Vulnerabilities > CVE-2020-9611 - Resource Exhaustion vulnerability in Adobe Acrobat DC
Attack vector
LOCAL Attack complexity
LOW Privileges required
NONE Confidentiality impact
NONE Integrity impact
NONE Availability impact
HIGH Summary
Adobe Acrobat and Reader versions 2020.006.20042 and earlier, 2017.011.30166 and earlier, 2017.011.30166 and earlier, and 2015.006.30518 and earlier have a stack exhaustion vulnerability. Successful exploitation could lead to application denial-of-service.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- XML Ping of the Death An attacker initiates a resource depletion attack where a large number of small XML messages are delivered at a sufficiently rapid rate to cause a denial of service or crash of the target. Transactions such as repetitive SOAP transactions can deplete resources faster than a simple flooding attack because of the additional resources used by the SOAP protocol and the resources necessary to process SOAP messages. The transactions used are immaterial as long as they cause resource utilization on the target. In other words, this is a normal flooding attack augmented by using messages that will require extra processing on the target.
- XML Entity Expansion An attacker submits an XML document to a target application where the XML document uses nested entity expansion to produce an excessively large output XML. XML allows the definition of macro-like structures that can be used to simplify the creation of complex structures. However, this capability can be abused to create excessive demands on a processor's CPU and memory. A small number of nested expansions can result in an exponential growth in demands on memory.
- Inducing Account Lockout An attacker leverages the security functionality of the system aimed at thwarting potential attacks to launch a denial of service attack against a legitimate system user. Many systems, for instance, implement a password throttling mechanism that locks an account after a certain number of incorrect log in attempts. An attacker can leverage this throttling mechanism to lock a legitimate user out of their own account. The weakness that is being leveraged by an attacker is the very security feature that has been put in place to counteract attacks.
- Violating Implicit Assumptions Regarding XML Content (aka XML Denial of Service (XDoS)) XML Denial of Service (XDoS) can be applied to any technology that utilizes XML data. This is, of course, most distributed systems technology including Java, .Net, databases, and so on. XDoS is most closely associated with web services, SOAP, and Rest, because remote service requesters can post malicious XML payloads to the service provider designed to exhaust the service provider's memory, CPU, and/or disk space. The main weakness in XDoS is that the service provider generally must inspect, parse, and validate the XML messages to determine routing, workflow, security considerations, and so on. It is exactly these inspection, parsing, and validation routines that XDoS targets. There are three primary attack vectors that XDoS can navigate Target CPU through recursion: attacker creates a recursive payload and sends to service provider Target memory through jumbo payloads: service provider uses DOM to parse XML. DOM creates in memory representation of XML document, but when document is very large (for example, north of 1 Gb) service provider host may exhaust memory trying to build memory objects. XML Ping of death: attack service provider with numerous small files that clog the system. All of the above attacks exploit the loosely coupled nature of web services, where the service provider has little to no control over the service requester and any messages the service requester sends.
Nessus
NASL family Windows NASL id ADOBE_READER_APSB20-24.NASL description The version of Adobe Reader installed on the remote Windows host is a version prior or equal to 2015.006.30518, 2017.011.30166, or 2020.006.20042. It is, therefore, affected by multiple vulnerabilities. - Null Pointer potentially leading to Application denial- of-service (CVE-2020-9610) - Heap Overflow potentially leading to Arbitrary Code Execution (CVE-2020-9612) - Race Condition potentially leading to Security feature bypass (CVE-2020-9615) - Out-of-bounds write potentially leading to Arbitrary Code Execution (CVE-2020-9594, CVE-2020-9597) - Security bypass potentially leading to Security feature bypass (CVE-2020-9592, CVE-2020-9596, CVE-2020-9613, CVE-2020-9614) - Stack exhaustion potentially leading to Application denial-of-service (CVE-2020-9611) - Out-of-bounds read potentially leading to Information disclosure (CVE-2020-9599, CVE-2020-9600, CVE-2020-9601, CVE-2020-9602, CVE-2020-9603, CVE-2020-9608, CVE-2020-9609) - Buffer error potentially leading to Arbitrary Code Execution (CVE-2020-9604, CVE-2020-9605) - Use-after-free potentially leading to Arbitrary Code Execution (CVE-2020-9606, CVE-2020-9607) - Invalid memory access potentially leading to Information disclosure (CVE-2020-9593, CVE-2020-9595, CVE-2020-9598) Note that Nessus has not tested for this issue but has instead relied only on the application last seen 2020-05-18 modified 2020-05-13 plugin id 136563 published 2020-05-13 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/136563 title Adobe Reader <= 2015.006.30518 / 2017.011.30166 / 2020.006.20042 Multiple Vulnerabilities (APSB20-24) code # # (C) Tenable Network Security, Inc. # include('compat.inc'); if (description) { script_id(136563); script_version("1.5"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/07/27"); script_cve_id( "CVE-2020-9592", "CVE-2020-9593", "CVE-2020-9594", "CVE-2020-9595", "CVE-2020-9596", "CVE-2020-9597", "CVE-2020-9598", "CVE-2020-9599", "CVE-2020-9600", "CVE-2020-9601", "CVE-2020-9602", "CVE-2020-9603", "CVE-2020-9604", "CVE-2020-9605", "CVE-2020-9606", "CVE-2020-9607", "CVE-2020-9608", "CVE-2020-9609", "CVE-2020-9610", "CVE-2020-9611", "CVE-2020-9612", "CVE-2020-9613", "CVE-2020-9614", "CVE-2020-9615" ); script_xref(name:"IAVA", value:"2020-A-0211"); script_name(english:"Adobe Reader <= 2015.006.30518 / 2017.011.30166 / 2020.006.20042 Multiple Vulnerabilities (APSB20-24)"); script_set_attribute(attribute:"synopsis", value: "The version of Adobe Reader installed on the remote Windows host is affected by multiple vulnerabilities."); script_set_attribute(attribute:"description", value: "The version of Adobe Reader installed on the remote Windows host is a version prior or equal to 2015.006.30518, 2017.011.30166, or 2020.006.20042. It is, therefore, affected by multiple vulnerabilities. - Null Pointer potentially leading to Application denial- of-service (CVE-2020-9610) - Heap Overflow potentially leading to Arbitrary Code Execution (CVE-2020-9612) - Race Condition potentially leading to Security feature bypass (CVE-2020-9615) - Out-of-bounds write potentially leading to Arbitrary Code Execution (CVE-2020-9594, CVE-2020-9597) - Security bypass potentially leading to Security feature bypass (CVE-2020-9592, CVE-2020-9596, CVE-2020-9613, CVE-2020-9614) - Stack exhaustion potentially leading to Application denial-of-service (CVE-2020-9611) - Out-of-bounds read potentially leading to Information disclosure (CVE-2020-9599, CVE-2020-9600, CVE-2020-9601, CVE-2020-9602, CVE-2020-9603, CVE-2020-9608, CVE-2020-9609) - Buffer error potentially leading to Arbitrary Code Execution (CVE-2020-9604, CVE-2020-9605) - Use-after-free potentially leading to Arbitrary Code Execution (CVE-2020-9606, CVE-2020-9607) - Invalid memory access potentially leading to Information disclosure (CVE-2020-9593, CVE-2020-9595, CVE-2020-9598) 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://helpx.adobe.com/security/products/acrobat/apsb20-24.html"); script_set_attribute(attribute:"solution", value: "Upgrade to Adobe Reader version 2015.006.30523 or 2017.011.30171 or 2020.009.20063 or later."); script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P"); script_set_cvss_temporal_vector("CVSS2#E:U/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:U/RL:O/RC:C"); script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-9614"); script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available"); script_set_attribute(attribute:"exploit_available", value:"true"); script_set_attribute(attribute:"exploited_by_malware", value:"true"); script_set_attribute(attribute:"vuln_publication_date", value:"2020/05/12"); script_set_attribute(attribute:"patch_publication_date", value:"2020/05/12"); script_set_attribute(attribute:"plugin_publication_date", value:"2020/05/13"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"cpe:/a:adobe:acrobat_reader"); script_set_attribute(attribute:"stig_severity", value:"I"); 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("adobe_reader_installed.nasl"); script_require_keys("SMB/Registry/Enumerated", "installed_sw/Adobe Reader"); exit(0); } include('vcf.inc'); include('vcf_extras.inc'); get_kb_item_or_exit('SMB/Registry/Enumerated'); app_info = vcf::get_app_info(app:'Adobe Reader', win_local:TRUE); # vcf::adobe_reader::check_version_and_report will # properly separate tracks when checking constraints. # x.y.30zzz = DC Classic # x.y.20zzz = DC Continuous constraints = [ { 'min_version' : '15.6', 'max_version' : '15.006.30518', 'fixed_version' : '15.006.30523' }, { 'min_version' : '17.8', 'max_version' : '17.011.30166', 'fixed_version' : '17.011.30171' }, { 'min_version' : '15.7', 'max_version' : '20.006.20042', 'fixed_version' : '20.009.20063' } ]; vcf::adobe_reader::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_WARNING, max_segs:3);
NASL family MacOS X Local Security Checks NASL id MACOS_ADOBE_READER_APSB20-24.NASL description The version of Adobe Reader installed on the remote macOS host is a version prior or equal to 2015.006.30518, 2017.011.30166, or 2020.006.20042. It is, therefore, affected by multiple vulnerabilities. - Null Pointer potentially leading to Application denial- of-service (CVE-2020-9610) - Heap Overflow potentially leading to Arbitrary Code Execution (CVE-2020-9612) - Race Condition potentially leading to Security feature bypass (CVE-2020-9615) - Out-of-bounds write potentially leading to Arbitrary Code Execution (CVE-2020-9594, CVE-2020-9597) - Security bypass potentially leading to Security feature bypass (CVE-2020-9592, CVE-2020-9596, CVE-2020-9613, CVE-2020-9614) - Stack exhaustion potentially leading to Application denial-of-service (CVE-2020-9611) - Out-of-bounds read potentially leading to Information disclosure (CVE-2020-9599, CVE-2020-9600, CVE-2020-9601, CVE-2020-9602, CVE-2020-9603, CVE-2020-9608, CVE-2020-9609) - Buffer error potentially leading to Arbitrary Code Execution (CVE-2020-9604, CVE-2020-9605) - Use-after-free potentially leading to Arbitrary Code Execution (CVE-2020-9606, CVE-2020-9607) - Invalid memory access potentially leading to Information disclosure (CVE-2020-9593, CVE-2020-9595, CVE-2020-9598) Note that Nessus has not tested for this issue but has instead relied only on the application last seen 2020-05-18 modified 2020-05-13 plugin id 136561 published 2020-05-13 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/136561 title Adobe Reader <= 2015.006.30518 / 2017.011.30166 / 2020.006.20042 Multiple Vulnerabilities (APSB20-24) (macOS) NASL family Windows NASL id ADOBE_ACROBAT_APSB20-24.NASL description The version of Adobe Acrobat installed on the remote Windows host is a version prior or equal to 2015.006.30518, 2017.011.30166, or 2020.006.20042. It is, therefore, affected by multiple vulnerabilities. - Null Pointer potentially leading to Application denial- of-service (CVE-2020-9610) - Heap Overflow potentially leading to Arbitrary Code Execution (CVE-2020-9612) - Race Condition potentially leading to Security feature bypass (CVE-2020-9615) - Out-of-bounds write potentially leading to Arbitrary Code Execution (CVE-2020-9594, CVE-2020-9597) - Security bypass potentially leading to Security feature bypass (CVE-2020-9592, CVE-2020-9596, CVE-2020-9613, CVE-2020-9614) - Stack exhaustion potentially leading to Application denial-of-service (CVE-2020-9611) - Out-of-bounds read potentially leading to Information disclosure (CVE-2020-9599, CVE-2020-9600, CVE-2020-9601, CVE-2020-9602, CVE-2020-9603, CVE-2020-9608, CVE-2020-9609) - Buffer error potentially leading to Arbitrary Code Execution (CVE-2020-9604, CVE-2020-9605) - Use-after-free potentially leading to Arbitrary Code Execution (CVE-2020-9606, CVE-2020-9607) - Invalid memory access potentially leading to Information disclosure (CVE-2020-9593, CVE-2020-9595, CVE-2020-9598) Note that Nessus has not tested for this issue but has instead relied only on the application last seen 2020-05-18 modified 2020-05-13 plugin id 136562 published 2020-05-13 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/136562 title Adobe Acrobat <= 2015.006.30518 / 2017.011.30166 / 2020.006.20042 Multiple Vulnerabilities (APSB20-24) NASL family MacOS X Local Security Checks NASL id MACOS_ADOBE_ACROBAT_APSB20-24.NASL description The version of Adobe Acrobat installed on the remote macOS host is a version prior or equal to 2015.006.30518, 2017.011.30166, or 2020.006.20042. It is, therefore, affected by multiple vulnerabilities. - Null Pointer potentially leading to Application denial- of-service (CVE-2020-9610) - Heap Overflow potentially leading to Arbitrary Code Execution (CVE-2020-9612) - Race Condition potentially leading to Security feature bypass (CVE-2020-9615) - Out-of-bounds write potentially leading to Arbitrary Code Execution (CVE-2020-9594, CVE-2020-9597) - Security bypass potentially leading to Security feature bypass (CVE-2020-9592, CVE-2020-9596, CVE-2020-9613, CVE-2020-9614) - Stack exhaustion potentially leading to Application denial-of-service (CVE-2020-9611) - Out-of-bounds read potentially leading to Information disclosure (CVE-2020-9599, CVE-2020-9600, CVE-2020-9601, CVE-2020-9602, CVE-2020-9603, CVE-2020-9608, CVE-2020-9609) - Buffer error potentially leading to Arbitrary Code Execution (CVE-2020-9604, CVE-2020-9605) - Use-after-free potentially leading to Arbitrary Code Execution (CVE-2020-9606, CVE-2020-9607) - Invalid memory access potentially leading to Information disclosure (CVE-2020-9593, CVE-2020-9595, CVE-2020-9598) Note that Nessus has not tested for this issue but has instead relied only on the application last seen 2020-05-18 modified 2020-05-13 plugin id 136560 published 2020-05-13 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/136560 title Adobe Acrobat <= 2015.006.30518 / 2017.011.30166 / 2020.006.20042 Multiple Vulnerabilities (APSB20-24) (macOS)