#amd

On January 3rd, 2018, Microsoft released an advisory and security updates related to a newly discovered class of hardware vulnerabilities involving speculative execution side channels (known as Spectre and Meltdown) that affect AMD, ARM, and Intel CPUs to varying degrees. If you haven’t had a chance to learn about these issues, we recommend watching The Case of Spectre and Meltdown by the team at TU Graz from BlueHat Israel, reading the blog post by Jann Horn (@tehjh) of Google Project Zero, or reading the FOSDEM 2018 presentation by Jon Masters of Red Hat.

The __oom_reap_task_mm function in mm/oom_kill.c in the Linux kernel before 4.14.4 mishandles gather operations, which allows attackers to cause a denial of service (TLB entry leak or use-after-free) or possibly have unspecified other impact by triggering a copy_to_user call within a certain time window.

drivers/input/serio/i8042.c in the Linux kernel before 4.12.4 allows attackers to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact because the port->exists value can change after it is validated.

crypto/pcrypt.c in the Linux kernel before 4.14.13 mishandles freeing instances, allowing a local user able to access the AF_ALG-based AEAD interface (CONFIG_CRYPTO_USER_API_AEAD) and pcrypt (CONFIG_CRYPTO_PCRYPT) to cause a denial of service (kfree of an incorrect pointer) or possibly have unspecified other impact by executing a crafted sequence of system calls.

The tcpmss_mangle_packet function in net/netfilter/xt_TCPMSS.c in the Linux kernel before 4.11, and 4.9.x before 4.9.36, allows remote attackers to cause a denial of service (use-after-free and memory corruption) or possibly have unspecified other impact by leveraging the presence of xt_TCPMSS in an iptables action.

A memory corruption vulnerability exists in the .PSD parsing functionality of ACDSee Ultimate 10.0.0.292. A specially crafted .PSD file can cause an out of bounds write vulnerability resulting in potential code execution. An attacker can send a specific .PSD file to trigger this vulnerability.

An memory corruption vulnerability exists in the .GIF parsing functionality of Computerinsel Photoline 20.02. A specially crafted .GIF file can cause a vulnerability resulting in potential code execution. An attacker can send specific .GIF file to trigger this vulnerability.

An out-of-bounds write vulnerability exists in the PDF parsing functionality of Infix 7.1.5. A specially crafted PDF file can cause a vulnerability resulting in potential memory corruption. An attacker can send the victim a specific PDF file to trigger this vulnerability.

libffi requests an executable stack allowing attackers to more easily trigger arbitrary code execution by overwriting the stack. Please note that libffi is used by a number of other libraries. It was previously stated that this affects libffi version 3.2.1 but this appears to be incorrect. libffi prior to version 3.1 on 32 bit x86 systems was vulnerable, and upstream is believed to have fixed this issue in version 3.1.

A use-after-free vulnerability exists in the .ISO parsing functionality of PowerISO 6.8. A specially crafted .ISO file can cause a vulnerability resulting in potential code execution. An attacker can send a specific .ISO file to trigger this vulnerability.