Vulnerabilities > CVE-2017-13868 - Information Exposure vulnerability in Apple products
Attack vector
LOCAL Attack complexity
LOW Privileges required
NONE Confidentiality impact
HIGH Integrity impact
NONE Availability impact
NONE Summary
An issue was discovered in certain Apple products. iOS before 11.2 is affected. macOS before 10.13.2 is affected. tvOS before 11.2 is affected. watchOS before 4.2 is affected. The issue involves the "Kernel" component. It allows attackers to bypass intended memory-read restrictions via a crafted app.
Vulnerable Configurations
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.
Exploit-Db
| description | Apple macOS High Sierra 10.13 - 'ctl_ctloutput-leak' Information Leak. CVE-2017-13868. Local exploit for macOS platform |
| id | EDB-ID:44234 |
| last seen | 2018-03-03 |
| modified | 2017-12-07 |
| published | 2017-12-07 |
| reporter | Exploit-DB |
| source | https://www.exploit-db.com/download/44234/ |
| title | Apple macOS High Sierra 10.13 - 'ctl_ctloutput-leak' Information Leak |
Nessus
NASL family MacOS X Local Security Checks NASL id MACOS_10_13_2.NASL description The remote host is running a version of Mac OS X that is 10.13.x prior to 10.13.2. It is, therefore, affected by multiple vulnerabilities in the following components : - apache - curl - Directory Utility - IOAcceleratorFamily - IOKit - Intel Graphics Driver - Kernel - Mail - Mail Drafts - OpenSSL - Screen Sharing Server Note that successful exploitation of the most serious issues can result in arbitrary code execution. last seen 2020-06-01 modified 2020-06-02 plugin id 105080 published 2017-12-07 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/105080 title macOS 10.13.x < 10.13.2 Multiple Vulnerabilities (Meltdown) code # # (C) Tenable Network Security, Inc. # include("compat.inc"); if (description) { script_id(105080); script_version("1.12"); script_cvs_date("Date: 2019/06/19 15:17:43"); script_cve_id( "CVE-2017-1000254", "CVE-2017-13847", "CVE-2017-13848", "CVE-2017-13855", "CVE-2017-13858", "CVE-2017-13860", "CVE-2017-13862", "CVE-2017-13865", "CVE-2017-13867", "CVE-2017-13868", "CVE-2017-13869", "CVE-2017-13871", "CVE-2017-13872", "CVE-2017-13875", "CVE-2017-13876", "CVE-2017-13878", "CVE-2017-13883", "CVE-2017-13886", "CVE-2017-13887", "CVE-2017-13892", "CVE-2017-13904", "CVE-2017-13905", "CVE-2017-13911", "CVE-2017-15422", "CVE-2017-3735", "CVE-2017-5754", "CVE-2017-7151", "CVE-2017-7154", "CVE-2017-7155", "CVE-2017-7158", "CVE-2017-7159", "CVE-2017-7162", "CVE-2017-7163", "CVE-2017-7171", "CVE-2017-7172", "CVE-2017-7173", "CVE-2017-9798" ); script_bugtraq_id( 100515, 100872, 101115, 101981, 102097, 102098, 102099, 102100, 102378, 103134, 103135 ); script_xref(name:"IAVA", value:"2018-A-0019"); script_name(english:"macOS 10.13.x < 10.13.2 Multiple Vulnerabilities (Meltdown)"); script_summary(english:"Checks the version of Mac OS X / macOS."); script_set_attribute(attribute:"synopsis", value: "The remote host is missing a macOS update that fixes multiple security vulnerabilities."); script_set_attribute(attribute:"description", value: "The remote host is running a version of Mac OS X that is 10.13.x prior to 10.13.2. It is, therefore, affected by multiple vulnerabilities in the following components : - apache - curl - Directory Utility - IOAcceleratorFamily - IOKit - Intel Graphics Driver - Kernel - Mail - Mail Drafts - OpenSSL - Screen Sharing Server Note that successful exploitation of the most serious issues can result in arbitrary code execution."); script_set_attribute(attribute:"see_also", value:"https://support.apple.com/en-us/HT208331"); script_set_attribute(attribute:"see_also", value:"https://support.apple.com/en-us/HT208394"); script_set_attribute(attribute:"solution", value: "Upgrade to macOS version 10.13.2 or later."); script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C"); script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"); script_set_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:C"); script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-7172"); script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available"); script_set_attribute(attribute:"exploit_available", value:"true"); script_set_attribute(attribute:"exploited_by_malware", value:"true"); script_set_attribute(attribute:"metasploit_name", value:'Mac OS X Root Privilege Escalation'); script_set_attribute(attribute:"exploit_framework_metasploit", value:"true"); script_set_attribute(attribute:"vuln_publication_date", value:"2017/12/06"); script_set_attribute(attribute:"patch_publication_date", value:"2017/12/06"); script_set_attribute(attribute:"plugin_publication_date", value:"2017/12/07"); script_set_attribute(attribute:"plugin_type", value:"combined"); script_set_attribute(attribute:"cpe", value:"cpe:/o:apple:mac_os_x"); script_set_attribute(attribute:"cpe", value:"cpe:/o:apple:macos"); script_set_attribute(attribute:"stig_severity", value:"I"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_family(english:"MacOS X Local Security Checks"); script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof."); script_dependencies("ssh_get_info.nasl", "os_fingerprint.nasl"); script_require_ports("Host/MacOSX/Version", "Host/OS"); exit(0); } include("audit.inc"); include("global_settings.inc"); include("misc_func.inc"); os = get_kb_item("Host/MacOSX/Version"); if (!os) { os = get_kb_item_or_exit("Host/OS"); if ("Mac OS X" >!< os) audit(AUDIT_OS_NOT, "macOS / Mac OS X"); c = get_kb_item("Host/OS/Confidence"); if (c <= 70) exit(1, "Can't determine the host's OS with sufficient confidence."); } if (!os) audit(AUDIT_OS_NOT, "macOS / Mac OS X"); matches = pregmatch(pattern:"Mac OS X ([0-9]+(\.[0-9]+)+)", string:os); if (empty_or_null(matches)) exit(1, "Failed to parse the macOS / Mac OS X version ('" + os + "')."); version = matches[1]; fixed_version = "10.13.2"; if (version !~"^10\.13($|[^0-9])") audit(AUDIT_OS_NOT, "macOS 10.13.x"); if (ver_compare(ver:version, fix:'10.13.2', strict:FALSE) == -1) { security_report_v4( port:0, severity:SECURITY_HOLE, extra: '\n Installed version : ' + version + '\n Fixed version : ' + fixed_version + '\n' ); } else audit(AUDIT_INST_VER_NOT_VULN, "macOS / Mac OS X", version);NASL family Misc. NASL id APPLETV_11_2.NASL description According to its banner, the version of Apple TV on the remote device is prior to 11.2. It is, therefore, affected by multiple vulnerabilities as described in the HT208327 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 105612 published 2018-01-05 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/105612 title Apple TV < 11.2 Multiple Vulnerabilities NASL family MacOS X Local Security Checks NASL id MACOSX_SECUPD2017-005.NASL description The remote host is running Mac OS X 10.11.6 or Mac OS X 10.12.6 and is missing a security update. It is therefore, affected by multiple vulnerabilities affecting the following components : - apache - curl - IOAcceleratorFamily - IOKit - Kernel - OpenSSL - Screen Sharing Server last seen 2020-06-01 modified 2020-06-02 plugin id 105081 published 2017-12-07 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/105081 title macOS and Mac OS X Multiple Vulnerabilities (Security Update 2017-002 and 2017-005)
References
- https://support.apple.com/HT208334
- https://support.apple.com/HT208331
- https://support.apple.com/HT208327
- https://support.apple.com/HT208325
- http://www.securitytracker.com/id/1039966
- http://www.securitytracker.com/id/1039953
- http://www.securitytracker.com/id/1039952
- http://www.securityfocus.com/bid/102100
- https://github.com/bazad/ctl_ctloutput-leak
- https://bazad.github.io/2018/03/a-fun-xnu-infoleak/