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%
An update for httpd is now available for Red Hat Enterprise Linux 5 and 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 httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server.
Security Fix(es) :
Note: After this update, httpd will no longer pass the value of the Proxy request header to scripts via the HTTP_PROXY environment variable.
Red Hat would like to thank Scott Geary (VendHQ) 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-2016:1421. The text
# itself is copyright (C) Red Hat, Inc.
#
include("compat.inc");
if (description)
{
script_id(92398);
script_version("2.16");
script_cvs_date("Date: 2019/10/24 15:35:41");
script_cve_id("CVE-2016-5387");
script_xref(name:"RHSA", value:"2016:1421");
script_name(english:"RHEL 5 / 6 : httpd (RHSA-2016:1421) (httpoxy)");
script_summary(english:"Checks the rpm output for the updated packages");
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 httpd is now available for Red Hat Enterprise Linux 5
and 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 httpd packages provide the Apache HTTP Server, a powerful,
efficient, and extensible web server.
Security Fix(es) :
* 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. (CVE-2016-5387)
Note: After this update, httpd will no longer pass the value of the
Proxy request header to scripts via the HTTP_PROXY environment
variable.
Red Hat would like to thank Scott Geary (VendHQ) for reporting this
issue."
);
script_set_attribute(
attribute:"see_also",
value:"https://access.redhat.com/security/vulnerabilities/httpoxy"
);
script_set_attribute(
attribute:"see_also",
value:"https://access.redhat.com/solutions/2435501"
);
script_set_attribute(
attribute:"see_also",
value:"https://access.redhat.com/errata/RHSA-2016:1421"
);
script_set_attribute(
attribute:"see_also",
value:"https://access.redhat.com/security/cve/cve-2016-5387"
);
script_set_attribute(attribute:"solution", value:"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:H/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:H/PR:N/UI:N/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:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:httpd");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:httpd-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:httpd-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:httpd-manual");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:httpd-tools");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:mod_ssl");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:5");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:6");
script_set_attribute(attribute:"vuln_publication_date", value:"2016/07/19");
script_set_attribute(attribute:"patch_publication_date", value:"2016/07/18");
script_set_attribute(attribute:"plugin_publication_date", value:"2016/07/19");
script_set_attribute(attribute:"in_the_news", value:"true");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_family(english:"Red Hat Local Security Checks");
script_dependencies("ssh_get_info.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");
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:"^(5|6)([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 5.x / 6.x", "Red Hat " + os_ver);
if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "s390" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Red Hat", cpu);
yum_updateinfo = get_kb_item("Host/RedHat/yum-updateinfo");
if (!empty_or_null(yum_updateinfo))
{
rhsa = "RHSA-2016:1421";
yum_report = redhat_generate_yum_updateinfo_report(rhsa:rhsa);
if (!empty_or_null(yum_report))
{
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
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:"RHEL5", cpu:"i386", reference:"httpd-2.2.3-92.el5_11")) flag++;
if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"httpd-2.2.3-92.el5_11")) flag++;
if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"httpd-2.2.3-92.el5_11")) flag++;
if (rpm_check(release:"RHEL5", reference:"httpd-debuginfo-2.2.3-92.el5_11")) flag++;
if (rpm_check(release:"RHEL5", reference:"httpd-devel-2.2.3-92.el5_11")) flag++;
if (rpm_check(release:"RHEL5", cpu:"i386", reference:"httpd-manual-2.2.3-92.el5_11")) flag++;
if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"httpd-manual-2.2.3-92.el5_11")) flag++;
if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"httpd-manual-2.2.3-92.el5_11")) flag++;
if (rpm_check(release:"RHEL5", cpu:"i386", reference:"mod_ssl-2.2.3-92.el5_11")) flag++;
if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"mod_ssl-2.2.3-92.el5_11")) flag++;
if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"mod_ssl-2.2.3-92.el5_11")) flag++;
if (rpm_check(release:"RHEL6", cpu:"i686", reference:"httpd-2.2.15-54.el6_8")) flag++;
if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"httpd-2.2.15-54.el6_8")) flag++;
if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"httpd-2.2.15-54.el6_8")) flag++;
if (rpm_check(release:"RHEL6", reference:"httpd-debuginfo-2.2.15-54.el6_8")) flag++;
if (rpm_check(release:"RHEL6", reference:"httpd-devel-2.2.15-54.el6_8")) flag++;
if (rpm_check(release:"RHEL6", reference:"httpd-manual-2.2.15-54.el6_8")) flag++;
if (rpm_check(release:"RHEL6", cpu:"i686", reference:"httpd-tools-2.2.15-54.el6_8")) flag++;
if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"httpd-tools-2.2.15-54.el6_8")) flag++;
if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"httpd-tools-2.2.15-54.el6_8")) flag++;
if (rpm_check(release:"RHEL6", cpu:"i686", reference:"mod_ssl-2.2.15-54.el6_8")) flag++;
if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"mod_ssl-2.2.15-54.el6_8")) flag++;
if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"mod_ssl-2.2.15-54.el6_8")) flag++;
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
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, "httpd / httpd-debuginfo / httpd-devel / httpd-manual / httpd-tools / etc");
}
}
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%