What is a honeypot? How they are used in cybersecurity

Cybersecurity experts strive to enhance the security and privacy of computer systems. Quietly observing threat actors in action can help them understand what they have to defend against. A honeypot is one such tool that enables security professionals to catch bad actors in the act and gather data...

UBUNTU-CVE-2021-3416

A potential stack overflow via infinite loop issue was found in various NIC emulators of QEMU in versions up to and including 5.2.0. The issue occurs in loopback mode of a NIC wherein reentrant DMA checks get bypassed. A guest user/process may use this flaw to consume CPU cycles or crash the QEMU...

The vulnerability of the KVM GET_EMULATED_CPUID request in Linux kernel, related to the operation exceeding the data buffer’s permissible limits, allows an attacker to compromise data integrity and cause service failures. [source-iocs-preserved const=KVM_GET_EMULATED_CPUID]

The vulnerability of the KVM GETEMULATEDCPUID function in Linux operating systems is related to the operation exceeding the permissible data buffer limits. Exploiting this vulnerability can allow an attacker to compromise data integrity and cause service failures. source-iocs-preserved...

kernel: out of bounds write in function i2c_smbus_xfer_emulated in drivers/i2c/i2c-core-smbus.c

An out of bounds OOB memory access flaw was found in i2csmbusxferemulated in drivers/i2c/i2c-core-smbus.c in I2C subsystem. A read request for length data-block0 greater than 'I2CSMBUSBLOCKMAX + 1' may cause underlying I2C driver write out of array's boundary. This could allow a local attacker wi...

Kernel: kvm: OOB memory write via kvm_dev_ioctl_get_cpuid

An out-of-bounds memory write issue was found in the way the Linux kernel's KVM hypervisor handled the 'KVMGETEMULATEDCPUID' ioctl2 request to get CPUID features emulated by the KVM hypervisor. A user or process able to access the '/dev/kvm' device could use this flaw to crash the system, resulti...

Cisco IOx Application Environment for IOS Software for Cisco Industrial Routers Multiple Vulnerabilities (cisco-sa-ios-iot-gos-vuln-s9qS8kYL)

According to its self-reported version, Cisco IOS Software is affected by multiple vulnerabilities in the IOx application environment of Cisco 809 and 829 Industrial Integrated Services Routers Industrial ISRs and Cisco 1000 Series Connected Grid Routers CGR1000. Attackers can exploit these in...

Anti-Phishing process with advanced phishing attacks simulation

This time I want to write about the service of my friends from Antiphish. They call it “security awareness and employee behaviour management platform”. Simply put, they teach company employees how to detect and avoid phishing attacks. By the way, they are great guys, made a demo for me, prepared...

CVE-2019-14326

An issue was discovered in AndyOS Andy versions up to 46.11.113. By default, it starts telnet and ssh ports 22 and 23 with root privileges in the emulated Android system. This can be exploited by remote attackers to gain full access to the device, or by malicious apps installed inside the emulato...

Thinking Outside the Bochs: Code Grafting to Unpack Malware in Emulation

This blog post continues the FLARE script series with a discussion of patching IDA Pro database files IDBs to interactively emulate code. While the fastest way to analyze or unpack malware is often to run it, malware won’t always successfully execute in a VM. I use IDA Pro’s Bochs integration in...

kernel: kvm: guest userspace to guest kernel write

A flaw was found in the way Linux kernel KVM hypervisor emulated instructions such as sgdt/sidt/fxsave/fxrstor. It did not check current privilegeCPL level while emulating unprivileged instructions. An unprivileged guest user/process could use this flaw to potentially escalate privileges inside...

cPanel Input Validation Error Vulnerability (CNVD-2019-26343)

cPanel is a set of Web-based automated colocation platform from the US-based cPanel. The platform is primarily used to automate the management of websites and servers. An input validation error vulnerability exists in versions of cPanel prior to 64.0.21. The vulnerability stems from a web-based...

CVE-2019-2235

Buffer overflow occurs when emulated RPMB is used due to sector size assumptions in the TA rollback protection logic. in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer Electronics Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobil...

Nextcloud: Passcode Protection in Android Devices Can be Bypassed.

What is The Vulnerability? The Passcode can be bypassed by calling a MainLoginActivity which is com.owncloud.android.ui.activity.FileDisplayActivity , We have successfully bypassed the passcode and are redirected to the App's User Interface. of the user’s credentials: Android Version: 9 Non Roote...

Fedora 28 : xen (2018-a7862a75f5)

preemption checks bypassed in x86 PV MM handling XSA-264, CVE-2018-12891 1595959 x86: DB exception safety check can be triggered by a guest XSA-265, CVE-2018-12893 1595958 libxl fails to honour readonly flag on HVM emulated SCSI disks XSA-266, CVE-2018-12892 1595957 Note that Tenable Network...

The vulnerability of the Qemu hardware emulation’s load_multiboot function, related to writing beyond the buffer boundaries of memory, allows a attacker to trigger a service failure or execute arbitrary code.

The vulnerability of the loadmultiboot function in the hw/i386/multiboot.c file of the Qemu hardware emulation driver is related to an error that causes writing outside the allocated memory buffer during multi-boot operations. Exploiting this vulnerability allows a attacker to execute arbitrary...

CVE-2018-10853

A flaw was found in the way Linux kernel KVM hypervisor before 4.18 emulated instructions such as sgdt/sidt/fxsave/fxrstor. It did not check current privilegeCPL level while emulating unprivileged instructions. An unprivileged guest user/process could use this flaw to potentially escalate...

SUSE SLES12 Security Update : xen (SUSE-SU-2018:2081-1)

This update for xen fixes the following issues: Security issues fixed : - CVE-2018-12891: Fix preemption checks bypass in x86 PV MM handling XSA-264 bsc1097521. - CVE-2018-12892: Fix libxl failure to honour readonly flag on HVM emulated SCSI disks XSA-266 bsc1097523. - CVE-2018-12893: Fix DB...

[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 -...

Kernel: kvm: use after free in complete_emulated_mmio

arch/x86/kvm/emulate.c in the Linux kernel through 4.9.3 allows local users to obtain sensitive information from kernel memory or cause a denial of service use-after-free via a crafted application that leverages instruction emulation for fxrstor, fxsave, sgdt, and sidt...

The vulnerability of the QEMU hardware emulation software, which allows a hacker to trigger a service failure

The vulnerability of the emulatedapdufromguest function in the usb/dev-smartcard-reader.c file of the QEMU hardware emulation software, which supports emulation of CCID Card devices, is caused by a numerical overflow. Exploiting this vulnerability could allow an attacker, operating locally, to...