Xen Local Security Bypass Vulnerability (CNVD-2018-15165)

Xen is an open source virtual machine monitor, developed by the University of Cambridge. It is intended to run up to 102 full-featured operating systems on a single computer. A local security bypass vulnerability exists in Xen versions 4.7 through 4.10.x, which stems from a program's failure to...

CVE-2018-12892

An issue was discovered in Xen 4.7 through 4.10.x. libxl fails to pass the readonly flag to qemu when setting up a SCSI disk, due to what was probably an erroneous merge conflict resolution. Malicious guest administrators or in some situations users may be able to write to supposedly read-only di...

[SECURITY] [DSA 4236-1] xen security update

------------------------------------------------------------------------- Debian Security Advisory DSA-4236-1 [email protected] https://www.debian.org/security/ Moritz Muehlenhoff June 27, 2018 https://www.debian.org/security/faq -...

libxl fails to honour readonly flag on HVM emulated SCSI disks

ISSUE DESCRIPTION libxl fails to pass the readonly flag to qemu when setting up a SCSI disk, due to what was probably an erroneous merge conflict resolution. IMPACT Malicious guest administrators or in some situations users may be able to write to supposedly read-only disk images. VULNERABLE...

CVE-2016-10585

libxl provides Node bindings for the libxl library for reading and writing excel XLS and XLSX spreadsheets. libxl downloads zipped resources over HTTP, which leaves it vulnerable to MITM attacks. It may be possible to cause remote code execution RCE by swapping out the requested zip file with an...

CVE-2016-10585

libxl provides Node bindings for the libxl library for reading and writing excel XLS and XLSX spreadsheets. libxl downloads zipped resources over HTTP, which leaves it vulnerable to MITM attacks. It may be possible to cause remote code execution RCE by swapping out the requested zip file with an...

Remote code execution

libxl provides Node bindings for the libxl library for reading and writing excel XLS and XLSX spreadsheets. libxl downloads zipped resources over HTTP, which leaves it vulnerable to MITM attacks. It may be possible to cause remote code execution RCE by swapping out the requested zip file with an...

CVE-2016-10585

CVE-2016-10585 affects libxl bindings for Node.js. The library downloads zipped resources over HTTP, enabling MITM attacks that could allow an attacker in a privileged network position to swap the downloaded zip with a malicious one, potentially causing remote code execution on the host running l...

CVE-2016-10585

libxl provides Node bindings for the libxl library for reading and writing excel XLS and XLSX spreadsheets. libxl downloads zipped resources over HTTP, which leaves it vulnerable to MITM attacks. It may be possible to cause remote code execution RCE by swapping out the requested zip file with an...

Multiple Vulnerabilities in LibXL Library Open Door to RCE Attacks

Researchers have identified seven vulnerabilities in the LibXL C library, used to read Excel files. Each of the vulnerabilities are rated 8.8 in severity on the Common Vulnerability Scoring System scale. Attackers could exploit each of the vulnerabilities and perform remote code execution attacks...

Man In The Middle (MitM)

libxl is vulnerable to man-in-the-middle MitM attacks. This is because the library downloads zipped resources via HTTP, allowing MitM attacks. It may also cause remote code execution RCE by swapping out the zip file with an attacker controlled zip file if the attacker is on the network or...

Downloads Resources over HTTP

Overview Affected versions of libxl insecurely download an executable over an unencrypted HTTP connection. In scenarios where an attacker has a privileged network position, it is possible to intercept the response and replace the executable with a malicious one, resulting in code execution on the...

delimiter injection vulnerabilities in pygrub

ISSUE DESCRIPTION pygrub, the boot loader emulator, fails to quote or sanity check its results when reporting them to its caller. pygrub supports a number of output formats. When the S-expression output format is requested, putting string quotes and S-expressions in the bootloader configuration...

DSA-3633-1 xen - security update

Bulletin has no description...

Fedora 24 : xen (2016-389be30b95)

fix for CVE-2016-2858 doesn't build with qemu-xen enabled Unsanitised guest input in libxl device handling code XSA-175, CVE-2016-4962 1342132 Unsanitised driver domain input in libxl device handling XSA-178, CVE-2016-4963 1342131 arm: Host crash caused by VMID exhaust XSA-181 1342530 Qemu:...

The vulnerability of Xen hypervisors allows a hacker to write data to a disk that is only intended for reading.

The vulnerability of the libxl library in Xen hypervisors arises from the lack of restrictions on writing data when using the qemu-xen device. Exploiting this vulnerability allows a malicious actor to write data to a disk that is intended only for reading...

FreeBSD : xen-tools -- Unsanitised guest input in libxl device handling code (e2fca11b-4212-11e6-942d-bc5ff45d0f28)

The Xen Project reports : Various parts of libxl device-handling code inappropriately use information from partially guest controlled areas of xenstore. A malicious guest administrator can cause denial of service by resource exhaustion. A malicious guest administrator can confuse and/or deny...

FreeBSD : xen-tools -- Unsanitised driver domain input in libxl device handling (e589ae90-4212-11e6-942d-bc5ff45d0f28)

The Xen Project reports : libxl's device-handling code freely uses and trusts information from the backend directories in xenstore. A malicious driver domain can deny service to management tools. %NASLMINLEVEL 70300 C Tenable Network Security, Inc. The descriptive text and package checks in this...

Xen Denial of Service Vulnerability (CNVD-2016-03898)

Xen is an open source virtual machine monitor product developed at the University of Cambridge, UK. The product enables different and incompatible operating systems to run on the same computer and supports runtime migration to ensure uptime and avoid downtime. A security vulnerability exists in...

DEBIAN-CVE-2016-4963

The libxl device-handling in Xen through 4.6.x allows local guest OS users with access to the driver domain to cause a denial of service management tool confusion by manipulating information in the backend directories in xenstore...