Vulnerabilities > CVE-2017-2478 - Race Condition vulnerability in Apple products
Attack vector
LOCAL Attack complexity
HIGH Privileges required
NONE Confidentiality impact
HIGH Integrity impact
HIGH Availability impact
HIGH Summary
An issue was discovered in certain Apple products. iOS before 10.3 is affected. macOS before 10.12.4 is affected. tvOS before 10.2 is affected. watchOS before 3.2 is affected. The issue involves the "Kernel" component. A race condition allows attackers to execute arbitrary code in a privileged context via a crafted app.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Leveraging Race Conditions This attack targets a race condition occurring when multiple processes access and manipulate the same resource concurrently and the outcome of the execution depends on the particular order in which the access takes place. The attacker can leverage a race condition by "running the race", modifying the resource and modifying the normal execution flow. For instance a race condition can occur while accessing a file, the attacker can trick the system by replacing the original file with his version and cause the system to read the malicious file.
- Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions This attack targets a race condition occurring between the time of check (state) for a resource and the time of use of a resource. The typical example is the file access. The attacker can leverage a file access race condition by "running the race", meaning that he would modify the resource between the first time the target program accesses the file and the time the target program uses the file. During that period of time, the attacker could do something such as replace the file and cause an escalation of privilege.
Exploit-Db
| description | macOS/iOS Kernel 10.12.3 (16D32) - Bad Locking in necp_open Use-After-Free. CVE-2017-2478. Dos exploit for Multiple platform. Tags: Denial of Service (DoS) |
| file | exploits/multiple/dos/41794.c |
| id | EDB-ID:41794 |
| last seen | 2017-04-04 |
| modified | 2017-04-04 |
| platform | multiple |
| port | |
| published | 2017-04-04 |
| reporter | Exploit-DB |
| source | https://www.exploit-db.com/download/41794/ |
| title | macOS/iOS Kernel 10.12.3 (16D32) - Bad Locking in necp_open Use-After-Free |
| type | dos |
Nessus
NASL family MacOS X Local Security Checks NASL id MACOS_10_12_4.NASL description The remote host is running a version of macOS that is 10.12.x prior to 10.12.4. It is, therefore, affected by multiple vulnerabilities in multiple components, some of which are remote code execution vulnerabilities. An unauthenticated, remote attacker can exploit these remote code execution vulnerabilities by convincing a user to visit a specially crafted website, resulting in the execution of arbitrary code in the context of the current user. The affected components are as follows : - apache - apache_mod_php - AppleGraphicsPowerManagement - AppleRAID - Audio - Bluetooth - Carbon - CoreGraphics - CoreMedia - CoreText - curl - EFI - FinderKit - FontParser - HTTPProtocol - Hypervisor - iBooks - ImageIO - Intel Graphics Driver - IOATAFamily - IOFireWireAVC - IOFireWireFamily - Kernel - Keyboards - libarchive - libc++abi - LibreSSL - MCX Client - Menus - Multi-Touch - OpenSSH - OpenSSL - Printing - python - QuickTime - Security - SecurityFoundation - sudo - System Integrity Protection - tcpdump - tiffutil - WebKit last seen 2020-06-01 modified 2020-06-02 plugin id 99134 published 2017-03-31 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/99134 title macOS 10.12.x < 10.12.4 Multiple Vulnerabilities (httpoxy) code # # (C) Tenable Network Security, Inc. # include("compat.inc"); if (description) { script_id(99134); script_version("1.9"); script_cvs_date("Date: 2019/11/13"); script_cve_id( "CVE-2016-0736", "CVE-2016-2161", "CVE-2016-3619", "CVE-2016-4688", "CVE-2016-5387", "CVE-2016-5636", "CVE-2016-7056", "CVE-2016-7585", "CVE-2016-7922", "CVE-2016-7923", "CVE-2016-7924", "CVE-2016-7925", "CVE-2016-7926", "CVE-2016-7927", "CVE-2016-7928", "CVE-2016-7929", "CVE-2016-7930", "CVE-2016-7931", "CVE-2016-7932", "CVE-2016-7933", "CVE-2016-7934", "CVE-2016-7935", "CVE-2016-7936", "CVE-2016-7937", "CVE-2016-7938", "CVE-2016-7939", "CVE-2016-7940", "CVE-2016-7973", "CVE-2016-7974", "CVE-2016-7975", "CVE-2016-7983", "CVE-2016-7984", "CVE-2016-7985", "CVE-2016-7986", "CVE-2016-7992", "CVE-2016-7993", "CVE-2016-8574", "CVE-2016-8575", "CVE-2016-8740", "CVE-2016-8743", "CVE-2016-9533", "CVE-2016-9535", "CVE-2016-9536", "CVE-2016-9537", "CVE-2016-9538", "CVE-2016-9539", "CVE-2016-9540", "CVE-2016-9586", "CVE-2016-9935", "CVE-2016-10009", "CVE-2016-10010", "CVE-2016-10011", "CVE-2016-10012", "CVE-2016-10158", "CVE-2016-10159", "CVE-2016-10160", "CVE-2016-10161", "CVE-2017-2379", "CVE-2017-2381", "CVE-2017-2388", "CVE-2017-2390", "CVE-2017-2398", "CVE-2017-2401", "CVE-2017-2402", "CVE-2017-2403", "CVE-2017-2406", "CVE-2017-2407", "CVE-2017-2408", "CVE-2017-2409", "CVE-2017-2410", "CVE-2017-2413", "CVE-2017-2416", "CVE-2017-2417", "CVE-2017-2418", "CVE-2017-2420", "CVE-2017-2421", "CVE-2017-2422", "CVE-2017-2423", "CVE-2017-2425", "CVE-2017-2426", "CVE-2017-2427", "CVE-2017-2428", "CVE-2017-2429", "CVE-2017-2430", "CVE-2017-2431", "CVE-2017-2432", "CVE-2017-2435", "CVE-2017-2436", "CVE-2017-2437", "CVE-2017-2438", "CVE-2017-2439", "CVE-2017-2440", "CVE-2017-2441", "CVE-2017-2443", "CVE-2017-2448", "CVE-2017-2449", "CVE-2017-2450", "CVE-2017-2451", "CVE-2017-2456", "CVE-2017-2458", "CVE-2017-2461", "CVE-2017-2462", "CVE-2017-2467", "CVE-2017-2472", "CVE-2017-2473", "CVE-2017-2474", "CVE-2017-2477", "CVE-2017-2478", "CVE-2017-2482", "CVE-2017-2483", "CVE-2017-2485", "CVE-2017-2487", "CVE-2017-2489", "CVE-2017-2490", "CVE-2017-5029", "CVE-2017-5202", "CVE-2017-5203", "CVE-2017-5204", "CVE-2017-5205", "CVE-2017-5341", "CVE-2017-5342", "CVE-2017-5482", "CVE-2017-5483", "CVE-2017-5484", "CVE-2017-5485", "CVE-2017-5486", "CVE-2017-6974", "CVE-2017-7070" ); script_bugtraq_id( 85919, 91247, 91816, 94572, 94650, 94742, 94744, 94745, 94746, 94747, 94753, 94754, 94846, 94968, 94972, 94975, 94977, 95019, 95076, 95077, 95078, 95375, 95764, 95768, 95774, 95783, 95852, 96767, 97132, 97134, 97137, 97140, 97146, 97147, 97300, 97301, 97303 ); script_xref(name:"APPLE-SA", value:"APPLE-SA-2017-03-27-3"); script_xref(name:"CERT", value:"797896"); script_xref(name:"EDB-ID", value:"40961"); script_xref(name:"EDB-ID", value:"40962"); script_name(english:"macOS 10.12.x < 10.12.4 Multiple Vulnerabilities (httpoxy)"); script_summary(english:"Checks the version of 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 macOS that is 10.12.x prior to 10.12.4. It is, therefore, affected by multiple vulnerabilities in multiple components, some of which are remote code execution vulnerabilities. An unauthenticated, remote attacker can exploit these remote code execution vulnerabilities by convincing a user to visit a specially crafted website, resulting in the execution of arbitrary code in the context of the current user. The affected components are as follows : - apache - apache_mod_php - AppleGraphicsPowerManagement - AppleRAID - Audio - Bluetooth - Carbon - CoreGraphics - CoreMedia - CoreText - curl - EFI - FinderKit - FontParser - HTTPProtocol - Hypervisor - iBooks - ImageIO - Intel Graphics Driver - IOATAFamily - IOFireWireAVC - IOFireWireFamily - Kernel - Keyboards - libarchive - libc++abi - LibreSSL - MCX Client - Menus - Multi-Touch - OpenSSH - OpenSSL - Printing - python - QuickTime - Security - SecurityFoundation - sudo - System Integrity Protection - tcpdump - tiffutil - WebKit"); script_set_attribute(attribute:"see_also", value:"https://support.apple.com/en-us/HT207615"); # https://lists.apple.com/archives/security-announce/2017/Mar/msg00004.html script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?ddb4db4a"); script_set_attribute(attribute:"see_also", value:"https://httpoxy.org"); script_set_attribute(attribute:"solution", value: "Upgrade to macOS version 10.12.4 or later."); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C"); script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"); script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C"); script_set_attribute(attribute:"cvss_score_source", value:"CVE-2016-5636"); script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available"); script_set_attribute(attribute:"exploit_available", value:"true"); script_set_attribute(attribute:"in_the_news", value:"true"); script_set_attribute(attribute:"vuln_publication_date", value:"2016/01/21"); script_set_attribute(attribute:"patch_publication_date", value:"2017/03/27"); script_set_attribute(attribute:"plugin_publication_date", value:"2017/03/31"); script_set_attribute(attribute:"plugin_type", value:"combined"); script_set_attribute(attribute:"cpe", value:"cpe:/o:apple:macos"); 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 = eregmatch(pattern:"Mac OS X ([0-9]+(\.[0-9]+)+)", string:os); if (isnull(matches)) exit(1, "Failed to parse the macOS / Mac OS X version ('" + os + "')."); version = matches[1]; if (version !~ "^10\.12($|[^0-9])") audit(AUDIT_OS_NOT, "Mac OS 10.12.x"); fixed_version = "10.12.4"; if (ver_compare(ver:version, fix:fixed_version, strict:FALSE) == -1) { security_report_v4( port:0, severity:SECURITY_HOLE, xss:TRUE, 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_10_2.NASL description According to its banner, the version of Apple TV on the remote device is prior to 10.2. It is, therefore, affected by multiple vulnerabilities : - An out-of-bounds read error exists in LibTIFF in the DumpModeEncode() function within file tif_dumpmode.c. An unauthenticated, remote attacker can exploit this to crash a process linked against the library or disclose memory contents. (CVE-2016-3619) - An out-of-bounds read error exists in WebKit when handling certain JavaScript code. An unauthenticated, remote attacker can exploit this to cause a denial of service condition or the disclosure of memory contents. (CVE-2016-9642) - A denial of service vulnerability exists in WebKit when handling certain regular expressions. An unauthenticated, remote attacker can exploit this, via a specially crafted web page, to exhaust available memory resources. (CVE-2016-9643) - An information disclosure vulnerability exists in WebKit when handling page loading due to improper validation of certain input. An unauthenticated, remote attacker can exploit this to disclose data cross-origin. (CVE-2017-2367) - A buffer overflow condition exists in the Carbon component when handling specially crafted DFONT files due to improper validation of certain input. An unauthenticated, remote attacker can exploit this, via a specially crafted file, to cause a denial of service condition or the execution of arbitrary code. (CVE-2017-2379) - An information disclosure vulnerability exists in WebKit when handling unspecified exceptions. An unauthenticated, remote attacker can exploit this, via specially crafted web content, to disclose data cross-origin. (CVE-2017-2386) - A flaw exists in the libarchive component due to the insecure creation of temporary files. A local attacker can exploit this, by using a symlink attack against an unspecified file, to cause unexpected changes to be made to file system permissions. (CVE-2017-2390) - Multiple memory corruption issues exist in WebKit that allow an unauthenticated, remote attacker to cause a denial of service condition or the execution of arbitrary code. (CVE-2017-2394, CVE-2017-2395, CVE-2017-2396, CVE-2017-2454, CVE-2017-2455, CVE-2017-2459, CVE-2017-2460, CVE-2017-2464, CVE-2017-2465, CVE-2017-2466, CVE-2017-2468, CVE-2017-2469, CVE-2017-2470, CVE-2017-2476) - A memory corruption issue exists in the Kernel component due to improper validation of certain input. An unauthenticated, remote attacker can exploit this, by convincing a user to run a specially crafted application, to cause a denial of service condition or the execution or arbitrary code. (CVE-2017-2401) - Multiple memory corruption issues exist in the FontParser component when handling font files due to improper validation of certain input. An unauthenticated, remote attacker can exploit these to cause a denial condition or the execution of arbitrary code. (CVE-2017-2406, CVE-2017-2407, CVE-2017-2487) - An unspecified type confusion error exists in WebKit that allows an unauthenticated, remote attacker to execute arbitrary code by using specially crafted web content. (CVE-2017-2415) - A memory corruption issue exists in the ImageIO component, specifically in the GIFReadPlugin::init() function, when handling image files due to improper validation of certain input. An unauthenticated, remote attacker can exploit this, via a specially crafted image file, to cause a denial of service condition or the execution of arbitrary code. (CVE-2017-2416) - An infinite recursion condition exists in the CoreGraphics component when handling image files. An unauthenticated, remote can exploit this, via a specially crafted image file, to cause a denial of service condition. (CVE-2017-2417) - An unspecified flaw exists related to nghttp2 and LibreSSL. An unauthenticated, remote attacker can exploit this, by convincing a user to access a malicious HTTP/2 server, to have an unspecified impact on confidentiality, integrity, and availability. (CVE-2017-2428) - A type confusion error exists in the Audio component when parsing specially crafted M4A audio files due to improper validation of certain input. An unauthenticated, remote attacker can exploit this, via a specially crafted file, to cause a denial of service condition or the execution of arbitrary code. (CVE-2017-2430) - An integer overflow condition exists in the ImageIO component when handling JPEG files due to improper validation of certain input. An unauthenticated, remote attacker can exploit this, via a specially crafted file, to cause a denial of service condition or the execution of arbitrary code. (CVE-2017-2432) - A memory corruption issue exists in the CoreText component when handling font files due to improper validation of certain input. An unauthenticated, remote attacker can exploit this, via a specially crafted file, to cause a denial of service condition or the execution of arbitrary code. (CVE-2017-2435) - An out-of-bounds read error exists in the FontParser component when handling font files. An unauthenticated, remote attacker can exploit this, via a specially crafted file, to disclose process memory. (CVE-2017-2439) - An integer overflow condition exists in the Kernel component due to improper validation of certain input. An unauthenticated, remote attacker can exploit this, by convincing a user to run a specially crafted application, to execute arbitrary code with kernel-level privileges. (CVE-2017-2440) - A use-after-free error exists in libc++abi when demangling C++ applications. An unauthenticated, remote attacker can exploit this, by convincing a user to run a specially crafted application, to execute arbitrary code. (CVE-2017-2441) - A memory corruption issue exists in WebKit within the CoreGraphics component due to improper validation of certain input. An unauthenticated, remote attacker can exploit this, via specially crafted web content, to cause a denial of service condition or the execution of arbitrary code. (CVE-2017-2444) - A universal cross-site scripting (XSS) vulnerability exists in WebKit when handling frame objects due to improper validation of certain input. An unauthenticated, remote attacker can exploit this, via specially crafted web content, to execute arbitrary script code in a user last seen 2020-06-01 modified 2020-06-02 plugin id 99264 published 2017-04-10 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/99264 title Apple TV < 10.2 Multiple Vulnerabilities code # # (C) Tenable Network Security, Inc. # include("compat.inc"); if (description) { script_id(99264); script_version("1.9"); script_cvs_date("Date: 2019/11/13"); script_cve_id( "CVE-2016-3619", "CVE-2016-9642", "CVE-2016-9643", "CVE-2017-2367", "CVE-2017-2379", "CVE-2017-2386", "CVE-2017-2390", "CVE-2017-2394", "CVE-2017-2395", "CVE-2017-2396", "CVE-2017-2401", "CVE-2017-2406", "CVE-2017-2407", "CVE-2017-2415", "CVE-2017-2416", "CVE-2017-2417", "CVE-2017-2428", "CVE-2017-2430", "CVE-2017-2432", "CVE-2017-2435", "CVE-2017-2439", "CVE-2017-2440", "CVE-2017-2441", "CVE-2017-2444", "CVE-2017-2445", "CVE-2017-2446", "CVE-2017-2447", "CVE-2017-2448", "CVE-2017-2450", "CVE-2017-2451", "CVE-2017-2454", "CVE-2017-2455", "CVE-2017-2456", "CVE-2017-2458", "CVE-2017-2459", "CVE-2017-2460", "CVE-2017-2461", "CVE-2017-2462", "CVE-2017-2464", "CVE-2017-2465", "CVE-2017-2466", "CVE-2017-2467", "CVE-2017-2468", "CVE-2017-2469", "CVE-2017-2470", "CVE-2017-2472", "CVE-2017-2473", "CVE-2017-2474", "CVE-2017-2475", "CVE-2017-2476", "CVE-2017-2478", "CVE-2017-2481", "CVE-2017-2482", "CVE-2017-2483", "CVE-2017-2485", "CVE-2017-2487", "CVE-2017-2490", "CVE-2017-2491", "CVE-2017-2492" ); script_bugtraq_id( 85919, 94554, 94559, 97130, 97131, 97132, 97134, 97137, 97143, 97146, 97301, 98316 ); script_xref(name:"APPLE-SA", value:"APPLE-SA-2017-03-27-6"); script_name(english:"Apple TV < 10.2 Multiple Vulnerabilities"); script_summary(english:"Checks the build number."); script_set_attribute(attribute:"synopsis", value: "The remote Apple TV device is affected by multiple vulnerabilities."); script_set_attribute(attribute:"description", value: "According to its banner, the version of Apple TV on the remote device is prior to 10.2. It is, therefore, affected by multiple vulnerabilities : - An out-of-bounds read error exists in LibTIFF in the DumpModeEncode() function within file tif_dumpmode.c. An unauthenticated, remote attacker can exploit this to crash a process linked against the library or disclose memory contents. (CVE-2016-3619) - An out-of-bounds read error exists in WebKit when handling certain JavaScript code. An unauthenticated, remote attacker can exploit this to cause a denial of service condition or the disclosure of memory contents. (CVE-2016-9642) - A denial of service vulnerability exists in WebKit when handling certain regular expressions. An unauthenticated, remote attacker can exploit this, via a specially crafted web page, to exhaust available memory resources. (CVE-2016-9643) - An information disclosure vulnerability exists in WebKit when handling page loading due to improper validation of certain input. An unauthenticated, remote attacker can exploit this to disclose data cross-origin. (CVE-2017-2367) - A buffer overflow condition exists in the Carbon component when handling specially crafted DFONT files due to improper validation of certain input. An unauthenticated, remote attacker can exploit this, via a specially crafted file, to cause a denial of service condition or the execution of arbitrary code. (CVE-2017-2379) - An information disclosure vulnerability exists in WebKit when handling unspecified exceptions. An unauthenticated, remote attacker can exploit this, via specially crafted web content, to disclose data cross-origin. (CVE-2017-2386) - A flaw exists in the libarchive component due to the insecure creation of temporary files. A local attacker can exploit this, by using a symlink attack against an unspecified file, to cause unexpected changes to be made to file system permissions. (CVE-2017-2390) - Multiple memory corruption issues exist in WebKit that allow an unauthenticated, remote attacker to cause a denial of service condition or the execution of arbitrary code. (CVE-2017-2394, CVE-2017-2395, CVE-2017-2396, CVE-2017-2454, CVE-2017-2455, CVE-2017-2459, CVE-2017-2460, CVE-2017-2464, CVE-2017-2465, CVE-2017-2466, CVE-2017-2468, CVE-2017-2469, CVE-2017-2470, CVE-2017-2476) - A memory corruption issue exists in the Kernel component due to improper validation of certain input. An unauthenticated, remote attacker can exploit this, by convincing a user to run a specially crafted application, to cause a denial of service condition or the execution or arbitrary code. (CVE-2017-2401) - Multiple memory corruption issues exist in the FontParser component when handling font files due to improper validation of certain input. An unauthenticated, remote attacker can exploit these to cause a denial condition or the execution of arbitrary code. (CVE-2017-2406, CVE-2017-2407, CVE-2017-2487) - An unspecified type confusion error exists in WebKit that allows an unauthenticated, remote attacker to execute arbitrary code by using specially crafted web content. (CVE-2017-2415) - A memory corruption issue exists in the ImageIO component, specifically in the GIFReadPlugin::init() function, when handling image files due to improper validation of certain input. An unauthenticated, remote attacker can exploit this, via a specially crafted image file, to cause a denial of service condition or the execution of arbitrary code. (CVE-2017-2416) - An infinite recursion condition exists in the CoreGraphics component when handling image files. An unauthenticated, remote can exploit this, via a specially crafted image file, to cause a denial of service condition. (CVE-2017-2417) - An unspecified flaw exists related to nghttp2 and LibreSSL. An unauthenticated, remote attacker can exploit this, by convincing a user to access a malicious HTTP/2 server, to have an unspecified impact on confidentiality, integrity, and availability. (CVE-2017-2428) - A type confusion error exists in the Audio component when parsing specially crafted M4A audio files due to improper validation of certain input. An unauthenticated, remote attacker can exploit this, via a specially crafted file, to cause a denial of service condition or the execution of arbitrary code. (CVE-2017-2430) - An integer overflow condition exists in the ImageIO component when handling JPEG files due to improper validation of certain input. An unauthenticated, remote attacker can exploit this, via a specially crafted file, to cause a denial of service condition or the execution of arbitrary code. (CVE-2017-2432) - A memory corruption issue exists in the CoreText component when handling font files due to improper validation of certain input. An unauthenticated, remote attacker can exploit this, via a specially crafted file, to cause a denial of service condition or the execution of arbitrary code. (CVE-2017-2435) - An out-of-bounds read error exists in the FontParser component when handling font files. An unauthenticated, remote attacker can exploit this, via a specially crafted file, to disclose process memory. (CVE-2017-2439) - An integer overflow condition exists in the Kernel component due to improper validation of certain input. An unauthenticated, remote attacker can exploit this, by convincing a user to run a specially crafted application, to execute arbitrary code with kernel-level privileges. (CVE-2017-2440) - A use-after-free error exists in libc++abi when demangling C++ applications. An unauthenticated, remote attacker can exploit this, by convincing a user to run a specially crafted application, to execute arbitrary code. (CVE-2017-2441) - A memory corruption issue exists in WebKit within the CoreGraphics component due to improper validation of certain input. An unauthenticated, remote attacker can exploit this, via specially crafted web content, to cause a denial of service condition or the execution of arbitrary code. (CVE-2017-2444) - A universal cross-site scripting (XSS) vulnerability exists in WebKit when handling frame objects due to improper validation of certain input. An unauthenticated, remote attacker can exploit this, via specially crafted web content, to execute arbitrary script code in a user's browser session. (CVE-2017-2445) - A flaw exists in WebKit due to non-strict mode functions that are called from built-in strict mode scripts not being properly restricted from calling sensitive native functions. An unauthenticated, remote attacker can exploit this, via specially crafted web content, to execute arbitrary code. (CVE-2017-2446) - An out-of-bounds read error exists in WebKit when handling the bound arguments array of a bound function. An unauthenticated, remote attacker can exploit this, via specially crafted web content, to disclose memory contents. (CVE-2017-2447) - An unspecified flaw exists in the Security component due to improper validation of OTR packets under certain conditions. A man-in-the-middle attacker can exploit this to disclose and optionally manipulate transmitted data by spoofing the TLS/SSL server via a packet that appears to be valid. (CVE-2017-2448) - An out-of-bounds read error exists in CoreText component when handling font files. An unauthenticated, remote attacker can exploit this, via a specially crafted file, to disclose process memory. (CVE-2017-2450) - A buffer overflow condition exists in the Security component due to improper validation of certain input. An unauthenticated, remote attacker can exploit this, by convincing a user to run a specially crafted application, to execute arbitrary code with root root privileges. (CVE-2017-2451) - A race condition exists in the Kernel component when handling memory using the 'mach_msg' system call. An unauthenticated, remote attacker can exploit this, by convincing a user to run a specially crafted application, to cause a heap-based buffer overflow, resulting in a denial of service condition or the execution of arbitrary code with root privileges. CVE-2017-2456) - An buffer overflow condition exists in the Keyboards component due to improper validation of certain input. An unauthenticated, remote attacker can exploit this, by convincing a user to run a specially crafted application, to cause a denial of service condition or the execution of arbitrary code. (CVE-2017-2458) - A denial of service vulnerability exists in the CoreText component when handling specially crafted text messages due to improper validation of certain input. An unauthenticated, remote attacker can exploit this to exhaust available resources on the system. (CVE-2017-2461) - A heap buffer overflow condition exists in the Audio component when parsing specially crafted M4A audio files due to improper validation of certain input. An unauthenticated, remote attacker can exploit this, via a specially crafted file, to execute arbitrary code. (CVE-2017-2462) - An memory corruption issue exists in the ImageIO component when handling specially crafted files due to improper validation of certain input. An unauthenticated, remote attacker can exploit this, via a specially crafted file, to cause a denial of service condition or the execution of arbitrary code. (CVE-2017-2467) - A use-after-free error exists in the Kernel component in the XNU port actions extension due to improper handling of port references in error cases. An local attacker can exploit this to deference already freed memory, resulting in the execution of arbitrary code with kernel-level privileges. (CVE-2017-2472) - A signedness error exists in the Kernel component in the SIOCSIFORDER IOCTL due to improper validation of certain input. A local attacker can exploit this to cause an out-of-bounds read and memory corruption, resulting in a denial of service condition or the execution of arbitrary code with kernel-level privileges. (CVE-2017-2473) - A off-by-one overflow condition exists in the Kernel component in the SIOCSIFORDER IOCTL due to improper validation of certain input. A local attacker can exploit this to cause a heap-based buffer overflow, resulting in the execution of arbitrary code with kernel-level privileges. (CVE-2017-2474) - A universal cross-site scripting (XSS) vulnerability exists in WebKit when handling frames due to improper validation of certain input. An unauthenticated, remote attacker can exploit this, via specially crafted web content, to execute arbitrary script code in a user's browser session. (CVE-2017-2475) - A race condition exists in the Kernel component in the necp_open() function when closing files descriptors due to improper handling of proc_fd locks. A local attacker can exploit this to dereference already freed memory, resulting in the execution of arbitrary code with kernel-level privileges. (CVE-2017-2478) - A use-after-free error exists in WebKit when handling ElementData objects. An unauthenticated, remote attacker can exploit this, via specially crafted web content, to dereference already freed memory, resulting in the execution of arbitrary code. (CVE-2017-2481) - A heap buffer overflow condition exists in the Kernel component within the Berkeley Packet Filter (BPF) BIOCSBLEN IOCTL due to improper validation of certain input when reattaching to an interface. A local attacker can exploit this to cause a denial of service condition or the execution of arbitrary code with kernel-level privileges. (CVE-2017-2482) - An off-by-one error exists in the Kernel component, specifically in the audit_pipe_open() function, when handling auditpipe devices due to improper validation of certain input. A local attacker can exploit this to corrupt memory, resulting in a denial of service condition or the execution of arbitrary code with kernel-level privileges. (CVE-2017-2483) - An unspecified memory corruption issue exists in the Security component when parsing X.509 certificates due to improper validation of certain input. An unauthenticated, remote attacker can exploit this to cause a denial of service condition or the execution of arbitrary code. (CVE-2017-2485) - A double-free error exists in the Kernel component due to FSEVENTS_DEVICE_FILTER_64 IOCTL not properly locking devices. A local attacker can exploit this to corrupt memory, resulting in the execution of arbitrary code with elevated privileges. (CVE-2017-2490) - A use-after-free error exists in JavaScriptCore when handling the String.replace() method. An unauthenticated, remote attacker can exploit this to deference already freed memory, resulting in the execution of arbitrary code. (CVE-2017-2491) - A universal cross-site scripting (XSS) vulnerability exists in JavaScriptCore due to an unspecified prototype flaw. An unauthenticated, remote attacker can exploit this, via a specially crafted web page, to execute arbitrary code in a user's browser session. (CVE-2017-2492) Note that only 4th generation models are affected by these vulnerabilities."); script_set_attribute(attribute:"see_also", value:"https://support.apple.com/en-us/HT207601"); # https://lists.apple.com/archives/security-announce/2017/Mar/msg00007.html script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b1dbb626"); script_set_attribute(attribute:"solution", value: "Upgrade to Apple TV version 10.2 or later. Note that this update is only available for 4th generation models."); 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:POC/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:P/RL:O/RC:C"); script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-2490"); script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available"); script_set_attribute(attribute:"exploit_available", value:"true"); script_set_attribute(attribute:"vuln_publication_date", value:"2016/04/07"); script_set_attribute(attribute:"patch_publication_date", value:"2017/03/27"); script_set_attribute(attribute:"plugin_publication_date", value:"2017/04/10"); script_set_attribute(attribute:"plugin_type", value:"remote"); script_set_attribute(attribute:"cpe", value:"cpe:/a:apple:apple_tv"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_family(english:"Misc."); script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof."); script_dependencies("appletv_version.nasl"); script_require_keys("AppleTV/Version", "AppleTV/Model", "AppleTV/URL", "AppleTV/Port"); script_require_ports("Services/www", 7000); exit(0); } include("audit.inc"); include("appletv_func.inc"); url = get_kb_item('AppleTV/URL'); if (empty_or_null(url)) exit(0, 'Cannot determine Apple TV URL.'); port = get_kb_item('AppleTV/Port'); if (empty_or_null(port)) exit(0, 'Cannot determine Apple TV port.'); build = get_kb_item('AppleTV/Version'); if (empty_or_null(build)) audit(AUDIT_UNKNOWN_DEVICE_VER, 'Apple TV'); model = get_kb_item('AppleTV/Model'); if (empty_or_null(model)) exit(0, 'Cannot determine Apple TV model.'); fixed_build = "14W265"; tvos_ver = '10.2'; # determine gen from the model gen = APPLETV_MODEL_GEN[model]; appletv_check_version( build : build, fix : fixed_build, affected_gen : 4, fix_tvos_ver : tvos_ver, model : model, gen : gen, port : port, url : url, severity : SECURITY_HOLE, xss : TRUE );
Seebug
| bulletinFamily | exploit |
| description | necp_open is a syscall used to obtain a new necp file descriptor The necp file's fp's fg_data points to a struct necp_fd_data allocated on the heap. Here's the relevant code from necp_open: `` error = falloc(p, &fp, &fd, vfs_context_current()); <\--------------------- (a) if (error != 0) { goto done; } if ((fd_data = _MALLOC(sizeof(struct necp_fd_data), M_NECP, M_WAITOK | M_ZERO)) == NULL) { error = ENOMEM; goto done; } fd_data->flags = uap->flags; LIST_INIT(&fd_data->clients); lck_mtx_init(&fd_data->fd_lock, necp_fd_mtx_grp, necp_fd_mtx_attr); klist_init(&fd_data->si. si_note); fd_data->proc_pid = proc_pid(p); fp->f_fglob->fg_flag = FREAD; fp->f_fglob->fg_ops = &necp_fd_ops; fp->f_fglob->fg_data = fd_data; <\-------------------------- (b) proc_fdlock(p); *fdflags(p, fd) |= (UF_EXCLOSE | UF_FORKCLOSE); procfdtbl_releasefd(p, fd, NULL); fp_drop(p, fd, fp, 1); proc_fdunlock(p); <\--------------------- (c) *retval = fd; lck_rw_lock_exclusive(&necp_fd_lock); <\---------------- (d) LIST_INSERT_HEAD(&necp_fd_list, fd_data, chain); <\------(e) lck_rw_done(&necp_fd_lock); `` at (a) a new file descriptor and file object is allocated for the calling process at (b) that the new file's fg_data is set to the fd_data heap allocation at (c) the process fd table is unlocked meaning that other processes can now look up the new fd and get the associated fp at (d) the necp_fd_lock is taken then at (e) the fd_data is enqueued into the necp_fd_list The bug is that the fd_data is owned by the fp so that after we drop the proc_fd lock at (c) another thread can call close on the new fd which will free fd_data before we enqueue it at (e). tested on MacOS 10.12.3 (16D32) on MacbookAir5,2 Attachment: [necp_open. c](<https://bugs.chromium.org/p/project-zero/issues/attachment?aid=270104>) |
| id | SSV:92889 |
| last seen | 2017-11-19 |
| modified | 2017-04-04 |
| published | 2017-04-04 |
| reporter | Root |
| title | MacOS/iOS kernel uaf due to bad locking in necp_open (CVE-2017-2478) |
References
- http://www.securityfocus.com/bid/97137
- http://www.securityfocus.com/bid/97137
- http://www.securitytracker.com/id/1038138
- http://www.securitytracker.com/id/1038138
- https://support.apple.com/HT207601
- https://support.apple.com/HT207601
- https://support.apple.com/HT207602
- https://support.apple.com/HT207602
- https://support.apple.com/HT207615
- https://support.apple.com/HT207615
- https://support.apple.com/HT207617
- https://support.apple.com/HT207617
- https://www.exploit-db.com/exploits/41794/
- https://www.exploit-db.com/exploits/41794/