5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
0.963 High
EPSS
Percentile
99.5%
A flaw within the processing of ranged HTTP requests has been discovered in the range filter module of nginx. A remote attacker could possibly exploit this flaw to disclose parts of the cache file header, or, if used in combination with third party modules, disclose potentially sensitive memory by sending specially crafted HTTP requests. (CVE-2017-7529)
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux AMI Security Advisory ALAS-2017-894.
#
include("compat.inc");
if (description)
{
script_id(103228);
script_version("3.3");
script_cvs_date("Date: 2018/04/18 15:09:36");
script_cve_id("CVE-2017-7529");
script_xref(name:"ALAS", value:"2017-894");
script_name(english:"Amazon Linux AMI : nginx (ALAS-2017-894)");
script_summary(english:"Checks rpm output for the updated packages");
script_set_attribute(
attribute:"synopsis",
value:"The remote Amazon Linux AMI host is missing a security update."
);
script_set_attribute(
attribute:"description",
value:
"A flaw within the processing of ranged HTTP requests has been
discovered in the range filter module of nginx. A remote attacker
could possibly exploit this flaw to disclose parts of the cache file
header, or, if used in combination with third party modules, disclose
potentially sensitive memory by sending specially crafted HTTP
requests. (CVE-2017-7529)"
);
script_set_attribute(
attribute:"see_also",
value:"https://alas.aws.amazon.com/ALAS-2017-894.html"
);
script_set_attribute(
attribute:"solution",
value:"Run 'yum update nginx' to update your system."
);
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:nginx");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:nginx-all-modules");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:nginx-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:nginx-mod-http-geoip");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:nginx-mod-http-image-filter");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:nginx-mod-http-perl");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:nginx-mod-http-xslt-filter");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:nginx-mod-mail");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:nginx-mod-stream");
script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux");
script_set_attribute(attribute:"patch_publication_date", value:"2017/09/13");
script_set_attribute(attribute:"plugin_publication_date", value:"2017/09/15");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2017-2018 Tenable Network Security, Inc.");
script_family(english:"Amazon Linux Local Security Checks");
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:"nginx-1.12.1-1.32.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"nginx-all-modules-1.12.1-1.32.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"nginx-debuginfo-1.12.1-1.32.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"nginx-mod-http-geoip-1.12.1-1.32.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"nginx-mod-http-image-filter-1.12.1-1.32.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"nginx-mod-http-perl-1.12.1-1.32.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"nginx-mod-http-xslt-filter-1.12.1-1.32.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"nginx-mod-mail-1.12.1-1.32.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"nginx-mod-stream-1.12.1-1.32.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, "nginx / nginx-all-modules / nginx-debuginfo / nginx-mod-http-geoip / etc");
}
Vendor | Product | Version | CPE |
---|---|---|---|
amazon | linux | nginx | p-cpe:/a:amazon:linux:nginx |
amazon | linux | nginx-all-modules | p-cpe:/a:amazon:linux:nginx-all-modules |
amazon | linux | nginx-debuginfo | p-cpe:/a:amazon:linux:nginx-debuginfo |
amazon | linux | nginx-mod-http-geoip | p-cpe:/a:amazon:linux:nginx-mod-http-geoip |
amazon | linux | nginx-mod-http-image-filter | p-cpe:/a:amazon:linux:nginx-mod-http-image-filter |
amazon | linux | nginx-mod-http-perl | p-cpe:/a:amazon:linux:nginx-mod-http-perl |
amazon | linux | nginx-mod-http-xslt-filter | p-cpe:/a:amazon:linux:nginx-mod-http-xslt-filter |
amazon | linux | nginx-mod-mail | p-cpe:/a:amazon:linux:nginx-mod-mail |
amazon | linux | nginx-mod-stream | p-cpe:/a:amazon:linux:nginx-mod-stream |
amazon | linux | cpe:/o:amazon:linux |
5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
0.963 High
EPSS
Percentile
99.5%