Vulnerabilities > CVE-2006-1896 - Code Injection vulnerability in PHPbb Group PHPbb

047910
CVSS 6.0 - MEDIUM
Attack vector
NETWORK
Attack complexity
MEDIUM
Privileges required
SINGLE
Confidentiality impact
PARTIAL
Integrity impact
PARTIAL
Availability impact
PARTIAL
network
phpbb-group
CWE-94
nessus

Summary

Unspecified vulnerability in phpBB allows remote authenticated users with Administration Panel access to execute arbitrary PHP code via crafted Font Colour 3 ($theme[fontcolor3] variable) and/or signature values, possibly involving the highlight functionality. NOTE: the original report does not clarify whether this issue is static code injection, eval injection, or another type of vulnerability.

Vulnerable Configurations

Part Description Count
Application
Phpbb_Group
1

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Leverage Executable Code in Non-Executable Files
    An attack of this type exploits a system's trust in configuration and resource files, when the executable loads the resource (such as an image file or configuration file) the attacker has modified the file to either execute malicious code directly or manipulate the target process (e.g. application server) to execute based on the malicious configuration parameters. Since systems are increasingly interrelated mashing up resources from local and remote sources the possibility of this attack occurring is high. The attack can be directed at a client system, such as causing buffer overrun through loading seemingly benign image files, as in Microsoft Security Bulletin MS04-028 where specially crafted JPEG files could cause a buffer overrun once loaded into the browser. Another example targets clients reading pdf files. In this case the attacker simply appends javascript to the end of a legitimate url for a pdf (http://www.gnucitizen.org/blog/danger-danger-danger/) http://path/to/pdf/file.pdf#whatever_name_you_want=javascript:your_code_here The client assumes that they are reading a pdf, but the attacker has modified the resource and loaded executable javascript into the client's browser process. The attack can also target server processes. The attacker edits the resource or configuration file, for example a web.xml file used to configure security permissions for a J2EE app server, adding role name "public" grants all users with the public role the ability to use the administration functionality. The server trusts its configuration file to be correct, but when they are manipulated, the attacker gains full control.
  • Manipulating User-Controlled Variables
    This attack targets user controlled variables (DEBUG=1, PHP Globals, and So Forth). An attacker can override environment variables leveraging user-supplied, untrusted query variables directly used on the application server without any data sanitization. In extreme cases, the attacker can change variables controlling the business logic of the application. For instance, in languages like PHP, a number of poorly set default configurations may allow the user to override variables.

Nessus

NASL familyDebian Local Security Checks
NASL idDEBIAN_DSA-1066.NASL
descriptionIt was discovered that phpbb2, a web-based bulletin board, does insufficiently sanitise values passed to the
last seen2020-06-01
modified2020-06-02
plugin id22608
published2006-10-14
reporterThis script is Copyright (C) 2006-2019 Tenable Network Security, Inc.
sourcehttps://www.tenable.com/plugins/nessus/22608
titleDebian DSA-1066-1 : phpbb2 - missing input sanitising
code
#%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-1066. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(22608);
  script_version("1.15");
  script_cvs_date("Date: 2019/08/02 13:32:19");

  script_cve_id("CVE-2006-1896", "CVE-2006-4450");
  script_xref(name:"DSA", value:"1066");

  script_name(english:"Debian DSA-1066-1 : phpbb2 - missing input sanitising");
  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:
"It was discovered that phpbb2, a web-based bulletin board, does
insufficiently sanitise values passed to the 'Font Colour 3' setting,
which might lead to the execution of injected code by admin users."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=365533"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.debian.org/security/2006/dsa-1066"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade the phpbb2 package.

The old stable distribution (woody) does not contain phpbb2 packages.

For the stable distribution (sarge) this problem has been fixed in
version 2.0.13+1-6sarge3."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:S/C:P/I:P/A:P");
  script_cwe_id(94);

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:phpbb2");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:3.1");

  script_set_attribute(attribute:"patch_publication_date", value:"2006/05/20");
  script_set_attribute(attribute:"plugin_publication_date", value:"2006/10/14");
  script_set_attribute(attribute:"vuln_publication_date", value:"2006/05/12");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2006-2019 Tenable Network Security, Inc.");
  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:"3.1", prefix:"phpbb2", reference:"2.0.13-6sarge3")) flag++;
if (deb_check(release:"3.1", prefix:"phpbb2-conf-mysql", reference:"2.0.13-6sarge3")) flag++;
if (deb_check(release:"3.1", prefix:"phpbb2-languages", reference:"2.0.13-6sarge3")) 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");