Advisory ROSA-SA-2021-1838

Software: gcc 4.8.5 OS: Cobalt 7.9 CVE-ID: CVE-2018-12886 CVE-Crit: HIGH CVE-DESC: stackprotectprologue in cfgexpand.c and stackprotectepilogue in function.c in GNU Compiler Collection GCC 4.1 through 8 under certain circumstances generate sequences of instructions when targeting ARM targets that...

Linux/ARM - execve /bin/dash Shellcode (32 bytes)

Title: Linux/ARM - execve /bin/dash Shellcode 32 bytes Category: Shellcode Tested: armv7l 32-bitRaspberry Pi 2 Model B OS: Raspbian Buster Lite Author: Anurag Srivastava Description: execve shellcode / Objdump pi@raspberrypi:/hex $ objdump -d ed1 ed1: file format elf32-littlearm Disassembly of...

Huawei EulerOS: Security Advisory for gcc (EulerOS-SA-2019-1825)

The remote host is missing an update for the Huawei EulerOS SPDX-FileCopyrightText: 2020 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

Linux/x86 - Execve() Alphanumeric Shellcode (66 bytes)

Title: Linux/x86 - Execve Alphanumeric Shellcode 66 bytes Shellcode Author: bolonobolo Tested on: Linux x86 execve.asm global start section .text start: ; int 0x80 ------------ push 0x30 pop eax xor al, 0x30 push eax pop edx dec eax xor ax, 0x4f73 xor ax, 0x3041 push eax push edx pop eax...

Linux/ARM - Fork Bomb Shellcode (20 bytes)

Title: Linux/ARM - Fork Bomb Shellcode 20 bytes Category: Shellcode Tested: armv7l 32-bitRaspberry Pi 2 Model B OS: Raspbian Buster Lite Author: CJHackerz Description: This shellcode creates new processes in infinite loop to exhaust CPU resources leading to crash / Compilation instruction...

Linux/MIPS64 - Reverse (localhost:4444/TCP) Shell Shellcode (157 bytes)

/ Reverse shell shellcode for Linux MIPS64 mips64el Default port: tcp/4444 Host: localhost Date: August 19 - 2019 Author: Antonio de la Piedra Tested on: MIPS Malta - Linux debian-mips64el 4.9.0-3-5kc-malta Size: 157 bytes Compile with: gcc -fno-stack-protector -z execstack main.c -o main -g /...

CVE-2018-12886

stackprotectprologue in cfgexpand.c and stackprotectepilogue in function.c in GNU Compiler Collection GCC 4.1 through 8 under certain circumstances generate instruction sequences when targeting ARM targets that spill the address of the stack protector guard, which allows an attacker to bypass the...

CVE-2018-12886

stackprotectprologue in cfgexpand.c and stackprotectepilogue in function.c in GNU Compiler Collection GCC 4.1 through 8 under certain circumstances generate instruction sequences when targeting ARM targets that spill the address of the stack protector guard, which allows an attacker to bypass the...

CVE-2018-12886

stackprotectprologue in cfgexpand.c and stackprotectepilogue in function.c in GNU Compiler Collection GCC 4.1 through 8 under certain circumstances generate instruction sequences when targeting ARM targets that spill the address of the stack protector guard, which allows an attacker to bypass the...

UBUNTU-CVE-2018-12886

stackprotectprologue in cfgexpand.c and stackprotectepilogue in function.c in GNU Compiler Collection GCC 4.1 through 8 under certain circumstances generate instruction sequences when targeting ARM targets that spill the address of the stack protector guard, which allows an attacker to bypass the...

CVE-2018-12886

CVE-2018-12886: In GCC 4.1–8, on ARM targets, stack_protect_prologue/epilogue may spill the stack-protector guard address, enabling an attacker to bypass -fstack-protector families by controlling what the canary is compared against. Impact is stack overflow protection bypass; no exploitation deta...

CVE-2018-12886

Removed by vendor...

EulerOS Virtualization for ARM 64 3.0.1.0 : kernel (EulerOS-SA-2019-1531)

According to the versions of the kernel packages installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerabilities : - The kernel package contains the Linux kernel vmlinuz, the core of any Linux operating system. The kernel handles the...

Linux/x86 - shred file Shellcode (72 bytes)

Exploit Title: Linux/x86 shred file 72 bytes Google Dork: None Exploit Author: strider Vendor Homepage: None Software Link: None Tested on: Debian 9 Stretch i386/ Kali Linux i386 CVE : None Shellcode Length: 72 ------------------------------Description--------------------------------- This...

Denial Of Service (DoS)

Linux kernel is vulnerable to denial of serviceDoS attacks. This occurs when gcc stack protector is enabled and uses an incorrect buffer size for certain timeout data allowing the attackers to cause a system crash by reading the /proc/keys file...

Linux/ARM - sigaction() Based Egghunter (PWN!) + execve Shellcode (52 Bytes)

/ Title: Linux/ARM - sigaction Based Egghunter PWN! + execve"/bin/sh", NULL, NULL Shellcode 52 Bytes Tested: armv7l Raspberry Pi 3 Model B+ Author: Ken Kitahara System Information pi@raspberrypi: $ uname -a Linux raspberrypi 4.14.52-v7+ 1123 SMP Wed Jun 27 17:35:49 BST 2018 armv7l GNU/Linux...

Linux/x86 - Add User(r00t/blank) Polymorphic Shellcode (103 bytes)

/ Shellcode Title: Linux/x86 - Add Userr00t/blank Polymorphic Shellcode 103 bytes Date: 2018-09-13 Author: Ray Doyle @doylersec Homepage: https://www.doyler.net Tested on: Linux/x86 gcc -o polyaddusershellcode -z execstack -fno-stack-protector polyaddusershellcode.c / / Disassembly of section...

Linux/x86 - File Modification(/etc/hosts) Polymorphic Shellcode (99 bytes)

/ Title: Linux/86 - File Modification/etc/hosts Polymorphic Shellcode 99 bytes Author: Ray Doyle @doylersec Tested on: Linux/x86 gcc -o polyhostsshellcode -z execstack -fno-stack-protector polyhostsshellcode.c / / Disassembly of section .text: 08048060 : 8048060: 29 c9 sub ecx,ecx 8048062: 51 pus...

Linux/MIPS64 - execve(/bin/sh) Shellcode (48 bytes)

Linux/MIPS64 - execve/bin/sh Shellcode 48 bytes. Shellcode exploit for LinuxMIPS platform / Title: Linux/MIPS64 - execve/bin/sh Shellcode 48 bytes Date: 2018-08-10 Author: Antonio execve/bin/sh shellcode for MIPS64 tested on MIPS Malta - Linux debian-mips64el 4.9.0-3-5kc-malta 48 bytes gcc...

QEMU - NBD Server Long Export Name Stack Buffer Overflow

Exploit for linux platform in category dos / poc Introduced in commit f37708f6b8 2.10. The NBD spec says a client can request export names up to 4096 bytes in length, even though they should not expect success on names longer than 256. However, qemu hard-codes the limit of 256, and fails to filte...