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
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
96.4%
It was discovered that httpd used the value of the Proxy header from HTTP requests to initialize the HTTP_PROXY environment variable for CGI scripts, which in turn was incorrectly used by certain HTTP client implementations to configure the proxy for outgoing HTTP requests. A remote attacker could possibly use this flaw to redirect HTTP requests performed by a CGI script to an attacker-controlled proxy via a malicious HTTP request (known as the ‘httpoxy’ class of vulnerabilities).
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux AMI Security Advisory ALAS-2016-725.
#
include("compat.inc");
if (description)
{
script_id(92472);
script_version("2.6");
script_cvs_date("Date: 2018/04/18 15:09:36");
script_cve_id("CVE-2016-5387");
script_xref(name:"ALAS", value:"2016-725");
script_name(english:"Amazon Linux AMI : httpd24 / httpd (ALAS-2016-725) (httpoxy)");
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:
"It was discovered that httpd used the value of the Proxy header from
HTTP requests to initialize the HTTP_PROXY environment variable for
CGI scripts, which in turn was incorrectly used by certain HTTP client
implementations to configure the proxy for outgoing HTTP requests. A
remote attacker could possibly use this flaw to redirect HTTP requests
performed by a CGI script to an attacker-controlled proxy via a
malicious HTTP request (known as the 'httpoxy' class of
vulnerabilities)."
);
script_set_attribute(
attribute:"see_also",
value:"https://httpoxy.org/"
);
script_set_attribute(
attribute:"see_also",
value:"https://alas.aws.amazon.com/ALAS-2016-725.html"
);
script_set_attribute(
attribute:"solution",
value:
"Run 'yum update httpd24' to update your system.
Run 'yum update httpd' to update your system."
);
script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:N/C:P/I:P/A:P");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:httpd");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:httpd-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:httpd-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:httpd-manual");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:httpd-tools");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:httpd24");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:httpd24-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:httpd24-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:httpd24-manual");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:httpd24-tools");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:mod24_ldap");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:mod24_proxy_html");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:mod24_session");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:mod24_ssl");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:mod_ssl");
script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux");
script_set_attribute(attribute:"patch_publication_date", value:"2016/07/20");
script_set_attribute(attribute:"in_the_news", value:"true");
script_set_attribute(attribute:"plugin_publication_date", value:"2016/07/21");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2016-2018 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:"httpd-2.2.31-1.8.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"httpd-debuginfo-2.2.31-1.8.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"httpd-devel-2.2.31-1.8.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"httpd-manual-2.2.31-1.8.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"httpd-tools-2.2.31-1.8.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"httpd24-2.4.23-1.65.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"httpd24-debuginfo-2.4.23-1.65.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"httpd24-devel-2.4.23-1.65.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"httpd24-manual-2.4.23-1.65.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"httpd24-tools-2.4.23-1.65.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"mod24_ldap-2.4.23-1.65.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"mod24_proxy_html-2.4.23-1.65.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"mod24_session-2.4.23-1.65.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"mod24_ssl-2.4.23-1.65.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"mod_ssl-2.2.31-1.8.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, "httpd / httpd-debuginfo / httpd-devel / httpd-manual / httpd-tools / etc");
}
Vendor | Product | Version | CPE |
---|---|---|---|
amazon | linux | httpd | p-cpe:/a:amazon:linux:httpd |
amazon | linux | httpd-debuginfo | p-cpe:/a:amazon:linux:httpd-debuginfo |
amazon | linux | httpd-devel | p-cpe:/a:amazon:linux:httpd-devel |
amazon | linux | httpd-manual | p-cpe:/a:amazon:linux:httpd-manual |
amazon | linux | httpd-tools | p-cpe:/a:amazon:linux:httpd-tools |
amazon | linux | httpd24 | p-cpe:/a:amazon:linux:httpd24 |
amazon | linux | httpd24-debuginfo | p-cpe:/a:amazon:linux:httpd24-debuginfo |
amazon | linux | httpd24-devel | p-cpe:/a:amazon:linux:httpd24-devel |
amazon | linux | httpd24-manual | p-cpe:/a:amazon:linux:httpd24-manual |
amazon | linux | httpd24-tools | p-cpe:/a:amazon:linux:httpd24-tools |
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
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
96.4%