CVE-2020-24385

In MidnightBSD before 1.2.6 and 1.3 before August 2020, and FreeBSD before 7, a NULL pointer dereference was found in the Linux emulation layer that allows attackers to crash the running kernel. During binary interaction, td-tdemuldata in sys/compat/linux/linuxemul.h is not getting initialized an...

Emulation of Malicious Shellcode With Speakeasy

In order to enable emulation of malware samples at scale, we have developed the Speakeasy emulation framework. Speakeasy aims to make it as easy as possible for users who are not malware analysts to acquire triage reports in an automated way, as well as enabling reverse engineers to write custom...

Breaking Samsung firmware, or turning your S8/S9/S10 into a DIY “Proxmark”

This post is a companion to the DEF CON 28 video available here Breaking the Firmware of Samsung’s NFC Chips Recently I have been looking into how to push the capabilities of my old smartphones beyond what you could traditionally do just by rooting it. Smartphones contain huge amounts of hardware...

An integer overflow was found in QEMU 4.0.1 through 4.2.0 in the way it implemented ATI VGA emulation. This flaw occurs in the ati_2d_blt() routine in hw/display/ati-2d.c while handling MMIO write operations through the ati_mm_write() callback. A malicious guest could abuse this flaw to crash the QEMU process resulting in a denial of service.

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PT-2020-5947

Name of the Vulnerable Software and Affected Versions: QEMU versions through 5.0.0 Description: A heap-based buffer overflow was found in the SDHCI device emulation support. It could occur while doing a multi block SDMA transfer via the sdhci sdma transfer multi blocks routine in hw/sd/sdhci.c. A...

UPDATE: FudgeC2 0.5.7

FudgeC2 0.5.7 was released in June and this post documents the changes made to it. As you may remember, this awesome adversary emulation system was listed in my older post titled - List of Open Source C2 Post-Exploitation Frameworks. The new version brings system SMTP support, operations security...

CVE-2020-17380

A flaw was found in QEMU. A heap-based buffer overflow vulnerability was found in the SDHCI device emulation support allowing a guest user or process to crash the QEMU process on the host resulting in a denial of service condition, or potentially execute arbitrary code with privileges of the QEMU...

openSUSE Security Update : qemu (openSUSE-2020-1108)

This update for qemu to version 4.2.1 fixes the following issues : - CVE-2020-10761: Fixed a denial of service in Network Block Device nbd support infrastructure bsc1172710. - CVE-2020-13800: Fixed a denial of service possibility in ati-vga emulation bsc1172495. - CVE-2020-13659: Fixed a NULL...

SUSE SLED15 / SLES15 Security Update : qemu (SUSE-SU-2020:2015-1)

This update for qemu to version 4.2.1 fixes the following issues : CVE-2020-10761: Fixed a denial of service in Network Block Device nbd support infrastructure bsc1172710. CVE-2020-13800: Fixed a denial of service possibility in ati-vga emulation bsc1172495. CVE-2020-13659: Fixed a NULL pointer...

SUSE-SU-2020:2015-1 Security update for qemu

This update for qemu to version 4.2.1 fixes the following issues: - CVE-2020-10761: Fixed a denial of service in Network Block Device nbd support infrastructure bsc1172710. - CVE-2020-13800: Fixed a denial of service possibility in ati-vga emulation bsc1172495. - CVE-2020-13659: Fixed a null...

The vulnerability in the `hw/rdma/vmw/pvrdma_cmd.c` component of the PVRDMA virtual network adapter driver allows a hacker to trigger a service failure.

The vulnerability in the hw/rdma/vmw/pvrdmacmd.c component of the PVRDMA virtual network adapter’s hardware emulation software, QEMU, is related to pointer assignment errors. Exploiting this vulnerability could allow a remote attacker to cause a service failure by creating CQ/QP objects...

QEMU: Slirp: potential OOB access due to unsafe snprintf() usages

An out-of-bounds heap buffer access flaw was found in the SLiRP networking implementation of the QEMU emulator. This flaw occurs in tcpemu routine while emulating IRC and other protocols due to unsafe usage of the snprintf3 function. A user or process could use this flaw to crash the QEMU process...

QEMU: Slirp: potential OOB access due to unsafe snprintf() usages

An out-of-bounds heap buffer access flaw was found in the SLiRP networking implementation of the QEMU emulator. This flaw occurs in tcpemu routine while emulating IRC and other protocols due to unsafe usage of the snprintf3 function. A user or process could use this flaw to crash the QEMU process...

QEMU: slirp: OOB buffer access while emulating tcp protocols in tcp_emu()

A heap buffer overflow issue was found in the SLiRP networking implementation of the QEMU emulator. This flaw occurs in the tcpemu routine while emulating IRC and other protocols. An attacker could use this flaw to crash the QEMU process on the host, resulting in a denial of service or potential...

SUSE SLES12 Security Update : qemu (SUSE-SU-2020:1514-1)

This update for qemu fixes the following issues : Security issues fixed : CVE-2020-1711: Fixed a potential OOB access in the iSCSI client code bsc1166240. CVE-2019-12068: Fixed a potential DoS in the LSI SCSI controller emulation bsc1146873. CVE-2020-1983: Fixed a use-after-free in the ipreass...

Debian DLA-2242-1 : linux-4.9 security update

Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks. CVE-2019-2182 Hanjun Guo and Lei Li reported a race condition in the arm64 virtual memory management code, which could lead to an information disclosur...

QEMU Buffer Overflow Vulnerability (CNVD-2020-35975)

QEMU Quick Emulator is a set of simulation processor software by French software developer Fabrice Bellard. The software is fast, cross-platform and other characteristics. A buffer overflow vulnerability exists in the hw/pci/pci.c file in QEMU version 4.2.0. The vulnerability stems from a network...

QEMU: slirp: OOB buffer access while emulating tcp protocols in tcp_emu()

A heap buffer overflow issue was found in the SLiRP networking implementation of the QEMU emulator. This flaw occurs in the tcpemu routine while emulating IRC and other protocols. An attacker could use this flaw to crash the QEMU process on the host, resulting in a denial of service or potential...

UBUNTU-CVE-2020-13361

In QEMU 5.0.0 and earlier, es1370transferaudio in hw/audio/es1370.c does not properly validate the frame count, which allows guest OS users to trigger an out-of-bounds access during an es1370write operation...

Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : QEMU vulnerabilities (USN-4372-1)

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-4372-1 advisory. It was discovered that QEMU incorrectly handled bochs-display devices. A local attacker in a guest could use this to cause a deni...