alirezaaminzadeh/secembed-pairs huggingface dataset:
Query: describe CVE-2015-9175
Matching passage: CVE-2015-9175. CWE: CWE-476. CVSS: 9.800000190734863. In Android before 2018-04-05 or earlier security patch level on Qualcomm Snapdragon Automobile, Snapdragon Mobile, and Snapdragon Wear MDM9206, MDM9650, MSM8909W, SD 210/SD 212/SD 205, SD 400, SD 410/12, SD 425, SD 430, SD 450, SD 615/16/SD 415, SD 617, SD 625, SD 650/52, SD 800, SD 808, SD 810, SD 820, SD 820A, SD 835, SD 845, and SD 850, lack of input validation could lead to an untrusted pointer dereference in wv_dash_core_generic_verify().
Near-miss passage: CVE-2015-1721. CWE: CWE-476. CVSS: 7.199999809265137. The kernel-mode drivers in Microsoft Windows Server 2003 SP2 and R2 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, and Windows RT Gold and 8.1 allow local users to gain privileges or cause a denial of service (NULL pointer dereference and system crash) via a crafted application, aka "Win32k Null Pointer Dereference Vulnerability."
Query: playbook for alert: Encoded PowerShell / command-line abuse matching Change Default File Association
Matching passage: Playbook for T1546.001 Change Default File Association. 1) Validate alert telemetry against T1546.001. 2) Scope affected hosts and accounts. 3) Contain by isolating endpoint / disabling account if confirmed. 4) Hunt for related tactics: privilege escalation, persistence. 5) Eradicate persistence and recover. Reference detection notes: Adversaries may establish persistence by executing malicious content triggered by a file type association. When a file is opened, the default program used to open the file (also called the file association or handler) is checked. File association selections are stored in the Windows Registry and can be edited by users, administrators, or programs that have Registry access or by administrators usin
Near-miss passage: Playbook for T1546.008 Accessibility Features. Different response path focused on privilege escalation, persistence.
Query: rule covering Detects the addition of a new Federated Domain.
Matching passage: Sigma rule: Detects the addition of a new Federated Domain.. Logsource: m365 / exchange. Rule: title: New Federated Domain Added - Exchange id: 42127bdd-9133-474f-a6f1-97b6c08a4339 related: - id: 58f88172-a73d-442b-94c9-95eaed3cbb36 type: similar status: test description: Detects the addition of a new Federated Domain. references: - https://www.fireeye.com/content/dam/fireeye-www/blog/pdfs/wp-m-unc2452-2021-000343-01.pdf - https://us-cert.cisa.gov/ncas/alerts/aa21-008a - https://www.splunk.com/en_us/blog/security/a-golden-saml-journey-solarwinds-continued.html - https://www.sygnia.co/golden-saml-advisory - https://o365blog.com/post/aadbackdoor/ author: Splunk Threat Research Team (original rule), '@ionsor (rule)' date: 2022-02-08 tags: - attack.persistence - attack.t1136.003 logsource: service: exchange product: m365 detection: selection: eventSource: Exchange eventName: Add-FederatedDomain status: success condition: selection falsepositives: - The creation of a new Federated domain is not necessarily malicious, however these events need to be followed closely, as it may indicate federated credential abuse or backdoor via federated identities at a similar or different cloud provider. level: medium
Near-miss passage: Sigma rule: Detects addition of users to the local Remote Desktop Users group via "Net" or "Add-LocalGroupMember".. Logsource: windows / process_creation. Rule: title: User Added to Remote Desktop Users Group id: ffa28e60-bdb1-46e0-9f82-05f7a61cc06e related: - id: ad720b90-25ad-43ff-9b5e-5c841facc8e5 type: similar - id: 10fb649c-3600-4d37-b1e6-56ea90bb7e09 type: similar status: test description: Detects addition of users to the local Remote Desktop Users group via "Net" or "Add-LocalGroupMember". references: - https://www.microsoft.com/security/blog/2021/11/16/evolving-trends-in-iranian-threat-actor-activity-mstic-presentation-at-cyberwarcon-2021/ author: Florian Roth (Nextron Systems) date: 2021-12-06 modified: 2022-09-09 tags: - attack.initial-access - attack.persistence - attack.lateral-movement - attack.t1133 - attack.t1136.001 - attack.t1021.001 logsource: category: process_creation product: windows detection: selection_main: - CommandLine|contains|all: - 'localgroup ' - ' /add' - CommandLine|contains|all: - 'Add-LocalGroupMember ' - ' -Group ' selection_group: CommandLine|contains: - Remote Desktop Users - Utilisateurs du Bureau à distance - Usuarios de escritorio remoto condition: all of selection_* falsepositives: - Administrative activity level: high
Query: describe CVE-2015-4323
Matching passage: CVE-2015-4323. CWE: CWE-119. CVSS: 6.099999904632568. Buffer overflow in Cisco NX-OS on Nexus 1000V devices for VMware vSphere 7.3(0)ZN(0.9); Nexus 3000 devices 6.0(2)U5(1.41), 7.0(3)I2(0.373), and 7.3(0)ZN(0.83); Nexus 4000 devices 4.1(2)E1(1b); Nexus 7000 devices 6.2(14)S1; Nexus 9000 devices 7.3(0)ZN(0.9); and MDS 9000 devices 6.2 (13) and 7.1(0)ZN(91.99) and MDS SAN-OS 7.1(0)ZN(91.99) allows remote attackers to cause a denial of service (device outage) via a crafted ARP packet, related to incorrect MTU validation, aka Bug IDs CSCuv71933, CSCuv61341, CSCuv61321, CSCuu78074, CSCut37060, CSCuv61266, CSCuv61351, CSCuv61358, and CSCuv61366.
Near-miss passage: CVE-2015-6990. CWE: CWE-119. CVSS: 6.800000190734863. FontParser in Apple iOS before 9.1 and OS X before 10.11.1 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted font file, a different vulnerability than CVE-2015-6976, CVE-2015-6977, CVE-2015-6978, CVE-2015-6991, CVE-2015-6993, CVE-2015-7008, CVE-2015-7009, CVE-2015-7010, and CVE-2015-7018.
Query: alert when Detects changes to the "DisableHypervisorEnforcedPagingTranslation" registry value. Where the it is set to "1" in order
Matching passage: Sigma rule: Detects changes to the "DisableHypervisorEnforcedPagingTranslation" registry value. Where the it is set to "1" in order. Logsource: windows / registry_set. Rule: title: Hypervisor Enforced Paging Translation Disabled id: 7f2954d2-99c2-4d42-a065-ca36740f187b status: test description: 'Detects changes to the "DisableHypervisorEnforcedPagingTranslation" registry value. Where the it is set to "1" in order to disable the Hypervisor Enforced Paging Translation feature. ' references: - https://twitter.com/standa_t/status/1808868985678803222 - https://github.com/AaLl86/WindowsInternals/blob/070dc4f317726dfb6ffd2b7a7c121a33a8659b5e/Slides/Hypervisor-enforced%20Paging%20Translation%20-%20The%20end%20of%20non%20data-driven%20Kernel%20Exploits%20(Recon2024).pdf author: Nasreddine Bencherchali (Nextron Systems) date: 2024-07-05 tags: - attack.defense-impairment - attack.t1685 logsource: category: registry_set product: windows detection: selection: TargetObject|endswith: \DisableHypervisorEnforcedPagingTranslation Details: DWORD (0x00000001) condition: selection falsepositives: - Unknown level: high
Near-miss passage: Sigma rule: Identifies when a service account is modified or deleted.. Logsource: azure / activitylogs. Rule: title: Azure Kubernetes Service Account Modified or Deleted id: 12d027c3-b48c-4d9d-8bb6-a732200034b2 status: test description: Identifies when a service account is modified or deleted. references: - https://learn.microsoft.com/en-us/azure/role-based-access-control/resource-provider-operations#microsoftkubernetes - https://www.microsoft.com/security/blog/2021/03/23/secure-containerized-environments-with-updated-threat-matrix-for-kubernetes/ - https://www.microsoft.com/security/blog/2020/04/02/attack-matrix-kubernetes/ - https://medium.com/mitre-engenuity/att-ck-for-containers-now-available-4c2359654bf1 author: Austin Songer @austinsonger date: 2021-08-07 modified: 2022-08-23 tags: - attack.impact - attack.t1531 - attack.t1485 - attack.t1496 - attack.t1489 logsource: product: azure service: activitylogs detection: selection: operationName: - MICROSOFT.KUBERNETES/CONNECTEDCLUSTERS/SERVICEACCOUNTS/WRITE - MICROSOFT.KUBERNETES/CONNECTEDCLUSTERS/SERVICEACCOUNTS/DELETE - MICROSOFT.KUBERNETES/CONNECTEDCLUSTERS/SERVICEACCOUNTS/IMPERSONATE/ACTION condition: selection falsepositives: - Service account being modified or deleted may be performed by a system administrator. Verify whether the user identity, user agent, and/or hostname should be making changes in your environment. - Service account modified or deleted from unfamiliar users should be investigated. If known behavior is causing false positives, it can be exempted from the rule. level: medium
Query: exploit Multiple cross-site scripting (XSS) vulnerabilities in Issuetracker phpBugTracker before 1.7.2 allow remote attackers to inject arbitrary web script or HTML via unspecified paramet
Matching passage: CVE-2015-2148. CWE: CWE-79. CVSS: 4.800000190734863. Multiple cross-site scripting (XSS) vulnerabilities in Issuetracker phpBugTracker before 1.7.2 allow remote attackers to inject arbitrary web script or HTML via unspecified parameters.
Near-miss passage: CVE-2015-10107. CWE: CWE-79. CVSS: 6.099999904632568. A vulnerability was found in Simplr Registration Form Plus+ Plugin up to 2.3.4 on WordPress and classified as problematic. This issue affects some unknown processing. The manipulation leads to cross site scripting. The attack may be initiated remotely. Upgrading to version 2.3.5 is able to address this issue. The identifier of the patch is d588446844dd49232ab400ef213ff5b92121c33e. It is recommended to upgrade the affected component. The identifier VDB-230153 was assigned to this vulnerability.
Query: how to detect Disable or Modify Cloud Log
Matching passage: T1685.002 Disable or Modify Cloud Log. Tactics: defense impairment. Description: An adversary may disable or modify cloud logging capabilities and integrations to limit what data is collected on their activities and avoid detection. Cloud environments allow for collection and analysis of audit and application logs that provide insight into what activities a user does within the environment. If an adversary has sufficient permissions, they can disable or modify logging to avoid detection of their activities. For example, in AWS an adversary may disable CloudWatch/CloudTrail integrations prior to conducting further malicious activity. They may alternatively tamper with logging functionality, for example, by removing any associated SNS topics, disabling multi-region logging, or disabling settings that validate and/or encrypt log files.(Citation: AWS Cloud Trail)(Citation: Pacu Detection Disruption Module) In Office 365, an adversary may disable logging on mail collection activities for specific users by using the Set-MailboxAuditBypassAssociation cmdlet, by disabling M365 Advanced Auditing for the user, or by downgrading the user’s license from an Enterprise E5 to an Enterprise E3 license.(Citation: Dark Reading)
Near-miss passage: T1685.006 Clear Linux or Mac System Logs. Tactics: defense impairment. Description: Adversaries may clear system logs to hide evidence of an intrusion. macOS and Linux both keep track of system or user-initiated actions via system logs. The majority of native system logging is stored under the `/var/log/` directory. Subfolders in this directory categorize logs by their related functions, such as:(Citation: Linux Logs) * `/var/log/messages:`: General and system-related messages * `/var/log/secure or /var/log/auth.log`: Authentication logs * `/var/log/utmp or /var/log/wtmp`: Login records * `/var/log/kern.log`: Kernel logs * `/var/log/cron.log`: Crond logs * `/var/log/maillog`: Mail server logs * `/var/log/httpd/`: Web server access and error logs
Query: describe CVE-2015-0734
Matching passage: CVE-2015-0734. CWE: CWE-79. CVSS: 4.300000190734863. Multiple cross-site scripting (XSS) vulnerabilities on the Cisco Email Security Appliance (ESA) 8.5.6-106 allow remote attackers to inject arbitrary web script or HTML via unspecified parameters in a (1) GET or (2) POST request, aka Bug ID CSCut87743.
Near-miss passage: CVE-2015-9384. CWE: CWE-79. CVSS: 6.099999904632568. The relevant plugin before 1.0.8 for WordPress has XSS.
Query: CVE similar to CVE-2015-8221
Matching passage: CVE-2015-8221. CWE: CWE-119. CVSS: 10.0. Integer overflow in Google Picasa before 3.9.140 Build 259 allows remote attackers to execute arbitrary code via the CAMF section in a FOVb image, which triggers a heap-based buffer overflow.
Near-miss passage: CVE-2015-4049. CWE: CWE-119. CVSS: 6.800000190734863. Unisys Libra 43xx, 63xx, and 83xx, and FS600 class systems with MCP-FIRMWARE 40.0 before 40.0IC4 Build 270 might allow remote authenticated users to cause a denial of service (data corruption or system crash) via vectors related to using program operators during EPSILON (level 5) based codefiles at peak memory usage, which triggers CPM stack corruption.
Query: exploit Directory traversal vulnerability in Bonita BPM Portal before 6.5.3 allows remote attackers to read arbitrary files via a .. (dot dot) in the theme parameter and a file path in the
Matching passage: CVE-2015-3897. CWE: CWE-22. CVSS: 5.0. Directory traversal vulnerability in Bonita BPM Portal before 6.5.3 allows remote attackers to read arbitrary files via a .. (dot dot) in the theme parameter and a file path in the location parameter to bonita/portal/themeResource.
Near-miss passage: CVE-2015-4546. CWE: CWE-22. CVSS: 7.800000190734863. Directory traversal vulnerability in EMC RSA OneStep 6.9 before build 559, as used in RSA Certificate Manager and RSA Registration Manager through 6.9 build 558 and other products, allows remote attackers to read arbitrary files via a crafted KCSOSC_ERROR_PAGE parameter.
Query: describe CVE-2015-2525
Matching passage: CVE-2015-2525. CWE: CWE-264. CVSS: 7.199999809265137. Task Scheduler in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT Gold and 8.1, and Windows 10 allows local users to bypass intended filesystem restrictions and delete arbitrary files via unspecified vectors, aka "Windows Task File Deletion Elevation of Privilege Vulnerability."
Near-miss passage: CVE-2015-6755. CWE: CWE-264. CVSS: 7.5. The ContainerNode::parserInsertBefore function in core/dom/ContainerNode.cpp in Blink, as used in Google Chrome before 46.0.2490.71, proceeds with a DOM tree insertion in certain cases where a parent node no longer contains a child node, which allows remote attackers to bypass the Same Origin Policy via crafted JavaScript code.
Query: exploit The Off Main Thread Compositing (OMTC) implementation in Mozilla Firefox before 37.0 makes an incorrect memset call during interaction with the mozilla::layers::BufferTextureClient
Matching passage: CVE-2015-0805. CWE: CWE-17. CVSS: 7.5. The Off Main Thread Compositing (OMTC) implementation in Mozilla Firefox before 37.0 makes an incorrect memset call during interaction with the mozilla::layers::BufferTextureClient::AllocateForSurface function, which allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via vectors that trigger rendering of 2D graphics content.
Near-miss passage: CVE-2015-1728. CWE: CWE-17. CVSS: 9.300000190734863. Microsoft Windows Media Player 10 through 12 allows remote attackers to execute arbitrary code via a crafted DataObject on a web site, aka "Windows Media Player RCE via DataObject Vulnerability."
Query: alert when Detects the rare use of the command line tool shutdown to logoff a user
Matching passage: Sigma rule: Detects the rare use of the command line tool shutdown to logoff a user. Logsource: windows / process_creation. Rule: title: Suspicious Execution of Shutdown to Log Out id: ec290c06-9b6b-4338-8b6b-095c0f284f10 status: test description: Detects the rare use of the command line tool shutdown to logoff a user references: - https://github.com/redcanaryco/atomic-red-team/blob/9e5b12c4912c07562aec7500447b11fa3e17e254/atomics/T1529/T1529.md - https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/shutdown author: frack113 date: 2022-10-01 tags: - attack.impact - attack.t1529 logsource: category: process_creation product: windows detection: selection: Image|endswith: \shutdown.exe CommandLine|contains: /l condition: selection falsepositives: - Unknown level: medium
Near-miss passage: Sigma rule: Detects an executable in the users directory started from one of the Microsoft Office suite applications (Word, Excel, P. Logsource: windows / process_creation. Rule: title: Suspicious Binary In User Directory Spawned From Office Application id: aa3a6f94-890e-4e22-b634-ffdfd54792cc status: test description: Detects an executable in the users directory started from one of the Microsoft Office suite applications (Word, Excel, PowerPoint, Publisher, Visio) references: - https://blog.morphisec.com/fin7-not-finished-morphisec-spots-new-campaign - https://www.virustotal.com/gui/file/23160972c6ae07f740800fa28e421a81d7c0ca5d5cab95bc082b4a986fbac57 author: Jason Lynch date: 2019-04-02 modified: 2023-02-04 tags: - attack.execution - attack.t1204.002 - attack.g0046 - car.2013-05-002 logsource: category: process_creation product: windows detection: selection: ParentImage|endswith: - \WINWORD.EXE - \EXCEL.EXE - \POWERPNT.exe - \MSPUB.exe - \VISIO.exe - \MSACCESS.exe - \EQNEDT32.exe Image|startswith: C:\users\ Image|endswith: .exe filter: Image|endswith: \Teams.exe condition: selection and not filter falsepositives: - Unknown level: high
Query: exploit Cross-site scripting (XSS) vulnerability in the Term Merge module before 7.x-1.2 for Drupal allows remote authenticated users to inject arbitrary web script or HTML via unspecified
Matching passage: CVE-2015-3360. CWE: CWE-79. CVSS: 3.5. Cross-site scripting (XSS) vulnerability in the Term Merge module before 7.x-1.2 for Drupal allows remote authenticated users to inject arbitrary web script or HTML via unspecified vectors.
Near-miss passage: CVE-2015-6959. CWE: CWE-79. CVSS: 5.400000095367432. Cross-site scripting (XSS) vulnerability in Vindula 1.9.
Query: exploit Use-after-free vulnerability in Adobe Flash Player before 18.0.0.268 and 19.x and 20.x before 20.0.0.228 on Windows and OS X and before 11.2.202.554 on Linux, Adobe AIR before 20.0
Matching passage: CVE-2015-8065. CWE: UNKNOWN. CVSS: 10.0. Use-after-free vulnerability in Adobe Flash Player before 18.0.0.268 and 19.x and 20.x before 20.0.0.228 on Windows and OS X and before 11.2.202.554 on Linux, Adobe AIR before 20.0.0.204, Adobe AIR SDK before 20.0.0.204, and Adobe AIR SDK & Compiler before 20.0.0.204 allows attackers to execute arbitrary code via unspecified vectors, a different vulnerability than CVE-2015-8048, CVE-2015-8049, CVE-2015-8050, CVE-2015-8055, CVE-2015-8056, CVE-2015-8057, CVE-2015-8058, CVE-2015-8059, CVE-2015-8061, CVE-2015-8062, CVE-2015-8063, CVE-2015-8064, CVE-2015-8066, CVE-2015-8067, CVE-2015-8068, CVE-2015-8069, CVE-2015-8070, CVE-2015-8071, CVE-2015-8401, CVE-2015-8402, CVE-2015-8403, CVE-2015-8404, CVE-2015-8405, CVE-2015-8406, CVE-2015-8410, CVE-2015-8411, CVE-2015-8412, CVE-2015-8413, CVE-2015-8414, CVE-2015-8420, CVE-2015-8421, CVE-2015-8422, CVE-2015-8423, CVE-2015-8424, CVE-2015-8425, CVE-2015-8426, CVE-2015-8427, CVE-2015-8428, CVE-2015-8429, CVE-2015-8430, CVE-2015-8431, CVE-2015-8432, CVE-2015-8433, CVE-2015-8434, CVE-2015-8435, CVE-2015-8436, CVE-2015-8437, CVE-2015-8441, CVE-2015-8442, CVE-2015-8447, CVE-2015-8448, CVE-2015-8449, CVE-2015-8450, CVE-2015-8452, and CVE-2015-8454.
Near-miss passage: CVE-2015-0923. CWE: UNKNOWN. CVSS: 5.0. The ContentBlockEx method in Workarea/ServerControlWS.asmx in Ektron Content Management System (CMS) 8.5 and 8.7 before 8.7sp2 and 9.0 before sp1 allows remote attackers to read arbitrary files via an external entity declaration in conjunction with an entity reference within an XML document named in the xslt parameter, related to an XML External Entity (XXE) issue.
Query: detect Use of hostname to get information in logs
Matching passage: Sigma rule: Use of hostname to get information. Logsource: windows / process_creation. Rule: title: Suspicious Execution of Hostname id: 7be5fb68-f9ef-476d-8b51-0256ebece19e status: test description: Use of hostname to get information references: - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1082/T1082.md#atomic-test-6---hostname-discovery-windows - https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/hostname author: frack113 date: 2022-01-01 tags: - attack.discovery - attack.t1082 logsource: category: process_creation product: windows detection: selection: Image|endswith: \HOSTNAME.EXE condition: selection falsepositives: - Unknown level: low
Near-miss passage: Sigma rule: Detects a potentially suspicious execution from an uncommon folder.. Logsource: windows / process_creation. Rule: title: Process Execution From A Potentially Suspicious Folder id: 3dfd06d2-eaf4-4532-9555-68aca59f57c4 status: test description: Detects a potentially suspicious execution from an uncommon folder. references: - https://github.com/mbevilacqua/appcompatprocessor/blob/6c847937c5a836e2ce2fe2b915f213c345a3c389/AppCompatSearch.txt - https://www.secureworks.com/research/bronze-butler-targets-japanese-businesses - https://www.crowdstrike.com/resources/reports/2019-crowdstrike-global-threat-report/ - https://github.com/ThreatHuntingProject/ThreatHunting/blob/cb22598bb70651f88e0285abc8d835757d2cb596/hunts/suspicious_process_creation_via_windows_event_logs.md author: Florian Roth (Nextron Systems), Tim Shelton date: 2019-01-16 modified: 2024-07-12 tags: - attack.stealth - attack.t1036 logsource: category: process_creation product: windows detection: selection: Image|contains: - :\Perflogs\ - :\Users\All Users\ - :\Users\Default\ - :\Users\NetworkService\ - :\Windows\addins\ - :\Windows\debug\ - :\Windows\Fonts\ - :\Windows\Help\ - :\Windows\IME\ - :\Windows\Media\ - :\Windows\repair\ - :\Windows\security\ - :\Windows\System32\Tasks\ - :\Windows\Tasks\ - $Recycle.bin - \config\systemprofile\ - \Intel\Logs\ - \RSA\MachineKeys\ filter_optional_ibm: Image|startswith: C:\Users\Public\IBM\ClientSolutions\Start_Programs\ filter_optional_citrix: Image|startswith: C:\Windows\SysWOW64\config\systemprofile\Citrix\UpdaterBinaries\ Image|endswith: \CitrixReceiverUpdater.exe condition: selection and not 1 of filter_optional_* falsepositives: - Unknown level: high
Query: vulnerability: Microsoft Internet Explorer 11 and Microsoft Edge allow remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site, aka "Mic
Matching passage: CVE-2015-6142. CWE: CWE-119. CVSS: 9.300000190734863. Microsoft Internet Explorer 11 and Microsoft Edge allow remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site, aka "Microsoft Browser Memory Corruption Vulnerability," a different vulnerability than CVE-2015-6140, CVE-2015-6143, CVE-2015-6153, CVE-2015-6158, CVE-2015-6159, and CVE-2015-6160.
Near-miss passage: CVE-2015-0826. CWE: CWE-119. CVSS: 6.800000190734863. The nsTransformedTextRun::SetCapitalization function in Mozilla Firefox before 36.0 allows remote attackers to execute arbitrary code or cause a denial of service (out-of-bounds read of heap memory) via a crafted Cascading Style Sheets (CSS) token sequence that triggers a restyle or reflow operation.