Linux/MIPS - N32 MSB Reverse Shell Shellcode

/ mipsn32msblinuxrevsh.c - MIPS N32 MSB Linux reverse Copyright c 2022 Marco Ivaldi Basic MIPS N32 MSB Linux reverse shellcode, showcasing various techniques to avoid badchars. Cross-compile https://buildroot.org/ with: $ mips64-linux-gcc -static mipsn32msblinuxrevsh.c -o revsh Tested on Linux...

Local Privilege Escalation in polkits pkexec

A bug exists in the polkit pkexec binary in how it processes arguments. If the binary is provided with no arguments, it will continue to process environment variables as argument variables, but without any security checking. By using the execve call we can specify a null argument list and populat...

SUSE-SU-2022:0161-1 Security update for zsh

This update for zsh fixes the following issues: - CVE-2018-0502: Fixed execve call vulnerability to program named on the second line when the beginning of a ! script file was mishandled. bsc1107296, bsc1107294 - CVE-2018-13259: Fixed execve call vulnerability to program name that is a substring o...

Advisory ROSA-SA-2021-2005

Software: zsh 5.0.2 OS: Cobalt 7.9 CVE-ID: CVE-2014-10070 CVE-Crit: HIGH CVE-DESC: zsh before 5.0.7 allows the initial values of integer variables imported from the environment to be evaluated instead of treating them as literal numbers. This may allow local privilege escalation under some specif...

Linux/x86 - execve /bin/sh Shellcode (fstenv eip GetPC technique) (70 bytes, xor encoded)

Exploit Title: Linux/x86 - execve /bin/sh Shellcode fstenv eip GetPC technique 70 bytes, xor encoded Exploit Author: d7x Tested on: Ubuntu x86 / shellcode with XOR decoder stub and fstenv MMX FPU spawning a /bin/sh shell uses the fstenv GetPC technique to get the memory address dynamically...

Linux/x86 - setreuid(0) + execve(/bin/sh) Shellcode (29 bytes)

/ Author: Artur ajes Szymczak 2021 Function: Linux x86 shellcode, setreuid to 0 and then execute /bin/sh Size: 29 bytes Testing: $ gcc -fno-stack-protector -z execstack shellcodetester.c -o shellcode shellcodetester.c: In function ‘main’: shellcodetester.c:25:2: warning: incompatible implicit...

Linux/x64 - execve(/bin/sh) Shellcode (21 bytes) (2)

Linux/x64 - execve/bin/sh Shellcode 21 bytes Author: s1ege Tested on: x8664 GNU/Linux Shellcode Length: 21 / objdump disassembly 401000: 50 push %rax 401001: 48 31 d2 xor %rdx,%rdx 401004: 48 bb 2f 62 69 6e 2f movabs $0x68732f2f6e69622f,%rbx 40100b: 2f 73 68 40100e: 53 push %rbx 40100f: 54 push...

Linux/x86 - execve(/bin/sh) Shellcode (17 bytes)

Linux/x86 - execve/bin/sh Shellcode 17 bytes Author: s1ege Tested on: i686 GNU/Linux Shellcode length: 17 / ; nasm -felf32 shellcode.asm && ld -melfi386 shellcode.o -o shellcode section .text global start start: push 0x0b pop eax push 0x0068732f push 0x6e69622f mov ebx, esp int 0x80 / include...

Linux/x64 - execve (cat /etc/shadow) Shellcode (66 bytes)

Exploit Title: Linux/x64 - execve "cat /etc/shadow" Shellcode 66 bytes Author: Felipe Winsnes Tested on: Debian x64 Shellcode Length: 66 / global start start: xor rax, rax ; Zeroes out RAX. xor rbp, rbp ; Zeroes out RBP. push rax ; Pushes RAX's NULL-DWORD. mov rbp, 0x776f646168732f63 ; Moves valu...

Arbitrary Code Execution

linux is vulnerable to arbitrary code execution. The iouring takes a non-refcounted reference to the filesstruct of the process that submitted a request, causing execve to optimize unsharefd in an insecure manner and potentially allows for arbitrary code execution...

NewStart CGSL CORE 5.05 / MAIN 5.05 : kernel-rt Multiple Vulnerabilities (NS-SA-2020-0117)

The remote NewStart CGSL host, running version CORE 5.05 / MAIN 5.05, has kernel-rt packages installed that are affected by multiple vulnerabilities: - The fix for CVE-2019-11599, affecting the Linux kernel before 5.0.10 was not complete. A local user could use this flaw to obtain sensitive...

CVE-2020-29534

An issue was discovered in the Linux kernel before 5.9.3. iouring takes a non-refcounted reference to the filesstruct of the process that submitted a request, causing execve to incorrectly optimize unsharefd, aka CID-0f2122045b94...

An issue was discovered in the Linux kernel before 5.9.3. io_uring takes a non-refcounted reference to the files_struct of the process that submitted a request causing execve() to incorrectly optimize unshare_fd() aka CID-0f2122045b94.

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Improper Input Validation

zsh is vulnerable to Improper Input Validation. The library does not properly handle the beginning of a ! in script file which may potentially lead to execve call to a program named on the second line...

Unspecified vulnerability in Linux kernel (CNVD-2021-09807)

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A security vulnerability exists in versions of Linux kernel prior to 5.9.3 that stems from iouring accepting an unreferenced reference to the file structure of the process...

DEBIAN-CVE-2020-29534

An issue was discovered in the Linux kernel before 5.9.3. iouring takes a non-refcounted reference to the filesstruct of the process that submitted a request, causing execve to incorrectly optimize unsharefd, aka CID-0f2122045b94...

CVE-2020-29534

An issue was discovered in the Linux kernel before 5.9.3. iouring takes a non-refcounted reference to the filesstruct of the process that submitted a request, causing execve to incorrectly optimize unsharefd, aka CID-0f2122045b94...

CVE-2020-29534

An issue was discovered in the Linux kernel before 5.9.3. iouring takes a non-refcounted reference to the filesstruct of the process that submitted a request, causing execve to incorrectly optimize unsharefd, aka CID-0f2122045b94...

CVE-2020-29534

An issue was discovered in the Linux kernel before 5.9.3. iouring takes a non-refcounted reference to the filesstruct of the process that submitted a request, causing execve to incorrectly optimize unsharefd, aka CID-0f2122045b94...

UBUNTU-CVE-2020-29534

An issue was discovered in the Linux kernel before 5.9.3. iouring takes a non-refcounted reference to the filesstruct of the process that submitted a request, causing execve to incorrectly optimize unsharefd, aka CID-0f2122045b94...