CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
83.1%
An issue was discovered in kwajd_read_headers in mspack/kwajd.c in libmspack before 0.7alpha. Bad KWAJ file header extensions could cause a one or two byte overwrite.(CVE-2018-14681)
An issue was discovered in mspack/chmd.c in libmspack before 0.7alpha.
There is an off-by-one error in the TOLOWER() macro for CHM decompression.(CVE-2018-14682)
An issue was discovered in mspack/chmd.c in libmspack before 0.7alpha.
It does not reject blank CHM filenames.(CVE-2018-14680)
A vulnerability in ClamAV versions prior to 0.100.2 could allow an attacker to cause a denial of service (DoS) condition. The vulnerability is due to an error related to the MEW unpacker within the ‘unmew11()’ function (libclamav/mew.c), which can be exploited to trigger an invalid read memory access via a specially crafted EXE file.(CVE-2018-15378)
An issue was discovered in mspack/chmd.c in libmspack before 0.7alpha.
There is an off-by-one error in the CHM PMGI/PMGL chunk number validity checks, which could lead to denial of service (uninitialized data dereference and application crash).(CVE-2018-14679)
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux AMI Security Advisory ALAS-2019-1146.
#
include('compat.inc');
if (description)
{
script_id(121131);
script_version("1.3");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/06/27");
script_cve_id(
"CVE-2018-14679",
"CVE-2018-14680",
"CVE-2018-14681",
"CVE-2018-14682",
"CVE-2018-15378"
);
script_xref(name:"ALAS", value:"2019-1146");
script_name(english:"Amazon Linux AMI : clamav (ALAS-2019-1146)");
script_set_attribute(attribute:"synopsis", value:
"The remote Amazon Linux AMI host is missing a security update.");
script_set_attribute(attribute:"description", value:
"An issue was discovered in kwajd_read_headers in mspack/kwajd.c in
libmspack before 0.7alpha. Bad KWAJ file header extensions could cause
a one or two byte overwrite.(CVE-2018-14681)
An issue was discovered in mspack/chmd.c in libmspack before 0.7alpha.
There is an off-by-one error in the TOLOWER() macro for CHM
decompression.(CVE-2018-14682)
An issue was discovered in mspack/chmd.c in libmspack before 0.7alpha.
It does not reject blank CHM filenames.(CVE-2018-14680)
A vulnerability in ClamAV versions prior to 0.100.2 could allow an
attacker to cause a denial of service (DoS) condition. The
vulnerability is due to an error related to the MEW unpacker within
the 'unmew11()' function (libclamav/mew.c), which can be exploited to
trigger an invalid read memory access via a specially crafted EXE
file.(CVE-2018-15378)
An issue was discovered in mspack/chmd.c in libmspack before 0.7alpha.
There is an off-by-one error in the CHM PMGI/PMGL chunk number
validity checks, which could lead to denial of service (uninitialized
data dereference and application crash).(CVE-2018-14679)");
script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/ALAS-2019-1146.html");
script_set_attribute(attribute:"solution", value:
"Run 'yum update clamav' to update your system.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/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-2018-14682");
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:"2018/07/28");
script_set_attribute(attribute:"patch_publication_date", value:"2019/01/12");
script_set_attribute(attribute:"plugin_publication_date", value:"2019/01/14");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:clamav");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:clamav-data");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:clamav-db");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:clamav-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:clamav-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:clamav-filesystem");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:clamav-lib");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:clamav-milter");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:clamav-update");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:clamd");
script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Amazon Linux 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");
script_require_keys("Host/local_checks_enabled", "Host/AmazonLinux/release", "Host/AmazonLinux/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/AmazonLinux/release");
if (isnull(release) || !strlen(release)) audit(AUDIT_OS_NOT, "Amazon Linux");
os_ver = pregmatch(pattern: "^AL(A|\d)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Amazon Linux");
os_ver = os_ver[1];
if (os_ver != "A")
{
if (os_ver == 'A') os_ver = 'AMI';
audit(AUDIT_OS_NOT, "Amazon Linux AMI", "Amazon Linux " + os_ver);
}
if (!get_kb_item("Host/AmazonLinux/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
flag = 0;
if (rpm_check(release:"ALA", reference:"clamav-0.100.2-2.35.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"clamav-data-0.100.2-2.35.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"clamav-db-0.100.2-2.35.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"clamav-debuginfo-0.100.2-2.35.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"clamav-devel-0.100.2-2.35.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"clamav-filesystem-0.100.2-2.35.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"clamav-lib-0.100.2-2.35.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"clamav-milter-0.100.2-2.35.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"clamav-update-0.100.2-2.35.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"clamd-0.100.2-2.35.amzn1")) 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, "clamav / clamav-data / clamav-db / clamav-debuginfo / clamav-devel / etc");
}
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-14679
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-14680
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-14681
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-14682
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-15378
alas.aws.amazon.com/ALAS-2019-1146.html
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
83.1%