel NULL pointer dereference at (null) (BZ#
1733760)
* long I/O stalls with bnx2fc from not masking off scope bits of retry
delay value (BZ#1749512)");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2019:4256");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2019-14821");
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:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-14821");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_set_attribute(attribute:"vuln_publication_date", value:"2019/09/19");
script_set_attribute(attribute:"patch_publication_date", value:"2019/12/17");
script_set_attribute(attribute:"plugin_publication_date", value:"2019/12/18");
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-abi-whitelists");
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-i686");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-debuginfo-common-s390x");
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:kernel-kdump");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-kdump-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-kdump-devel");
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");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Red Hat Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2019-2024 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([^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 (get_one_kb_item("Host/ksplice/kernel-cves"))
{
rm_kb_item(name:"Host/uptrack-uname-r");
cve_list = make_list("CVE-2019-14821");
if (ksplice_cves_check(cve_list))
{
audit(AUDIT_PATCH_INSTALLED, "KSplice hotfix for RHSA-2019:4256");
}
else
{
__rpm_report = ksplice_reporting_text();
}
}
yum_updateinfo = get_kb_item("Host/RedHat/yum-updateinfo");
if (!empty_or_null(yum_updateinfo))
{
rhsa = "RHSA-2019:4256";
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", cpu:"i686", reference:"kernel-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"kernel-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"kernel-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", reference:"kernel-abi-whitelists-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"i686", reference:"kernel-debug-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"kernel-debug-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"kernel-debug-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"i686", reference:"kernel-debug-debuginfo-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"kernel-debug-debuginfo-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"kernel-debug-debuginfo-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"i686", reference:"kernel-debug-devel-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"kernel-debug-devel-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"kernel-debug-devel-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"i686", reference:"kernel-debuginfo-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"kernel-debuginfo-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"kernel-debuginfo-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"i686", reference:"kernel-debuginfo-common-i686-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"kernel-debuginfo-common-s390x-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"kernel-debuginfo-common-x86_64-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"i686", reference:"kernel-devel-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"kernel-devel-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"kernel-devel-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", reference:"kernel-doc-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", reference:"kernel-firmware-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"i686", reference:"kernel-headers-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"kernel-headers-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"kernel-headers-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"kernel-kdump-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"kernel-kdump-debuginfo-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"kernel-kdump-devel-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"i686", reference:"perf-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"perf-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"perf-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"i686", reference:"perf-debuginfo-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"perf-debuginfo-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"perf-debuginfo-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"i686", reference:"python-perf-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"python-perf-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"python-perf-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"i686", reference:"python-perf-debuginfo-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"python-perf-debuginfo-2.6.32-754.25.1.el6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"python-perf-debuginfo-2.6.32-754.25.1.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-abi-whitelists / kernel-debug / etc");
}
}
Vendor | Product | Version | CPE |
---|---|---|---|
redhat | enterprise_linux | kernel | p-cpe:/a:redhat:enterprise_linux:kernel |
redhat | enterprise_linux | kernel-abi-whitelists | p-cpe:/a:redhat:enterprise_linux:kernel-abi-whitelists |
redhat | enterprise_linux | kernel-debug | p-cpe:/a:redhat:enterprise_linux:kernel-debug |
redhat | enterprise_linux | kernel-debug-debuginfo | p-cpe:/a:redhat:enterprise_linux:kernel-debug-debuginfo |
redhat | enterprise_linux | kernel-debug-devel | p-cpe:/a:redhat:enterprise_linux:kernel-debug-devel |
redhat | enterprise_linux | kernel-debuginfo | p-cpe:/a:redhat:enterprise_linux:kernel-debuginfo |
redhat | enterprise_linux | kernel-debuginfo-common-i686 | p-cpe:/a:redhat:enterprise_linux:kernel-debuginfo-common-i686 |
redhat | enterprise_linux | kernel-debuginfo-common-s390x | p-cpe:/a:redhat:enterprise_linux:kernel-debuginfo-common-s390x |
redhat | enterprise_linux | kernel-debuginfo-common-x86_64 | p-cpe:/a:redhat:enterprise_linux:kernel-debuginfo-common-x86_64 |
redhat | enterprise_linux | kernel-devel | p-cpe:/a:redhat:enterprise_linux:kernel-devel |
7.2 High
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
8.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
7.6 High
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
34.9%