Vulnerabilities > CVE-2011-4405 - Improper Input Validation vulnerability in Canonical Ubuntu Linux 11.04/11.10
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
PARTIAL Integrity impact
PARTIAL Availability impact
PARTIAL Summary
The cupshelpers scripts in system-config-printer in Ubuntu 11.04 and 11.10, as used by the automatic printer driver download service, uses an "insecure connection" for queries to the OpenPrinting database, which allows remote attackers to execute arbitrary code via a man-in-the-middle (MITM) attack that modifies packages or repositories.
Vulnerable Configurations
Part | Description | Count |
---|---|---|
OS | 2 |
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Buffer Overflow via Environment Variables This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
- Server Side Include (SSI) Injection An attacker can use Server Side Include (SSI) Injection to send code to a web application that then gets executed by the web server. Doing so enables the attacker to achieve similar results to Cross Site Scripting, viz., arbitrary code execution and information disclosure, albeit on a more limited scale, since the SSI directives are nowhere near as powerful as a full-fledged scripting language. Nonetheless, the attacker can conveniently gain access to sensitive files, such as password files, and execute shell commands.
- Cross Zone Scripting An attacker is able to cause a victim to load content into their web-browser that bypasses security zone controls and gain access to increased privileges to execute scripting code or other web objects such as unsigned ActiveX controls or applets. This is a privilege elevation attack targeted at zone-based web-browser security. In a zone-based model, pages belong to one of a set of zones corresponding to the level of privilege assigned to that page. Pages in an untrusted zone would have a lesser level of access to the system and/or be restricted in the types of executable content it was allowed to invoke. In a cross-zone scripting attack, a page that should be assigned to a less privileged zone is granted the privileges of a more trusted zone. This can be accomplished by exploiting bugs in the browser, exploiting incorrect configuration in the zone controls, through a cross-site scripting attack that causes the attackers' content to be treated as coming from a more trusted page, or by leveraging some piece of system functionality that is accessible from both the trusted and less trusted zone. This attack differs from "Restful Privilege Escalation" in that the latter correlates to the inadequate securing of RESTful access methods (such as HTTP DELETE) on the server, while cross-zone scripting attacks the concept of security zones as implemented by a browser.
- Cross Site Scripting through Log Files An attacker may leverage a system weakness where logs are susceptible to log injection to insert scripts into the system's logs. If these logs are later viewed by an administrator through a thin administrative interface and the log data is not properly HTML encoded before being written to the page, the attackers' scripts stored in the log will be executed in the administrative interface with potentially serious consequences. This attack pattern is really a combination of two other attack patterns: log injection and stored cross site scripting.
- Command Line Execution through SQL Injection An attacker uses standard SQL injection methods to inject data into the command line for execution. This could be done directly through misuse of directives such as MSSQL_xp_cmdshell or indirectly through injection of data into the database that would be interpreted as shell commands. Sometime later, an unscrupulous backend application (or could be part of the functionality of the same application) fetches the injected data stored in the database and uses this data as command line arguments without performing proper validation. The malicious data escapes that data plane by spawning new commands to be executed on the host.
Nessus
NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-1265-1.NASL description Marc Deslauriers discovered that system-config-printer last seen 2020-06-01 modified 2020-06-02 plugin id 56868 published 2011-11-18 reporter Ubuntu Security Notice (C) 2011-2019 Canonical, Inc. / NASL script (C) 2011-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/56868 title Ubuntu 11.04 / 11.10 : system-config-printer vulnerability (USN-1265-1) code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Ubuntu Security Notice USN-1265-1. The text # itself is copyright (C) Canonical, Inc. See # <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered # trademark of Canonical, Inc. # include("compat.inc"); if (description) { script_id(56868); script_version("1.8"); script_cvs_date("Date: 2019/09/19 12:54:27"); script_cve_id("CVE-2011-4405"); script_xref(name:"USN", value:"1265-1"); script_name(english:"Ubuntu 11.04 / 11.10 : system-config-printer vulnerability (USN-1265-1)"); script_summary(english:"Checks dpkg output for updated package."); script_set_attribute( attribute:"synopsis", value:"The remote Ubuntu host is missing a security-related patch." ); script_set_attribute( attribute:"description", value: "Marc Deslauriers discovered that system-config-printer's cupshelpers scripts used by the Ubuntu automatic printer driver download service queried the OpenPrinting database using an insecure connection. If a remote attacker were able to perform a man-in-the-middle attack, this flaw could be exploited to install altered packages and repositories. Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues." ); script_set_attribute( attribute:"see_also", value:"https://usn.ubuntu.com/1265-1/" ); script_set_attribute( attribute:"solution", value:"Update the affected python-cupshelpers package." ); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python-cupshelpers"); script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:11.04"); script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:11.10"); script_set_attribute(attribute:"vuln_publication_date", value:"2011/11/29"); script_set_attribute(attribute:"patch_publication_date", value:"2011/11/17"); script_set_attribute(attribute:"plugin_publication_date", value:"2011/11/18"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"Ubuntu Security Notice (C) 2011-2019 Canonical, Inc. / NASL script (C) 2011-2019 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"Ubuntu Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l"); exit(0); } include("audit.inc"); include("ubuntu.inc"); include("misc_func.inc"); if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED); release = get_kb_item("Host/Ubuntu/release"); if ( isnull(release) ) audit(AUDIT_OS_NOT, "Ubuntu"); release = chomp(release); if (! preg(pattern:"^(11\.04|11\.10)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 11.04 / 11.10", "Ubuntu " + release); if ( ! get_kb_item("Host/Debian/dpkg-l") ) audit(AUDIT_PACKAGE_LIST_MISSING); cpu = get_kb_item("Host/cpu"); if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH); if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Ubuntu", cpu); flag = 0; if (ubuntu_check(osver:"11.04", pkgname:"python-cupshelpers", pkgver:"1.3.1+20110222-0ubuntu16.5")) flag++; if (ubuntu_check(osver:"11.10", pkgname:"python-cupshelpers", pkgver:"1.3.6+20110831-0ubuntu9.4")) flag++; if (flag) { security_report_v4( port : 0, severity : SECURITY_HOLE, extra : ubuntu_report_get() ); exit(0); } else { tested = ubuntu_pkg_tests_get(); if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested); else audit(AUDIT_PACKAGE_NOT_INSTALLED, "python-cupshelpers"); }
NASL family SuSE Local Security Checks NASL id SUSE_11_SYSTEM-CONFIG-PRINTER-120104.NASL description The following issues have been fixed : - system-config-printer used an unauthenticated connection when downloading printer drivers from openprinting.org (CVE-2011-4405). This update disables the printer driver download feature. - system-config-printer did not properly quote shell meta characters in SMB server or workgroup names when passing them to the shell. (CVE-2011-2899) last seen 2020-06-05 modified 2012-01-16 plugin id 57555 published 2012-01-16 reporter This script is Copyright (C) 2012-2020 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/57555 title SuSE 11.1 Security Update : system-config-printer (SAT Patch Number 5607) NASL family SuSE Local Security Checks NASL id SUSE_11_4_PYTHON-CUPSHELPERS-120103.NASL description This update fixes a typo from the previous update : system-config-printer used an unauthenticated connection when downloading printer drivers from openprinting.org (CVE-2011-4405). This update disables the printer driver download feature. system-config-printer did not properly quote shell meta characters in SMB server or workgroup names when passing them to the shell (CVE-2011-2899). last seen 2020-06-05 modified 2014-06-13 plugin id 76002 published 2014-06-13 reporter This script is Copyright (C) 2014-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/76002 title openSUSE Security Update : python-cupshelpers (openSUSE-SU-2011:1331-2) NASL family SuSE Local Security Checks NASL id SUSE_11_3_PYTHON-CUPSHELPERS-120103.NASL description This update fixes a typo from the previous update : system-config-printer used an unauthenticated connection when downloading printer drivers from openprinting.org (CVE-2011-4405). This update disables the printer driver download feature. system-config-printer did not properly quote shell meta characters in SMB server or workgroup names when passing them to the shell (CVE-2011-2899). last seen 2020-06-05 modified 2014-06-13 plugin id 75718 published 2014-06-13 reporter This script is Copyright (C) 2014-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/75718 title openSUSE Security Update : python-cupshelpers (openSUSE-SU-2011:1331-2) NASL family SuSE Local Security Checks NASL id OPENSUSE-2011-89.NASL description - Add system-config-printer-subprocess-no-shell.patch: avoid escaping issues when running commands. Fix bnc#735322. - Add system-config-printer-no-openprinting.patch: this disables the feature where PPD drivers can be downloaded from OpenPrinting.org. See discussion in bnc#733542. As a side-effect, this fixes CVE-2011-4405. last seen 2020-06-01 modified 2020-06-02 plugin id 74537 published 2014-06-13 reporter This script is Copyright (C) 2014-2019 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/74537 title openSUSE Security Update : system-config-printer (openSUSE-2011-89) NASL family SuSE Local Security Checks NASL id SUSE_11_3_PYTHON-CUPSHELPERS-111208.NASL description system-config-printer used an unauthenticated connection when downloading printer drivers from openprinting.org (CVE-2011-4405). This update disables the printer driver download feature. system-config-printer did not properly quote shell meta characters in SMB server or workgroup names when passing them to the shell (CVE-2011-2899). last seen 2020-06-01 modified 2020-06-02 plugin id 75717 published 2014-06-13 reporter This script is Copyright (C) 2014-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/75717 title openSUSE Security Update : python-cupshelpers (openSUSE-SU-2011:1331-1) NASL family SuSE Local Security Checks NASL id SUSE_11_4_PYTHON-CUPSHELPERS-111208.NASL description system-config-printer used an unauthenticated connection when downloading printer drivers from openprinting.org (CVE-2011-4405). This update disables the printer driver download feature. system-config-printer did not properly quote shell meta characters in SMB server or workgroup names when passing them to the shell (CVE-2011-2899). last seen 2020-06-01 modified 2020-06-02 plugin id 76001 published 2014-06-13 reporter This script is Copyright (C) 2014-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/76001 title openSUSE Security Update : python-cupshelpers (openSUSE-SU-2011:1331-1)