Vulnerabilities > CVE-2020-3846 - Improper Input Validation vulnerability in Apple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
HIGH Integrity impact
HIGH Availability impact
HIGH Summary
A buffer overflow was addressed with improved size validation. This issue is fixed in iOS 13.3.1 and iPadOS 13.3.1, macOS Catalina 10.15.3, tvOS 13.3.1, watchOS 6.1.2, iTunes for Windows 12.10.4, iCloud for Windows 11.0, iCloud for Windows 7.17. Processing maliciously crafted XML may lead to an unexpected application termination or arbitrary code execution.
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 Windows NASL id ITUNES_12_10_4.NASL description The version of Apple iTunes installed on the remote Windows host is prior to 12.10.4. It is, therefore, affected by multiple vulnerabilities as referenced in the HT210923 advisory. Note that Nessus has not tested for this issue but has instead relied only on the application last seen 2020-03-18 modified 2020-03-05 plugin id 134222 published 2020-03-05 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/134222 title Apple iTunes < 12.10.4 Multiple Vulnerabilities (credentialed check) code # # (C) Tenable Network Security, Inc. # include('compat.inc'); if (description) { script_id(134222); script_version("1.2"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/06"); script_cve_id( "CVE-2020-3825", "CVE-2020-3826", "CVE-2020-3846", "CVE-2020-3861", "CVE-2020-3862", "CVE-2020-3864", "CVE-2020-3865", "CVE-2020-3867", "CVE-2020-3868" ); script_xref(name:"APPLE-SA", value:"HT210923"); script_xref(name:"APPLE-SA", value:"APPLE-SA-2020-1-28-6"); script_name(english:"Apple iTunes < 12.10.4 Multiple Vulnerabilities (credentialed check)"); script_set_attribute(attribute:"synopsis", value: "An application installed on the remote host is affected by multiple vulnerabilities"); script_set_attribute(attribute:"description", value: "The version of Apple iTunes installed on the remote Windows host is prior to 12.10.4. It is, therefore, affected by multiple vulnerabilities as referenced in the HT210923 advisory. Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number."); script_set_attribute(attribute:"see_also", value:"https://support.apple.com/en-us/HT210923"); script_set_attribute(attribute:"solution", value: "Upgrade to Apple iTunes version 12.10.4 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:POC/RL:OF/RC:C"); 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_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C"); script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-3826"); 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:"2020/01/28"); script_set_attribute(attribute:"patch_publication_date", value:"2020/01/28"); script_set_attribute(attribute:"plugin_publication_date", value:"2020/03/05"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"cpe:/a:apple:itunes"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_family(english:"Windows"); script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof."); script_dependencies("itunes_detect.nasl"); script_require_keys("installed_sw/iTunes Version", "SMB/Registry/Enumerated"); exit(0); } include('vcf.inc'); get_kb_item_or_exit('SMB/Registry/Enumerated'); app_info = vcf::get_app_info(app:'iTunes Version', win_local:TRUE); constraints = [{'fixed_version':'12.10.4'}]; vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_HOLE);NASL family MacOS X Local Security Checks NASL id MACOS_HT210919.NASL description The remote host is running a version of macOS / Mac OS X that is 10.15.x prior to 10.15.3, 10.13.x prior to 10.13.6, 10.14.x prior to 10.14.6. It is, therefore, affected by multiple vulnerabilities: - In PHP versions 7.1.x below 7.1.33, 7.2.x below 7.2.24 and 7.3.x below 7.3.11 in certain configurations of FPM setup it is possible to cause FPM module to write past allocated buffers into the space reserved for FCGI protocol data, thus opening the possibility of remote code execution. (CVE-2019-11043) - An arbitrary code exution vulnerability exists due to a misconfiguration. An authenticated, local attacker can exploit this to execute arbitrary code on the remote host. (CVE-2019-18634) - An arbitrary code exution vulnerability exists due to the ability to process a maliciously crafted image. An unauthenticated, remote attacker can exploit this to execute arbitrary code on the remote host. (CVE-2020-3826 CVE-2020-3827 CVE-2020-3870 CVE-2020-3878) - A privilege escalation vulnerability exists in due to an out-of-bounds read issue. An unauthenticated, remote attacker can exploit this, to gain elevated access to the system. (CVE-2020-3829) - An arbitrary file write vulnerability exists in the handling of symlinks. A malicious program crafted by an attacker can exploit this to overwrite arbitrary files on the remote host. (CVE-2020-3830 CVE-2020-3835 CVE-2020-3855) - An information disclosure vulnerability exists in the access control handling of applications. A malicious application crafted by attacker can exploit this to disclose the kernel memory layout. (CVE-2020-3836) - An arbitrary code exution vulnerability exists due to a memory corruption issue. A malicious application crafted by a remote attacker may be able to execute arbitrary code with kernel privileges on the remote host. (CVE-2020-3837 CVE-2020-3842 CVE-2020-3871) - An arbitrary code exution vulnerability exists due to a permissions logic flaw. A malicious application crafted by a remote attacker may be able to execute arbitrary code with system privileges on the remote host. (CVE-2019-18634 CVE-2020-3854 CVE-2020-3845 CVE-2020-3853 CVE-2020-3857) - An information disclosure vulnerability exists in the input sanitization logic. A malicious application crafted by attacker can exploit this to read restricted memory. (CVE-2020-3839 CVE-2020-3847) - An arbitrary code exution vulnerability exists due to the loading of a maliciously crafted racoon configuration file. An authenticated, local attacker can exploit this to execute arbitrary code on the remote host. (CVE-2020-3840) - A denial of service (DoS) vulnerability exists due to a memory corruption issue. An unauthenticated, remote attacker can exploit this issue, via malicious input, to cause the system to crash, stop responding, or corrupt the kernel memory. (CVE-2020-3843) - An arbitrary code exution vulnerability exists due to either a buffer overflow or out-of-bounds read issue. An authenticated, local attacker can exploit this to execute arbitrary code on the remote host or cause an unexpected application to terminate. (CVE-2020-3846 CVE-2020-3848 CVE-2020-3849 CVE-2020-3850 CVE-2020-3877) - A memory corruption vulnerability exists due to a malicious crafted string. An unauthenticated, remote attacker can exploit this issue, via malicious input, to cause the corruption of the heap memory. (CVE-2020-3856) - An security bypass vulnerability exists in the handling of files from an attacker controlled NFS mount. A remote attacker with local access could search for and open a file from an attacker controlled NFS mount and bypass Gatekeeper Security features. (CVE-2020-3866) - An information disclosure vulnerability exists where an application can read restricted memory. A local, authorized attacker can exploit this to read restricted memory. (CVE-2020-3872 CVE-2020-3875) Note that Nessus has not tested for this issue but has instead relied only on the operating system last seen 2020-06-12 modified 2020-02-07 plugin id 133531 published 2020-02-07 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/133531 title macOS 10.15.x < 10.15.3 / 10.14.x < 10.14.6 / 10.13.x < 10.13.6 NASL family Peer-To-Peer File Sharing NASL id ITUNES_12_10_4_BANNER.NASL description The version of Apple iTunes installed on the remote Windows host is prior to 12.10.4. It is, therefore, affected by multiple vulnerabilities as referenced in the HT210923 advisory. Note that Nessus has not tested for this issue but has instead relied only on the application last seen 2020-03-18 modified 2020-03-05 plugin id 134221 published 2020-03-05 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/134221 title Apple iTunes < 12.10.4 Multiple Vulnerabilities (uncredentialed check)