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. There are issues with restartable PV type change operations. To avoid using shadow pagetables for PV guests, Xen exposes the actual hardware pagetables to the guest. In order to prevent the guest from modifying these page tables directly, Xen keeps track of how pages are used using a type system; pages must be "promoted" before being used as a pagetable, and "demoted" before being used for any other type. Xen also allows for "recursive" promotions: i.e., an operating system promoting a page to an L4 pagetable may end up causing pages to be promoted to L3s, which may in turn cause pages to be promoted to L2s, and so on. These operations may take an arbitrarily large amount of time, and so must be re-startable. Unfortunately, making recursive pagetable promotion and demotion operations restartable is incredibly complicated, and the code contains several races which, if triggered, can cause Xen to drop or retain extra type counts, potentially allowing guests to get write access to in-use pagetables. A malicious PV guest administrator may be able to escalate their privilege to that of the host. All x86 systems with untrusted PV guests are vulnerable. HVM and PVH guests cannot exercise this vulnerability.
Last updated 24 July 2024
HuffmanTreemakeFromFrequencies in lodepng.c in LodePNG through 2019-09-28, as used in WinPR in FreeRDP and other products, has a memory leak because a supplied realloc pointer (i.e., the first argument to realloc) is also used for a realloc return value.
Last updated 24 July 2024
Last updated 24 July 2024
Last updated 24 July 2024
Last updated 24 July 2024
Last updated 24 July 2024
Last updated 24 July 2024
Last updated 24 July 2024
Last updated 24 July 2024
Last updated 24 July 2024
Last updated 24 July 2024
Last updated 24 July 2024
Last updated 24 July 2024
PuTTY before 0.73 mishandles the "bracketed paste mode" protection mechanism, which may allow a session to be affected by malicious clipboard content.
PuTTY before 0.73 might allow remote SSH-1 servers to cause a denial of service by accessing freed memory locations via an SSH1MSGDISCONNECT message.
In the Linux kernel before 5.0.3, a memory leak exits in hsrdevfinalize() in net/hsr/hsrdevice.c if hsraddport fails to add a port, which may cause denial of service, aka CID-6caabe7f197d.
A flaw was found in the Linux kernel's implementation of the HCI UART driver. A local attacker with access permissions to the Bluetooth device can issue an ioctl, which triggers the hciuartsetproto() function in drivers/bluetooth/hcildisc.c. The flaw in this function can cause memory corruption or a denial of service because of a use-after-free issue when the hciuartregisterdev() fails.
A flaw was found in the allocatetracebuffer in kernel/trace/trace.c in the debug subsystem, when failure to allocate a dynamic percpu area, a resource cleanup is called. The pointer (buf->buffer) still holds the address and is not set to NULL, which can cause a use-after-free problem, leading to a dangling pointer issue.
A flaw was found in, ghostscript versions prior to 9.50, in the .pdfexectoken and other procedures where it did not properly secure its privileged calls, enabling scripts to bypass -dSAFER restrictions. A specially crafted PostScript file could disable security protection and then have access to the file system, or execute arbitrary commands.
A flaw was found in, ghostscript versions prior to 9.50, in the .pdfhookDSCCreator procedure where it did not properly secure its privileged calls, enabling scripts to bypass -dSAFER restrictions. A specially crafted PostScript file could disable security protection and then have access to the file system, or execute arbitrary commands.
Last updated 24 July 2024
The POWER9 backend in GNU Compiler Collection (GCC) before version 10 could optimize multiple calls of the builtindarn intrinsic into a single call, thus reducing the entropy of the random number generator. This occurred because a volatile operation was not specified. For example, within a single execution of a program, the output of every builtindarn() call may be the same.
Pallets Werkzeug before 0.15.3, when used with Docker, has insufficient debugger PIN randomness because Docker containers share the same machine id.
An issue was discovered in Schism Tracker through 20190722. There is a heap-based buffer overflow via a large number of song patterns in fmtmtmloadsong in fmt/mtm.c, a different vulnerability than CVE-2019-14465.
It was found that in icedtea-web up to and including 1.7.2 and 1.8.2 executable code could be injected in a JAR file without compromising the signature verification. An attacker could use this flaw to inject code in a trusted JAR. The code would be executed inside the sandbox.
It was found that icedtea-web up to and including 1.7.2 and 1.8.2 was vulnerable to a zip-slip attack during auto-extraction of a JAR file. An attacker could use this flaw to write files to arbitrary locations. This could also be used to replace the main running application and, possibly, break out of the sandbox.
An exploitable code execution vulnerability exists in the XPM image rendering function of SDL2image 2.0.4. A specially crafted XPM image can cause an integer overflow in the colorhash function, allocating too small of a buffer. This buffer can then be written out of bounds, resulting in a heap overflow, ultimately ending in code execution. An attacker can display a specially crafted image to trigger this vulnerability.
An exploitable code execution vulnerability exists in the XPM image rendering functionality of SDL2image 2.0.4. A specially crafted XPM image can cause an integer overflow, allocating too small of a buffer. This buffer can then be written out of bounds resulting in a heap overflow, ultimately ending in code execution. An attacker can display a specially crafted image to trigger this vulnerability.