Vulnerabilities > CVE-2014-3462 - Information Exposure vulnerability in multiple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
HIGH Integrity impact
NONE Availability impact
NONE Summary
The ".encfs6.xml" configuration file in encfs before 1.7.5 allows remote attackers to access sensitive data by setting "blockMACBytes" to 0 and adding 8 to "blockMACRandBytes".
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| OS | 3 | |
| Application | 8 |
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Subverting Environment Variable Values The attacker directly or indirectly modifies environment variables used by or controlling the target software. The attacker's goal is to cause the target software to deviate from its expected operation in a manner that benefits the attacker.
- Footprinting An attacker engages in probing and exploration activity to identify constituents and properties of the target. Footprinting is a general term to describe a variety of information gathering techniques, often used by attackers in preparation for some attack. It consists of using tools to learn as much as possible about the composition, configuration, and security mechanisms of the targeted application, system or network. Information that might be collected during a footprinting effort could include open ports, applications and their versions, network topology, and similar information. While footprinting is not intended to be damaging (although certain activities, such as network scans, can sometimes cause disruptions to vulnerable applications inadvertently) it may often pave the way for more damaging attacks.
- Exploiting Trust in Client (aka Make the Client Invisible) An attack of this type exploits a programs' vulnerabilities in client/server communication channel authentication and data integrity. It leverages the implicit trust a server places in the client, or more importantly, that which the server believes is the client. An attacker executes this type of attack by placing themselves in the communication channel between client and server such that communication directly to the server is possible where the server believes it is communicating only with a valid client. There are numerous variations of this type of attack.
- Browser Fingerprinting An attacker carefully crafts small snippets of Java Script to efficiently detect the type of browser the potential victim is using. Many web-based attacks need prior knowledge of the web browser including the version of browser to ensure successful exploitation of a vulnerability. Having this knowledge allows an attacker to target the victim with attacks that specifically exploit known or zero day weaknesses in the type and version of the browser used by the victim. Automating this process via Java Script as a part of the same delivery system used to exploit the browser is considered more efficient as the attacker can supply a browser fingerprinting method and integrate it with exploit code, all contained in Java Script and in response to the same web page request by the browser.
- Session Credential Falsification through Prediction This attack targets predictable session ID in order to gain privileges. The attacker can predict the session ID used during a transaction to perform spoofing and session hijacking.
Nessus
NASL family SuSE Local Security Checks NASL id OPENSUSE-2017-82.NASL description This update for encfs fixes the following issues : - A new option --require-macs was added to address CVE-2014-3462 (boo#878257) This will now trigger a warning if MAC headers were disabled via configuration. In addition, encfs was updated to 1.8.1 including all upstream improvements and fixes. last seen 2020-06-05 modified 2017-01-17 plugin id 96548 published 2017-01-17 reporter This script is Copyright (C) 2017-2020 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/96548 title openSUSE Security Update : encfs (openSUSE-2017-82) code #%NASL_MIN_LEVEL 80502 # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from openSUSE Security Update openSUSE-2017-82. # # The text description of this plugin is (C) SUSE LLC. # include("compat.inc"); if (description) { script_id(96548); script_version("3.5"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04"); script_cve_id("CVE-2014-3462"); script_name(english:"openSUSE Security Update : encfs (openSUSE-2017-82)"); script_summary(english:"Check for the openSUSE-2017-82 patch"); script_set_attribute( attribute:"synopsis", value:"The remote openSUSE host is missing a security update." ); script_set_attribute( attribute:"description", value: "This update for encfs fixes the following issues : - A new option --require-macs was added to address CVE-2014-3462 (boo#878257) This will now trigger a warning if MAC headers were disabled via configuration. In addition, encfs was updated to 1.8.1 including all upstream improvements and fixes." ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.opensuse.org/show_bug.cgi?id=878257" ); script_set_attribute( attribute:"solution", value:"Update the affected encfs packages." ); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N"); script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:encfs"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:encfs-debuginfo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:encfs-debugsource"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:encfs-lang"); script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:13.2"); script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:42.1"); script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:42.2"); script_set_attribute(attribute:"patch_publication_date", value:"2017/01/16"); script_set_attribute(attribute:"plugin_publication_date", value:"2017/01/17"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2017-2020 Tenable Network Security, Inc."); script_family(english:"SuSE Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/SuSE/release", "Host/SuSE/rpm-list", "Host/cpu"); 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/SuSE/release"); if (isnull(release) || release =~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "openSUSE"); if (release !~ "^(SUSE13\.2|SUSE42\.1|SUSE42\.2)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "13.2 / 42.1 / 42.2", release); if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); ourarch = get_kb_item("Host/cpu"); if (!ourarch) audit(AUDIT_UNKNOWN_ARCH); if (ourarch !~ "^(i586|i686|x86_64)$") audit(AUDIT_ARCH_NOT, "i586 / i686 / x86_64", ourarch); flag = 0; if ( rpm_check(release:"SUSE13.2", reference:"encfs-1.8.1-25.3.1") ) flag++; if ( rpm_check(release:"SUSE13.2", reference:"encfs-debuginfo-1.8.1-25.3.1") ) flag++; if ( rpm_check(release:"SUSE13.2", reference:"encfs-debugsource-1.8.1-25.3.1") ) flag++; if ( rpm_check(release:"SUSE13.2", reference:"encfs-lang-1.8.1-25.3.1") ) flag++; if ( rpm_check(release:"SUSE42.1", reference:"encfs-1.8.1-4.1") ) flag++; if ( rpm_check(release:"SUSE42.1", reference:"encfs-debuginfo-1.8.1-4.1") ) flag++; if ( rpm_check(release:"SUSE42.1", reference:"encfs-debugsource-1.8.1-4.1") ) flag++; if ( rpm_check(release:"SUSE42.1", reference:"encfs-lang-1.8.1-4.1") ) flag++; if ( rpm_check(release:"SUSE42.2", reference:"encfs-lang-1.8.1-5.1") ) flag++; if ( rpm_check(release:"SUSE42.2", cpu:"x86_64", reference:"encfs-1.8.1-5.1") ) flag++; if ( rpm_check(release:"SUSE42.2", cpu:"x86_64", reference:"encfs-debuginfo-1.8.1-5.1") ) flag++; if ( rpm_check(release:"SUSE42.2", cpu:"x86_64", reference:"encfs-debugsource-1.8.1-5.1") ) 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, "encfs / encfs-debuginfo / encfs-debugsource / encfs-lang"); }NASL family Gentoo Local Security Checks NASL id GENTOO_GLSA-201512-09.NASL description The remote host is affected by the vulnerability described in GLSA-201512-09 (encfs: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in encfs. Please review the CVE identifiers referenced below for details. Impact : A local attacker can utilize a possible buffer overflow in the encodeName method of StreamNameIO and BlockNameIO to execute arbitrary code or cause a Denial of Service. Also multiple weak cryptographics practices have been found in encfs. Workaround : There is no known workaround at this time. last seen 2020-06-01 modified 2020-06-02 plugin id 87709 published 2016-01-04 reporter This script is Copyright (C) 2016-2018 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/87709 title GLSA-201512-09 : encfs: Multiple vulnerabilities code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Gentoo Linux Security Advisory GLSA 201512-09. # # The advisory text is Copyright (C) 2001-2018 Gentoo Foundation, Inc. # and licensed under the Creative Commons - Attribution / Share Alike # license. See http://creativecommons.org/licenses/by-sa/3.0/ # include("compat.inc"); if (description) { script_id(87709); script_version("$Revision: 2.3 $"); script_cvs_date("$Date: 2018/01/26 17:15:57 $"); script_cve_id("CVE-2014-3462"); script_xref(name:"GLSA", value:"201512-09"); script_name(english:"GLSA-201512-09 : encfs: Multiple vulnerabilities"); script_summary(english:"Checks for updated package(s) in /var/db/pkg"); script_set_attribute( attribute:"synopsis", value: "The remote Gentoo host is missing one or more security-related patches." ); script_set_attribute( attribute:"description", value: "The remote host is affected by the vulnerability described in GLSA-201512-09 (encfs: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in encfs. Please review the CVE identifiers referenced below for details. Impact : A local attacker can utilize a possible buffer overflow in the encodeName method of StreamNameIO and BlockNameIO to execute arbitrary code or cause a Denial of Service. Also multiple weak cryptographics practices have been found in encfs. Workaround : There is no known workaround at this time." ); script_set_attribute( attribute:"see_also", value:"https://security.gentoo.org/glsa/201512-09" ); script_set_attribute( attribute:"solution", value: "All encfs users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose '>=sys-fs/encfs-1.7.5'" ); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N"); script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:encfs"); script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux"); script_set_attribute(attribute:"patch_publication_date", value:"2015/12/30"); script_set_attribute(attribute:"plugin_publication_date", value:"2016/01/04"); 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:"Gentoo Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/Gentoo/release", "Host/Gentoo/qpkg-list"); exit(0); } include("audit.inc"); include("global_settings.inc"); include("qpkg.inc"); if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED); if (!get_kb_item("Host/Gentoo/release")) audit(AUDIT_OS_NOT, "Gentoo"); if (!get_kb_item("Host/Gentoo/qpkg-list")) audit(AUDIT_PACKAGE_LIST_MISSING); flag = 0; if (qpkg_check(package:"sys-fs/encfs", unaffected:make_list("ge 1.7.5"), vulnerable:make_list("lt 1.7.5"))) flag++; if (flag) { if (report_verbosity > 0) security_warning(port:0, extra:qpkg_report_get()); else security_warning(0); exit(0); } else { tested = qpkg_tests_get(); if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested); else audit(AUDIT_PACKAGE_NOT_INSTALLED, "encfs"); }