Vulnerabilities > CVE-2016-4590 - Improper Input Validation vulnerability in Apple Safari
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
LOW Integrity impact
LOW Availability impact
NONE Summary
WebKit in Apple iOS before 9.3.3 and Safari before 9.1.2 mishandles about: URLs, which allows remote attackers to bypass the Same Origin Policy via a crafted web site.
Vulnerable Configurations
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 Fedora Local Security Checks NASL id FEDORA_2016-D957FFBAC1.NASL description This update addresses the following vulnerabilities : - [CVE-2016-4622](https://cve.mitre.org/cgi-bin/cvename.cg i?name=CVE-2016-4622), [CVE-2016-4624](https://cve.mitre.org/cgi-bin/cvename.cg i?name=CVE-2016-4624), [CVE-2016-4591](https://cve.mitre.org/cgi-bin/cvename.cg i?name=CVE-2016-4591), [CVE-2016-4590](https://cve.mitre.org/cgi-bin/cvename.cg i?name=CVE-2016-4590) Additional fixes : - Fix performance in accelerated compositing mode with the modesetting intel driver and DRI3 enabled. - Reduce the amount of file descriptors that the Web Process keeps open. - Fix Web Process deadlocks when loading HLS videos. - Make CSS and SVG animations run at 60fps. - Make meter elements accessible. - Improve accessibility name and description of elements to make it more compatible with W3C specs and fix several bugs in which the accessible name of objects was missing or broken. - Fix a crash when running windowed plugins under Wayland. - Fix a crash at process exit under Wayland. - Fix several crashes and rendering issues. Translation updates : - German. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-05 modified 2016-09-02 plugin id 93264 published 2016-09-02 reporter This script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/93264 title Fedora 23 : webkitgtk4 (2016-d957ffbac1) code #%NASL_MIN_LEVEL 80502 # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Fedora Security Advisory FEDORA-2016-d957ffbac1. # include("compat.inc"); if (description) { script_id(93264); script_version("2.4"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04"); script_cve_id("CVE-2016-4590", "CVE-2016-4591", "CVE-2016-4622", "CVE-2016-4624"); script_xref(name:"FEDORA", value:"2016-d957ffbac1"); script_name(english:"Fedora 23 : webkitgtk4 (2016-d957ffbac1)"); script_summary(english:"Checks rpm output for the updated package."); script_set_attribute( attribute:"synopsis", value:"The remote Fedora host is missing a security update." ); script_set_attribute( attribute:"description", value: "This update addresses the following vulnerabilities : - [CVE-2016-4622](https://cve.mitre.org/cgi-bin/cvename.cg i?name=CVE-2016-4622), [CVE-2016-4624](https://cve.mitre.org/cgi-bin/cvename.cg i?name=CVE-2016-4624), [CVE-2016-4591](https://cve.mitre.org/cgi-bin/cvename.cg i?name=CVE-2016-4591), [CVE-2016-4590](https://cve.mitre.org/cgi-bin/cvename.cg i?name=CVE-2016-4590) Additional fixes : - Fix performance in accelerated compositing mode with the modesetting intel driver and DRI3 enabled. - Reduce the amount of file descriptors that the Web Process keeps open. - Fix Web Process deadlocks when loading HLS videos. - Make CSS and SVG animations run at 60fps. - Make meter elements accessible. - Improve accessibility name and description of elements to make it more compatible with W3C specs and fix several bugs in which the accessible name of objects was missing or broken. - Fix a crash when running windowed plugins under Wayland. - Fix a crash at process exit under Wayland. - Fix several crashes and rendering issues. Translation updates : - German. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. 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://bodhi.fedoraproject.org/updates/FEDORA-2016-d957ffbac1" ); script_set_attribute( attribute:"solution", value:"Update the affected webkitgtk4 package." ); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:N/A:N"); script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:webkitgtk4"); script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:23"); script_set_attribute(attribute:"vuln_publication_date", value:"2016/07/22"); script_set_attribute(attribute:"patch_publication_date", value:"2016/09/01"); script_set_attribute(attribute:"plugin_publication_date", value:"2016/09/02"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"Fedora Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list"); 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/RedHat/release"); if (isnull(release) || "Fedora" >!< release) audit(AUDIT_OS_NOT, "Fedora"); os_ver = pregmatch(pattern: "Fedora.*release ([0-9]+)", string:release); if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora"); os_ver = os_ver[1]; if (! preg(pattern:"^23([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 23", "Fedora " + os_ver); if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); cpu = get_kb_item("Host/cpu"); if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH); if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Fedora", cpu); flag = 0; if (rpm_check(release:"FC23", reference:"webkitgtk4-2.12.4-1.fc23")) flag++; if (flag) { security_report_v4( port : 0, severity : SECURITY_HOLE, extra : rpm_report_get() ); exit(0); } else { tested = pkg_tests_get(); if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested); else audit(AUDIT_PACKAGE_NOT_INSTALLED, "webkitgtk4"); }
NASL family Fedora Local Security Checks NASL id FEDORA_2016-4728DFE3EC.NASL description This update addresses the following vulnerabilities : - [CVE-2016-4622](https://cve.mitre.org/cgi-bin/cvename.cg i?name=CVE-2016-4622), [CVE-2016-4624](https://cve.mitre.org/cgi-bin/cvename.cg i?name=CVE-2016-4624), [CVE-2016-4591](https://cve.mitre.org/cgi-bin/cvename.cg i?name=CVE-2016-4591), [CVE-2016-4590](https://cve.mitre.org/cgi-bin/cvename.cg i?name=CVE-2016-4590) Additional fixes : - Fix performance in accelerated compositing mode with the modesetting intel driver and DRI3 enabled. - Reduce the amount of file descriptors that the Web Process keeps open. - Fix Web Process deadlocks when loading HLS videos. - Make CSS and SVG animations run at 60fps. - Make meter elements accessible. - Improve accessibility name and description of elements to make it more compatible with W3C specs and fix several bugs in which the accessible name of objects was missing or broken. - Fix a crash when running windowed plugins under Wayland. - Fix a crash at process exit under Wayland. - Fix several crashes and rendering issues. Translation updates : - German. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-05 modified 2016-08-29 plugin id 93139 published 2016-08-29 reporter This script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/93139 title Fedora 24 : webkitgtk4 (2016-4728dfe3ec) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-3079-1.NASL description A large number of security issues were discovered in the WebKitGTK+ Web and JavaScript engines. If a user were tricked into viewing a malicious website, a remote attacker could exploit a variety of issues related to web browser security, including cross-site scripting attacks, denial of service attacks, and arbitrary code execution. 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. last seen 2020-06-01 modified 2020-06-02 plugin id 93511 published 2016-09-15 reporter Ubuntu Security Notice (C) 2016-2019 Canonical, Inc. / NASL script (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/93511 title Ubuntu 16.04 LTS : webkit2gtk vulnerabilities (USN-3079-1) NASL family MacOS X Local Security Checks NASL id MACOSX_SAFARI9_1_2.NASL description The version of Apple Safari installed on the remote Mac OS X host is prior to 9.1.2. It is, therefore, affected by multiple vulnerabilities, the most serious of which can result in remote code execution, in the following components : - WebKit - WebKit JavaScript Bindings - WebKit Page Loading last seen 2020-06-01 modified 2020-06-02 plugin id 92358 published 2016-07-19 reporter This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/92358 title Mac OS X : Apple Safari < 9.1.2 Multiple Vulnerabilities
References
- http://lists.apple.com/archives/security-announce/2016/Jul/msg00001.html
- http://lists.apple.com/archives/security-announce/2016/Jul/msg00001.html
- http://lists.apple.com/archives/security-announce/2016/Jul/msg00004.html
- http://lists.apple.com/archives/security-announce/2016/Jul/msg00004.html
- http://packetstormsecurity.com/files/138502/WebKitGTK-SOP-Bypass-Information-Disclosure.html
- http://packetstormsecurity.com/files/138502/WebKitGTK-SOP-Bypass-Information-Disclosure.html
- http://www.securityfocus.com/archive/1/539295/100/0/threaded
- http://www.securityfocus.com/archive/1/539295/100/0/threaded
- http://www.securityfocus.com/bid/91835
- http://www.securityfocus.com/bid/91835
- http://www.securitytracker.com/id/1036343
- http://www.securitytracker.com/id/1036343
- https://support.apple.com/HT206900
- https://support.apple.com/HT206900
- https://support.apple.com/HT206902
- https://support.apple.com/HT206902