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CVE archive

December 2019

Browse CVE records published in December 2019, with severity, affected products, CWE, KEV, and source-backed vulnerability context.

Showing 50 of 1489 matching CVEs · Page 10 of 30.

Unknown · CVSS Not scored

CVE-2019-19578: An issue was discovered in Xen through 4.12.x allowing x86 PV guest OS users to cause a denial of service v...

An issue was discovered in Xen through 4.12.x allowing x86 PV guest OS users to cause a denial of service via degenerate chains of linear pagetables, because of an incorrect fix for CVE-2017-15595. "Linear pagetables" is a technique which involves either pointing a pagetable at itself, or to another pagetable of the same or higher level. Xen has limited support for linear pagetables: A page may either point to itself, or point to another pagetable of the same level (i.e., L2 to L2, L3 to L3, and so on). XSA-240 introduced an additional restriction that limited the "depth" of such chains by allowing pages to either *point to* other pages of the same level, or *be pointed to* by other pages of the same level, but not both. To implement this, we keep track of the number of outstanding times a page points to or is pointed to another page table, to prevent both from happening at the same time. Unfortunately, the original commit introducing this reset this count when resuming validation of a partially-validated pagetable, incorrectly dropping some "linear_pt_entry" counts. If an attacker could engineer such a situation to occur, they might be able to make loops or other arbitrary chains of linear pagetables, as described in XSA-240. A malicious or buggy PV guest may cause the hypervisor to crash, resulting in Denial of Service (DoS) affecting the entire host. Privilege escalation and information leaks cannot be excluded. All versions of Xen are vulnerable. Only x86 systems are affected. Arm systems are not affected. Only x86 PV guests can leverage the vulnerability. x86 HVM and PVH guests cannot leverage the vulnerability. Only systems which have enabled linear pagetables are vulnerable. Systems which have disabled linear pagetables, either by selecting CONFIG_PV_LINEAR_PT=n when building the hypervisor, or adding pv-linear-pt=false on the command-line, are not vulnerable.

Published Dec 11, 2019 · Updated Aug 5, 2024

Critical · CVSS 9.8

CVE-2019-19589: The Lever PDF Embedder plugin 4.4 for WordPress does not block the distribution of polyglot PDF documents t...

The Lever PDF Embedder plugin 4.4 for WordPress does not block the distribution of polyglot PDF documents that are valid JAR archives. Note: It has been argued that "The vulnerability reported in PDF Embedder Plugin is not valid as the plugin itself doesn't control or manage the file upload process. It only serves the uploaded PDF files and the responsibility of uploading PDF file remains with the Site owner of Wordpress installation, the upload of PDF file is managed by Wordpress core and not by PDF Embedder Plugin. Control & block of polyglot file is required to be taken care at the time of upload, not on showing the file. Moreover, the reference mentions retrieving the files from the browser cache and manually renaming it to jar for executing the file. That refers to a two step non-connected steps which has nothing to do with PDF Embedder.

Published Dec 5, 2019 · Updated Aug 5, 2024

Unknown · CVSS Not scored

CVE-2019-19583: An issue was discovered in Xen through 4.12.x allowing x86 HVM/PVH guest OS users to cause a denial of serv...

An issue was discovered in Xen through 4.12.x allowing x86 HVM/PVH guest OS users to cause a denial of service (guest OS crash) because VMX VMEntry checks mishandle a certain case. Please see XSA-260 for background on the MovSS shadow. Please see XSA-156 for background on the need for #DB interception. The VMX VMEntry checks do not like the exact combination of state which occurs when #DB in intercepted, Single Stepping is active, and blocked by STI/MovSS is active, despite this being a legitimate state to be in. The resulting VMEntry failure is fatal to the guest. HVM/PVH guest userspace code may be able to crash the guest, resulting in a guest Denial of Service. All versions of Xen are affected. Only systems supporting VMX hardware virtual extensions (Intel, Cyrix, or Zhaoxin CPUs) are affected. Arm and AMD systems are unaffected. Only HVM/PVH guests are affected. PV guests cannot leverage the vulnerability.

Published Dec 11, 2019 · Updated Aug 5, 2024

Unknown · CVSS Not scored

CVE-2019-19580: An issue was discovered in Xen through 4.12.x allowing x86 PV guest OS users to gain host OS privileges by...

An issue was discovered in Xen through 4.12.x allowing x86 PV guest OS users to gain host OS privileges by leveraging race conditions in pagetable promotion and demotion operations, because of an incomplete fix for CVE-2019-18421. XSA-299 addressed several critical issues in restartable PV type change operations. Despite extensive testing and auditing, some corner cases were missed. A malicious PV guest administrator may be able to escalate their privilege to that of the host. All security-supported versions of Xen are vulnerable. Only x86 systems are affected. Arm systems are not affected. Only x86 PV guests can leverage the vulnerability. x86 HVM and PVH guests cannot leverage the vulnerability. Note that these attacks require very precise timing, which may be difficult to exploit in practice.

Published Dec 11, 2019 · Updated Aug 5, 2024

Unknown · CVSS Not scored

CVE-2019-19590: In radare2 through 4.0, there is an integer overflow for the variable new_token_size in the function r_asm_...

In radare2 through 4.0, there is an integer overflow for the variable new_token_size in the function r_asm_massemble at libr/asm/asm.c. This integer overflow will result in a Use-After-Free for the buffer tokens, which can be filled with arbitrary malicious data after the free. This allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via crafted input.

Published Dec 5, 2019 · Updated Aug 5, 2024

Unknown · CVSS Not scored

CVE-2019-19552: In userman 13.0.76.43 through 15.0.20 in Sangoma FreePBX, XSS exists in the user management screen of the A...

In userman 13.0.76.43 through 15.0.20 in Sangoma FreePBX, XSS exists in the user management screen of the Administrator web site, i.e., the/admin/config.php?display=userman URI. An attacker with sufficient privileges can edit the Display Name of a user and embed malicious XSS code. When another user (such as an admin) visits the main User Management screen, the XSS payload will render and execute in the context of the victim user's account.

Published Dec 6, 2019 · Updated Aug 5, 2024

Unknown · CVSS Not scored

CVE-2019-19507: In jpv (aka Json Pattern Validator) before 2.1.1, compareCommon() can be bypassed because certain internal...

In jpv (aka Json Pattern Validator) before 2.1.1, compareCommon() can be bypassed because certain internal attributes can be overwritten via a conflicting name, as demonstrated by 'constructor': {'name':'Array'}. This affects validate(). Hence, a crafted payload can overwrite this builtin attribute to manipulate the type detection result.

Published Dec 2, 2019 · Updated Aug 5, 2024

Unknown · CVSS Not scored

CVE-2019-19551: In userman 13.0.76.43 through 15.0.20 in Sangoma FreePBX, XSS exists in the User Management screen of the A...

In userman 13.0.76.43 through 15.0.20 in Sangoma FreePBX, XSS exists in the User Management screen of the Administrator web site. An attacker with access to the User Control Panel application can submit malicious values in some of the time/date formatting and time-zone fields. These fields are not being properly sanitized. If this is done and a user (such as an admin) visits the User Management screen and views that user's profile, the XSS payload will render and execute in the context of the victim user's account.

Published Dec 6, 2019 · Updated Aug 5, 2024

Unknown · CVSS Not scored

CVE-2019-19373: An issue was discovered in Squiz Matrix CMS 5.5.0 prior to 5.5.0.3, 5.5.1 prior to 5.5.1.8, 5.5.2 prior to...

An issue was discovered in Squiz Matrix CMS 5.5.0 prior to 5.5.0.3, 5.5.1 prior to 5.5.1.8, 5.5.2 prior to 5.5.2.4, and 5.5.3 prior to 5.5.3.3 where a user can trigger arbitrary unserialization of a PHP object from a packages/cms/page_templates/page_remote_content/page_remote_content.inc POST parameter during processing of a Remote Content page type. This unserialization can be used to trigger the inclusion of arbitrary files on the filesystem (local file inclusion), and results in remote code execution.

Published Dec 11, 2019 · Updated Aug 5, 2024

Unknown · CVSS Not scored

CVE-2019-19460: An issue was discovered in SALTO ProAccess SPACE 5.4.3.0.

An issue was discovered in SALTO ProAccess SPACE 5.4.3.0. The product's webserver runs as a Windows service with local SYSTEM permissions by default. This is against the principle of least privilege. An attacker who is able to exploit CVE-2019-19458 or CVE-2019-19459 is basically able to write to every single path on the file system, because the webserver is running with the highest privileges available.

Published Dec 3, 2019 · Updated Aug 5, 2024

Unknown · CVSS Not scored

CVE-2019-19459: An issue was discovered in SALTO ProAccess SPACE 5.4.3.0.

An issue was discovered in SALTO ProAccess SPACE 5.4.3.0. An attacker can write arbitrary content to arbitrary files, as demonstrated by CVE-2019-19458 files under the web root, or .bat files that will be used with auto start. This allows an attacker to execute arbitrary commands on the server.

Published Dec 3, 2019 · Updated Aug 5, 2024