Vulnerabilities > CVE-2018-4267 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in Apple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
HIGH Integrity impact
HIGH Availability impact
HIGH Summary
Multiple memory corruption issues were addressed with improved memory handling. This issue affected versions prior to iOS 11.4.1, tvOS 11.4.1, Safari 11.1.2, iTunes 12.8 for Windows, iCloud for Windows 7.6.
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.
- Overflow Buffers Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
- Client-side Injection-induced Buffer Overflow This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
- Filter Failure through Buffer Overflow In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
- MIME Conversion An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.
Nessus
NASL family SuSE Local Security Checks NASL id OPENSUSE-2018-1025.NASL description This update for webkit2gtk3 to version 2.20.5 fixes the following issues : Security issue fixed : - CVE-2018-12911: Fix off-by-one in xdg_mime_get_simple_globs (bsc#1101999). - CVE-2018-4261, CVE-2018-4262, CVE-2018-4263, CVE-2018-4264, CVE-2018-4265, CVE-2018-4267, CVE-2018-4272, CVE-2018-4284: Processing maliciously crafted web content may lead to arbitrary code execution. A memory corruption issue was addressed with improved memory handling. - CVE-2018-4266: A malicious website may be able to cause a denial of service. A race condition was addressed with additional validation. - CVE-2018-4270, CVE-2018-4271, CVE-2018-4273: Processing maliciously crafted web content may lead to an unexpected application crash. A memory corruption issue was addressed with improved input validation. - CVE-2018-4278: A malicious website may exfiltrate audio data cross-origin. Sound fetched through audio elements may be exfiltrated cross-origin. This issue was addressed with improved audio taint tracking. Other bugs fixed : - Fix rendering artifacts in some websites due to a bug introduced in 2.20.4. - Fix a crash when leaving accelerated compositing mode. - Fix non-deterministic build failure due to missing JavaScriptCore/JSContextRef.h. This update was imported from the SUSE:SLE-15:Update update project. last seen 2020-06-05 modified 2018-09-24 plugin id 117656 published 2018-09-24 reporter This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/117656 title openSUSE Security Update : webkit2gtk3 (openSUSE-2018-1025) 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-2018-1025. # # The text description of this plugin is (C) SUSE LLC. # include("compat.inc"); if (description) { script_id(117656); script_version("1.2"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04"); script_cve_id("CVE-2018-12911", "CVE-2018-4261", "CVE-2018-4262", "CVE-2018-4263", "CVE-2018-4264", "CVE-2018-4265", "CVE-2018-4266", "CVE-2018-4267", "CVE-2018-4270", "CVE-2018-4271", "CVE-2018-4272", "CVE-2018-4273", "CVE-2018-4278", "CVE-2018-4284"); script_name(english:"openSUSE Security Update : webkit2gtk3 (openSUSE-2018-1025)"); script_summary(english:"Check for the openSUSE-2018-1025 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 webkit2gtk3 to version 2.20.5 fixes the following issues : Security issue fixed : - CVE-2018-12911: Fix off-by-one in xdg_mime_get_simple_globs (bsc#1101999). - CVE-2018-4261, CVE-2018-4262, CVE-2018-4263, CVE-2018-4264, CVE-2018-4265, CVE-2018-4267, CVE-2018-4272, CVE-2018-4284: Processing maliciously crafted web content may lead to arbitrary code execution. A memory corruption issue was addressed with improved memory handling. - CVE-2018-4266: A malicious website may be able to cause a denial of service. A race condition was addressed with additional validation. - CVE-2018-4270, CVE-2018-4271, CVE-2018-4273: Processing maliciously crafted web content may lead to an unexpected application crash. A memory corruption issue was addressed with improved input validation. - CVE-2018-4278: A malicious website may exfiltrate audio data cross-origin. Sound fetched through audio elements may be exfiltrated cross-origin. This issue was addressed with improved audio taint tracking. Other bugs fixed : - Fix rendering artifacts in some websites due to a bug introduced in 2.20.4. - Fix a crash when leaving accelerated compositing mode. - Fix non-deterministic build failure due to missing JavaScriptCore/JSContextRef.h. 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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 !~ "^(SUSE15\.0)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "15.0", release); if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); ourarch = get_kb_item("Host/cpu"); if (!ourarch) audit(AUDIT_UNKNOWN_ARCH); if (ourarch !~ "^(i586|i686|x86_64)$") audit(AUDIT_ARCH_NOT, "i586 / i686 / x86_64", ourarch); flag = 0; if ( rpm_check(release:"SUSE15.0", reference:"libjavascriptcoregtk-4_0-18-2.20.5-lp150.2.6.1") ) flag++; if ( rpm_check(release:"SUSE15.0", reference:"libjavascriptcoregtk-4_0-18-debuginfo-2.20.5-lp150.2.6.1") ) flag++; if ( rpm_check(release:"SUSE15.0", reference:"libwebkit2gtk-4_0-37-2.20.5-lp150.2.6.1") ) flag++; 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if ( rpm_check(release:"SUSE15.0", reference:"webkit2gtk3-devel-2.20.5-lp150.2.6.1") ) flag++; if ( rpm_check(release:"SUSE15.0", reference:"webkit2gtk3-plugin-process-gtk2-2.20.5-lp150.2.6.1") ) flag++; if ( rpm_check(release:"SUSE15.0", reference:"webkit2gtk3-plugin-process-gtk2-debuginfo-2.20.5-lp150.2.6.1") ) flag++; if ( rpm_check(release:"SUSE15.0", cpu:"x86_64", reference:"libjavascriptcoregtk-4_0-18-32bit-2.20.5-lp150.2.6.1") ) flag++; if ( rpm_check(release:"SUSE15.0", cpu:"x86_64", reference:"libjavascriptcoregtk-4_0-18-32bit-debuginfo-2.20.5-lp150.2.6.1") ) flag++; if ( rpm_check(release:"SUSE15.0", cpu:"x86_64", reference:"libwebkit2gtk-4_0-37-32bit-2.20.5-lp150.2.6.1") ) flag++; if ( rpm_check(release:"SUSE15.0", cpu:"x86_64", reference:"libwebkit2gtk-4_0-37-32bit-debuginfo-2.20.5-lp150.2.6.1") ) flag++; if (flag) { if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get()); else security_hole(0); exit(0); } else { tested = pkg_tests_get(); if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested); else audit(AUDIT_PACKAGE_NOT_INSTALLED, "libjavascriptcoregtk-4_0-18 / libjavascriptcoregtk-4_0-18-debuginfo / etc"); }NASL family SuSE Local Security Checks NASL id OPENSUSE-2019-68.NASL description This update for webkit2gtk3 to version 2.22.4 fixes the following issues : Security issues fixed : CVE-2018-4191, CVE-2018-4197, CVE-2018-4299, CVE-2018-4306, CVE-2018-4309, CVE-2018-4392, CVE-2018-4312, CVE-2018-4314, CVE-2018-4315, CVE-2018-4316, CVE-2018-4317, CVE-2018-4318, CVE-2018-4319, CVE-2018-4323, CVE-2018-4328, CVE-2018-4358, CVE-2018-4359, CVE-2018-4361, CVE-2018-4345, CVE-2018-4372, CVE-2018-4373, CVE-2018-4375, CVE-2018-4376, CVE-2018-4416, CVE-2018-4378, CVE-2018-4382, CVE-2018-4386 (bsc#1110279, bsc#1116998). This update was imported from the SUSE:SLE-12-SP2:Update update project. last seen 2020-06-01 modified 2020-06-02 plugin id 121291 published 2019-01-22 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/121291 title openSUSE Security Update : webkit2gtk3 (openSUSE-2019-68) code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from openSUSE Security Update openSUSE-2019-68. # # The text description of this plugin is (C) SUSE LLC. # include("compat.inc"); if (description) { script_id(121291); script_version("1.2"); script_cvs_date("Date: 2019/04/30 14:30:16"); script_cve_id("CVE-2018-4191", "CVE-2018-4197", "CVE-2018-4207", "CVE-2018-4208", "CVE-2018-4209", "CVE-2018-4210", "CVE-2018-4212", "CVE-2018-4213", "CVE-2018-4261", "CVE-2018-4262", "CVE-2018-4263", "CVE-2018-4264", "CVE-2018-4265", "CVE-2018-4266", "CVE-2018-4267", "CVE-2018-4270", "CVE-2018-4272", "CVE-2018-4273", "CVE-2018-4278", "CVE-2018-4284", "CVE-2018-4299", "CVE-2018-4306", "CVE-2018-4309", "CVE-2018-4312", "CVE-2018-4314", "CVE-2018-4315", "CVE-2018-4316", "CVE-2018-4317", "CVE-2018-4318", "CVE-2018-4319", "CVE-2018-4323", "CVE-2018-4328", "CVE-2018-4345", "CVE-2018-4358", "CVE-2018-4359", "CVE-2018-4361", "CVE-2018-4372", "CVE-2018-4373", "CVE-2018-4375", "CVE-2018-4376", "CVE-2018-4378", "CVE-2018-4382", "CVE-2018-4386", "CVE-2018-4392", "CVE-2018-4416"); script_name(english:"openSUSE Security Update : webkit2gtk3 (openSUSE-2019-68)"); script_summary(english:"Check for the openSUSE-2019-68 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 webkit2gtk3 to version 2.22.4 fixes the following issues : Security issues fixed : CVE-2018-4191, CVE-2018-4197, CVE-2018-4299, CVE-2018-4306, CVE-2018-4309, CVE-2018-4392, CVE-2018-4312, CVE-2018-4314, CVE-2018-4315, CVE-2018-4316, CVE-2018-4317, CVE-2018-4318, CVE-2018-4319, CVE-2018-4323, CVE-2018-4328, CVE-2018-4358, CVE-2018-4359, CVE-2018-4361, CVE-2018-4345, CVE-2018-4372, CVE-2018-4373, CVE-2018-4375, CVE-2018-4376, CVE-2018-4416, CVE-2018-4378, CVE-2018-4382, CVE-2018-4386 (bsc#1110279, bsc#1116998). 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if ( rpm_check(release:"SUSE42.3", reference:"webkit-jsc-4-2.22.4-15.1") ) flag++; if ( rpm_check(release:"SUSE42.3", reference:"webkit-jsc-4-debuginfo-2.22.4-15.1") ) flag++; if ( rpm_check(release:"SUSE42.3", reference:"webkit2gtk-4_0-injected-bundles-2.22.4-15.1") ) flag++; if ( rpm_check(release:"SUSE42.3", reference:"webkit2gtk-4_0-injected-bundles-debuginfo-2.22.4-15.1") ) flag++; if ( rpm_check(release:"SUSE42.3", reference:"webkit2gtk3-debugsource-2.22.4-15.1") ) flag++; if ( rpm_check(release:"SUSE42.3", reference:"webkit2gtk3-devel-2.22.4-15.1") ) flag++; if ( rpm_check(release:"SUSE42.3", reference:"webkit2gtk3-minibrowser-2.22.4-15.1") ) flag++; if ( rpm_check(release:"SUSE42.3", reference:"webkit2gtk3-minibrowser-debuginfo-2.22.4-15.1") ) flag++; if ( rpm_check(release:"SUSE42.3", reference:"webkit2gtk3-plugin-process-gtk2-2.22.4-15.1") ) flag++; if ( rpm_check(release:"SUSE42.3", reference:"webkit2gtk3-plugin-process-gtk2-debuginfo-2.22.4-15.1") ) flag++; if ( rpm_check(release:"SUSE42.3", cpu:"x86_64", reference:"libjavascriptcoregtk-4_0-18-32bit-2.22.4-15.1") ) flag++; if ( rpm_check(release:"SUSE42.3", cpu:"x86_64", reference:"libjavascriptcoregtk-4_0-18-debuginfo-32bit-2.22.4-15.1") ) flag++; if ( rpm_check(release:"SUSE42.3", cpu:"x86_64", reference:"libwebkit2gtk-4_0-37-32bit-2.22.4-15.1") ) flag++; if ( rpm_check(release:"SUSE42.3", cpu:"x86_64", reference:"libwebkit2gtk-4_0-37-debuginfo-32bit-2.22.4-15.1") ) 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, "libjavascriptcoregtk-4_0-18 / libjavascriptcoregtk-4_0-18-32bit / etc"); }NASL family Gentoo Local Security Checks NASL id GENTOO_GLSA-201808-04.NASL description The remote host is affected by the vulnerability described in GLSA-201808-04 (WebkitGTK+: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in WebKitGTK+. Please review the referenced CVE identifiers for details. Impact : A remote attacker could execute arbitrary commands or cause a denial of service condition via a maliciously crafted web content. Workaround : There is no known workaround at this time. last seen 2020-06-01 modified 2020-06-02 plugin id 112078 published 2018-08-23 reporter This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/112078 title GLSA-201808-04 : WebkitGTK+: Multiple vulnerabilities NASL family Windows NASL id ITUNES_12_8.NASL description The version of Apple iTunes installed on the remote Windows host is prior to 12.8. It is, therefore, affected by multiple vulnerabilities as referenced in the HT208933 advisory. Note that Nessus has not tested for this issue but has instead relied only on the application last seen 2020-06-01 modified 2020-06-02 plugin id 111105 published 2018-07-16 reporter This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/111105 title Apple iTunes < 12.8 Multiple Vulnerabilities (credentialed check) NASL family SuSE Local Security Checks NASL id SUSE_SU-2018-2752-1.NASL description This update for webkit2gtk3 to version 2.20.5 fixes the following issues : Security issue fixed : CVE-2018-12911: Fix off-by-one in xdg_mime_get_simple_globs (bsc#1101999). CVE-2018-4261, CVE-2018-4262, CVE-2018-4263, CVE-2018-4264, CVE-2018-4265, CVE-2018-4267, CVE-2018-4272, CVE-2018-4284: Processing maliciously crafted web content may lead to arbitrary code execution. A memory corruption issue was addressed with improved memory handling. CVE-2018-4266: A malicious website may be able to cause a denial of service. A race condition was addressed with additional validation. CVE-2018-4270, CVE-2018-4271, CVE-2018-4273: Processing maliciously crafted web content may lead to an unexpected application crash. A memory corruption issue was addressed with improved input validation. CVE-2018-4278: A malicious website may exfiltrate audio data cross-origin. Sound fetched through audio elements may be exfiltrated cross-origin. This issue was addressed with improved audio taint tracking. Other bugs fixed: Fix rendering artifacts in some websites due to a bug introduced in 2.20.4. Fix a crash when leaving accelerated compositing mode. Fix non-deterministic build failure due to missing JavaScriptCore/JSContextRef.h. Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-03-19 modified 2019-01-02 plugin id 120100 published 2019-01-02 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/120100 title SUSE SLED15 / SLES15 Security Update : webkit2gtk3 (SUSE-SU-2018:2752-1) NASL family Misc. NASL id APPLETV_11_4_1.NASL description According to its banner, the version of Apple TV on the remote device is prior to 11.4.1. It is, therefore, affected by multiple vulnerabilities as described in the HT208936 security advisory. Note that only 4th and 5th generation models are affected by these vulnerabilities. last seen 2020-06-01 modified 2020-06-02 plugin id 111110 published 2018-07-16 reporter This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/111110 title Apple TV < 11.4.1 Multiple Vulnerabilities NASL family SuSE Local Security Checks NASL id OPENSUSE-2019-705.NASL description This update for webkit2gtk3 to version 2.20.5 fixes the following issues : Security issue fixed : - CVE-2018-12911: Fix off-by-one in xdg_mime_get_simple_globs (bsc#1101999). - CVE-2018-4261, CVE-2018-4262, CVE-2018-4263, CVE-2018-4264, CVE-2018-4265, CVE-2018-4267, CVE-2018-4272, CVE-2018-4284: Processing maliciously crafted web content may lead to arbitrary code execution. A memory corruption issue was addressed with improved memory handling. - CVE-2018-4266: A malicious website may be able to cause a denial of service. A race condition was addressed with additional validation. - CVE-2018-4270, CVE-2018-4271, CVE-2018-4273: Processing maliciously crafted web content may lead to an unexpected application crash. A memory corruption issue was addressed with improved input validation. - CVE-2018-4278: A malicious website may exfiltrate audio data cross-origin. Sound fetched through audio elements may be exfiltrated cross-origin. This issue was addressed with improved audio taint tracking. Other bugs fixed : - Fix rendering artifacts in some websites due to a bug introduced in 2.20.4. - Fix a crash when leaving accelerated compositing mode. - Fix non-deterministic build failure due to missing JavaScriptCore/JSContextRef.h. This update was imported from the SUSE:SLE-15:Update update project. last seen 2020-06-01 modified 2020-06-02 plugin id 123306 published 2019-03-27 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/123306 title openSUSE Security Update : webkit2gtk3 (openSUSE-2019-705) NASL family Peer-To-Peer File Sharing NASL id ITUNES_12_8_BANNER.NASL description The version of Apple iTunes installed on the remote Windows host is prior to 12.8. It is, therefore, affected by multiple vulnerabilities in WebKit as referenced in the HT208933 advisory. Note that Nessus has not tested for this issue but has instead relied only on the application last seen 2020-06-01 modified 2020-06-02 plugin id 117878 published 2018-10-02 reporter This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/117878 title Apple iTunes < 12.8 Multiple Vulnerabilities (uncredentialed check) NASL family SuSE Local Security Checks NASL id SUSE_SU-2019-0059-1.NASL description This update for webkit2gtk3 to version 2.22.4 fixes the following issues : Security issues fixed : CVE-2018-4191, CVE-2018-4197, CVE-2018-4299, CVE-2018-4306, CVE-2018-4309, CVE-2018-4392, CVE-2018-4312, CVE-2018-4314, CVE-2018-4315, CVE-2018-4316, CVE-2018-4317, CVE-2018-4318, CVE-2018-4319, CVE-2018-4323, CVE-2018-4328, CVE-2018-4358, CVE-2018-4359, CVE-2018-4361, CVE-2018-4345, CVE-2018-4372, CVE-2018-4373, CVE-2018-4375, CVE-2018-4376, CVE-2018-4416, CVE-2018-4378, CVE-2018-4382, CVE-2018-4386 (bsc#1110279, bsc#1116998). Note that Tenable Network Security has extracted the preceding description block directly from the SUSE 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 121093 published 2019-01-11 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/121093 title SUSE SLED12 / SLES12 Security Update : webkit2gtk3 (SUSE-SU-2019:0059-1) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-3743-1.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 111843 published 2018-08-17 reporter Ubuntu Security Notice (C) 2018-2019 Canonical, Inc. / NASL script (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/111843 title Ubuntu 16.04 LTS / 18.04 LTS : webkit2gtk vulnerabilities (USN-3743-1) NASL family MacOS X Local Security Checks NASL id MACOSX_SAFARI11_1_2.NASL description The version of Apple Safari installed on the remote macOS or Mac OS X host is prior to 11.1.2. It is, therefore, affected by multiple vulnerabilities as described in the HT208695 security advisory. last seen 2020-06-01 modified 2020-06-02 plugin id 111109 published 2018-07-16 reporter This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/111109 title macOS : Apple Safari < 11.1.2 Multiple Vulnerabilities
References
- https://support.apple.com/kb/HT208932
- https://support.apple.com/kb/HT208932
- https://support.apple.com/kb/HT208933
- https://support.apple.com/kb/HT208933
- https://support.apple.com/kb/HT208934
- https://support.apple.com/kb/HT208934
- https://support.apple.com/kb/HT208936
- https://support.apple.com/kb/HT208936
- https://support.apple.com/kb/HT208938
- https://support.apple.com/kb/HT208938