CVE-2020-3872 - Improper Restriction of Operations Within the Bounds of A Memory Buffer vulnerability in Apple products

047910
CVSS 4.3 - MEDIUM
Attack vector
NETWORK
Attack complexity
MEDIUM
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
NONE
Availability impact
NONE

Summary

A memory initialization issue was addressed with improved memory handling. 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. An application may be able to read restricted memory.

Vulnerable Configurations

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 familyMacOS X Local Security Checks
    NASL idMACOS_HT210919.NASL
    descriptionThe 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 seen2020-06-12
    modified2020-02-07
    plugin id133531
    published2020-02-07
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/133531
    titlemacOS 10.15.x < 10.15.3 / 10.14.x < 10.14.6 / 10.13.x < 10.13.6
  • NASL familyMisc.
    NASL idAPPLETV_13_3_1.NASL
    descriptionAccording to its banner, the version of Apple TV on the remote device is prior to 13.3.1. It is therefore affected by multiple vulnerabilities as described in the HT210920
    last seen2020-03-17
    modified2020-02-18
    plugin id133727
    published2020-02-18
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/133727
    titleApple TV < 13.3.1 Multiple Vulnerabilities