Debian DSA-3623-1 : apache2 - security update (httpoxy)

2016-07-21T00:00:00
ID DEBIAN_DSA-3623.NASL
Type nessus
Reporter This script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
Modified 2016-07-21T00:00:00

Description

Scott Geary of VendHQ discovered that the Apache HTTPD server 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.

                                        
                                            #%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Debian Security Advisory DSA-3623. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(92475);
  script_version("2.10");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/09/23");

  script_cve_id("CVE-2016-5387");
  script_xref(name:"DSA", value:"3623");

  script_name(english:"Debian DSA-3623-1 : apache2 - security update (httpoxy)");
  script_summary(english:"Checks dpkg output for the updated package");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Debian host is missing a security-related update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Scott Geary of VendHQ discovered that the Apache HTTPD server 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."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/jessie/apache2"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.debian.org/security/2016/dsa-3623"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade the apache2 packages.

For the stable distribution (jessie), this problem has been fixed in
version 2.4.10-10+deb8u5."
  );
  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:debian:debian_linux:apache2");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0");

  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) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Debian Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("debian_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (deb_check(release:"8.0", prefix:"apache2", reference:"2.4.10-10+deb8u5")) flag++;
if (deb_check(release:"8.0", prefix:"apache2-bin", reference:"2.4.10-10+deb8u5")) flag++;
if (deb_check(release:"8.0", prefix:"apache2-data", reference:"2.4.10-10+deb8u5")) flag++;
if (deb_check(release:"8.0", prefix:"apache2-dbg", reference:"2.4.10-10+deb8u5")) flag++;
if (deb_check(release:"8.0", prefix:"apache2-dev", reference:"2.4.10-10+deb8u5")) flag++;
if (deb_check(release:"8.0", prefix:"apache2-doc", reference:"2.4.10-10+deb8u5")) flag++;
if (deb_check(release:"8.0", prefix:"apache2-mpm-event", reference:"2.4.10-10+deb8u5")) flag++;
if (deb_check(release:"8.0", prefix:"apache2-mpm-itk", reference:"2.4.10-10+deb8u5")) flag++;
if (deb_check(release:"8.0", prefix:"apache2-mpm-prefork", reference:"2.4.10-10+deb8u5")) flag++;
if (deb_check(release:"8.0", prefix:"apache2-mpm-worker", reference:"2.4.10-10+deb8u5")) flag++;
if (deb_check(release:"8.0", prefix:"apache2-suexec", reference:"2.4.10-10+deb8u5")) flag++;
if (deb_check(release:"8.0", prefix:"apache2-suexec-custom", reference:"2.4.10-10+deb8u5")) flag++;
if (deb_check(release:"8.0", prefix:"apache2-suexec-pristine", reference:"2.4.10-10+deb8u5")) flag++;
if (deb_check(release:"8.0", prefix:"apache2-utils", reference:"2.4.10-10+deb8u5")) flag++;
if (deb_check(release:"8.0", prefix:"apache2.2-bin", reference:"2.4.10-10+deb8u5")) flag++;
if (deb_check(release:"8.0", prefix:"apache2.2-common", reference:"2.4.10-10+deb8u5")) flag++;
if (deb_check(release:"8.0", prefix:"libapache2-mod-macro", reference:"2.4.10-10+deb8u5")) flag++;
if (deb_check(release:"8.0", prefix:"libapache2-mod-proxy-html", reference:"2.4.10-10+deb8u5")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:deb_report_get());
  else security_warning(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");