The seccomp() system call operates on the seccomp state of the calling process. This is achieved through the use of userfaultfd, which allows a Linux process to mark memory as missing, to receive notifications when other threads attempt to access missing memory, and to provide the contents of that memory in response to such faults. GitHub - benfred/py-spy: Sampling profiler for Python programs The following are 14 code examples for showing how to use os.spawnlp().These examples are extracted from open source projects. Upto kernel 5.11: Mesa with amdgpu uses the kcmp() syscall controlled by this config. For a full Docker Desktop experience you need VMware Fusion as it provides nested virtualization. Exercise 1.6 - SCC & Seccomp | Red Hat | Public Sector hrw/docker-utils. strace actually does work in newer versions of Docker. This includes the process_vm_readv and process_vm_writev system calls - which are also blocked by Docker's default seccomp-bpf profile when CAP_SYS_PTRACE is dropped - as well as access to some files in /proc/PID/. Administrators can manage SCCs using the CLI. It lets you visualize what your Python program is spending time on without restarting the program or modifying the code in any way. What is the difference between a process, a container, and ... These examples are extracted from open source projects. Other container solutions like Podman have . Find out what container runtime is being used as well as features available. Installation py-spy · PyPI Another good example of using this to inject code for non-malicious purposes is https . Go to settings, backup, and then click "Download file" under the backup and restore subsection. the things that move bytes between ranks) of Open MPI use to accelerate shared-memory communication between ranks that run on the same node by avoiding copying the data twice to and from a . py-spy: Sampling profiler for Python programs. [root@localhost home]# cat /etc/redhat-release CentOS Linux release 7.6.1810 (Core) [root@localhost home]# podman -v podman version 3.0.1 [root@localhost home]# docker run -dit --name zk_01 --network master-network --ip 172.20..11 zooke. It's the API used by debuggers. Essentially the problem is that allowing ptrace will allow the contained process to bypass any seccomp filter in place, allowing dangerous syscalls to be made. Container introspection tool. To quote the document. The root cause could be docker prevents this, and some sysadmin config might be required. @ax3l the issue here is that process_vm_readv() fails with EPERM which is suspicious.. You can check that using docker info or by looking in /boot/config-*: ~ $ When you execute cat /proc/$$/mem the variable $$ is evaluated by by bash which inserts its own pid. This table is a reference of linux syscalls for the amd64 architecture and their compatibility status in gVisor. Seccomp security profiles for Docker. gVisor does not support all syscalls and some syscalls may have a partial implementation. The process_vm_writev() system call is the converse of process_vm_readv()—it transfers data from the local process to the remote process. process_vm_readv system call on Linux, the vm_read call on OSX . New syscall: process_vmsplice ssize_t process_vmsplice(pid_t pid, int fd, const struct iovec *iov, unsigned long nr_segs, unsigned int flags) a hybrid of process_vm_readv() and vmsplice() No need to inject a parasite code Can dump memory iteratively - small per-iteration overhead 如果你具有一个像 --CAP_SYS_PTRACE 这样的能力，可以让你使用 process_vm_readv 系统调用，但是该系统调用被 seccomp 配置文件阻止了，那对你没有什么帮助! With the release of Docker 20.10, the rootless containers feature has left experimental status. Other than the direction of the transfer, the arguments liovcnt, local_iov, riovcnt, and remote_iov have the same meaning as for process_vm_readv(). In addition to authorization policies that control what a user can do, OpenShift Container Platform provides security context constraints (SCC) that control the actions that a pod can perform and what it has the ability to access. The profile is referenced in the docker run command when you create the DAP container.. DAP and Docker on Linux. And this is because Docker is restricting the process_vm_readv system call that py-spy uses to directly read the memory of the Python program. py-spy: Sampling profiler for Python programs. For example Docker's default seccomp profile disables approximately 44 system calls of the 300+ currently availble. I am not sure where to run it as wherever I plac. $ docker run --rm -it r.j3ss.co/amicontained Container Runtime: docker Has Namespaces: pid: true user: true User Namespace Mappings: Container -> 0 Host -> 886432 Range -> 65536 AppArmor Profile: docker-default (enforce) Capabilities: BOUNDING -> chown dac_override fowner fsetid kill setgid setuid setpcap net_bind_service net_raw sys_chroot mknod audit_write . py-spy is extremely low overhead: it is written in Rust for speed and doesn't run in the same process as the profiled Python program. The VM generated modelDescription.xml and name.js, while the docker generated name.xml and name.js. And looking at the containerd code, seccomp seems to always disable ptrace there. Now, if you're running any decently up-to-date version of Docker (1.10 or higher), then you're already using seccomp. A seccomp profile helps to enforce least privilege principles within DAP.. py-spy needs SYS_PTRACE to be able to read process memory. A DAP Server running on Linux uses the Linux Kernel Session Keyring to . The profile is referenced in the docker run command when you create the Conjur container.. Conjur and Docker on Linux. They check if user has capability CAP_SYS_PTRACE. py-spy is extremely low overhead: it is written in Rust for speed and doesn't run in the same process as the profiled Python program. It lets you visualize what your Python program is spending time on without restarting the program or modifying the code in any way. Download your current config. Persistent configuration This guide is intended for UniFi controllers hosted in a docker container, VM, or similar. Exercise 1.6 - SCC & Seccomp. --cap-add=SYS_PTRACE 보다 약간 덜 무거운 옵션은 process_vm_readv 및 process_vm_writev 를 syscalls.names 목록에 추가하여 허용 목록에 추가되도록 seccomp . Place your charge-lnd configuration in /etc/lnd-charge.config. You end up with cat trying to read the memory of bash, its parent process.Since non-privileged processes can only read their own memory space this gets denied by the kernel. Figuring out the call stack of the Python program is done by looking at the global PyInterpreterState variable to get all the Python threads running in the interpreter, and then iterating over . The Docker binary installs a docker-default profile in the /etc/apparmor.d/docker file. You can use this feature to restrict your application's access. It then executes cat which has a different pid. Virtual Machines have full isolation at the OS level, meaning they create a complete new operating system on top of the host's hardware. process_vm_readv: Restrict process inspection capabilities, already blocked by dropping CAP_PTRACE. A Conjur Server running on Linux uses the Linux Kernel Session . How do I run py-spy in Kubernetes? $ docker run --rm -it r.j3ss.co/amicontained Container Runtime: docker Has Namespaces: pid: true user: true User Namespace Mappings: Container -> 0 Host -> 886432 Range -> 65536 AppArmor Profile: docker-default (enforce) Capabilities: BOUNDING -> chown dac_override fowner fsetid kill setgid setuid setpcap net_bind_service net_raw sys . If you check permissions on that file, you will see that only same user or root may access it. py-spy is extremely low overhead: it is written in Rust for speed and doesn't run in the same process as the profiled Python program. It lets you visualize what your Python program is spending time on without restarting the program or modifying the code in any way. process_vm_writev: The following are 8 code examples for showing how to use os.P_NOWAIT () . An image is a number of layers that can be used to instantiate a container. reading memory of outer process by using ptrace(2) and process_vm_readv(2) via FFI; analyzing internal data structure in the PHP VM (aka Zend Engine) If you have a bit of extra CPU resource, the overhead of this software would be negligible. amicontained. はじめに タイトルの通り「Linuxで他プロセスのメモリを読み書きする方法」です。 Windowsの場合はOpenProcessしてプロセスのハンドルを取得した後にReadProcessMemory, WriteProcessMemoryすればOKです。 Ⅱ. On Linux, it uses the process_vm_readv system call, which lets you read memory from any other running process. able to mount but then I need to give it permission (my clumsy chown command, below). process_vm_readv Restrict process inspection . From the man page. Since the java netcat is probably the only thing running under the same uid under the docker, its pid can be enumerated by bruteforcing pids with a potential known address in its process by checking the return value of process_vm_readv. You can use it to restrict the actions available within the container. This is needed to activate Hyper-V in the Windows 10 VM. . KEYCTL MIGRATE_PAGES UNSHARE MOVE_PAGES PERF_EVENT_OPEN FANOTIFY_INIT NAME_TO_HANDLE_AT OPEN_BY_HANDLE_AT SETNS PROCESS_VM_READV PROCESS_VM_WRITEV KCMP FINIT_MODULE KEXEC_FILE_LOAD BPF USERFAULTFD PKEY_MPROTECT PKEY_ALLOC . This is because the global VM lock (GVL) only allows one thread to be running Ruby code at any given time. 0. hrw/docker-utils ⚡ Some random tools around Docker . There is a pretty clear overflow here and can lead to a ret2libc attack. CAP_SYS_PTRACE: The ability to useptrace (2)and recently introduced cross memory attach syscalls such as process_vm_readv (2)andprocess_vm_writev (2). A seccomp profile helps to enforce least privilege principles within Conjur.. - `process_vm_readv` - `process_vm_writev` these are syscalls that allow reading and writing another process's memory given we have ptrace permission (in docker everything is root, and also the docker config explicitly adds the ptrace capability, so yes) ## initial pwning. > As far as I know process_vm_readv isn't even detectable if the agent process is more privileged than the examinee process—so you're free to manipulate your private copy of the application in the comfort of your own address space. Docker Security Profile. py-spy is a sampling profiler for Python programs. py-spy: Sampling profiler for Python programs. mpi4py 그 자체로는 문제가되지 않습니다. However, it is found that the generated files are different. Already blocked by dropping CAP_PTRACE. Linux/amd64. Docker automatically loads container profiles. It lets you visualize what your Python program is spending time on without restarting the program or modifying the code in any way. If this . Netdev Archive on lore.kernel.org help / color / mirror / Atom feed * [REGRESSION] mm: process_vm_readv testcase no longer works after compat_prcoess_vm_readv removed @ 2020-10-26 22:55 Kyle Huey 2020-10-26 23:56 ` Jens Axboe 0 siblings, 1 reply; 4+ messages in thread From: Kyle Huey @ 2020-10-26 22:55 UTC (permalink / raw) To: open list, Christoph Hellwig Cc: Robert O'Callahan, Alexander Viro . In production environments, we recommend that you harden your Conjur configuration by using a seccomp profile. docker in order to ensure the security of the host, docker has opened many security settings, including ASLR (Address space layout randomization), that is, the memory address in docker is different from that of the host. In production environments, we recommend that you harden your DAP configuration by using a seccomp profile. py-spy is a sampling profiler for Python programs. It lets you visualize what your Python program is spending time on without restarting the program or modifying the code in any way. The .mo and .FMU files are here, MyTest_mo&FMU.zip There were no errors during the compiling process, as shown in the log file. I am creating a PR and will take it to ship-room for 5.0 as I am not sure when such a fix will make it to widely available docker versions. So, restricting which syscalls process can make greatly reduces attack surface of a kernel. py-spy: Sampling profiler for Python programs. When you run another OS on your host it is called a guest OS, and it runs in a Virtual Machine (VM). This is an important step for Docker security as it allows for the entire Docker installation to run with standard user prvivileges, no use of root required. FWIW의 근본 원인은 process_vm_readv() / process_vm_writev() 가 기본 Docker seccomp 프로필 에서 비활성화되어있을 가능성이 있습니다. A seccomp profile helps to enforce least privilege principles within DAP.. --cap-add=SYS_PTRACE 보다 약간 덜 무거운 옵션은 process_vm_readv 및 process_vm_writev 를 syscalls.names 목록에 추가하여 허용 목록에 추가되도록 seccomp . py-spy is a sampling profiler for Python programs. $ docker run --rm -it r.j3ss.co/amicontained Container Runtime: docker Has Namespaces: pid: true user: true User Namespace Mappings: Container -> 0 Host -> 886432 Range -> 65536 AppArmor Profile: docker-default (enforce) Capabilities: BOUNDING -> chown dac_override fowner fsetid kill setgid setuid setpcap net_bind_service net_raw sys_chroot mknod audit_write . As of this commit (docker 19.03), Docker does actually allow the ptrace system calls for kernel versions newer than 4.8. KEYCTL MIGRATE_PAGES UNSHARE MOVE_PAGES PERF_EVENT_OPEN FANOTIFY_INIT NAME_TO_HANDLE_AT OPEN_BY_HANDLE_AT SETNS PROCESS_VM_READV PROCESS_VM_WRITEV KCMP FINIT_MODULE KEXEC_FILE_LOAD BPF USERFAULTFD PKEY_MPROTECT PKEY_ALLOC . py-spy is a sampling profiler for Python programs. If you are using a CloudKey, the process is different although this guide may provide some context. This page is automatically generated from the source code. . This article is an introduction to Kubernetes security through the presentation of a new context discovery tool. py-spy is extremely low overhead: it is written in Rust for speed and doesn't run in the same process as the profiled Python program. Secure computing mode (Seccomp) is a Linux kernel feature. In production environments, we recommend that you harden your DAP configuration by using a seccomp profile. Calling process_vm_readv returns ENOSYS; ptrace seems unable to catch SIGTRAP, at least in one particular case; The Travis Changelog didn't say anything relevant, and the build logs show that the Docker images haven't been rebuilt. You can use this feature to restrict your application's access. 所以当你给容器 CAP_SYS_PTRACE 能力时，允许使用 process_vm_readv 和 ptrace 系统调用似乎是一个合理的选择。 . docker中gdb在进行进程debug时，会报错：(gdb) attach 30721Attaching to process 30721ptrace: Operation not permitted.原因就是因为ptrace被Docker默认禁止的问题。考虑到应用分析的需要，可以有以下几种方法解决：1、关闭seccompdocker run --security-opt . Docker Desktop runs fine in that VMware VM and you can try out Linux and Windows containers in it. However, in one of the constructor functions before main, a seccomp sandbox is initiated blacklisting every syscall but read, write, mprotect, mmap, munmap, process_vm_readv, process_vm_writev, exit, exit_group, gettimeofday, reboot. . prlimit64 341 name_to_handle_at 342 open_by_handle_at 343 clock_adjtime 344 syncfs 345 sendmmsg 346 setns 347 process_vm_readv 348 process_vm_writev 349 kcmp 350 finit_module 351 sched_setattr 352 sched_getattr 353 renameat2 354 seccomp 355 getrandom 356 memfd_create . Table of Contents. CAP_SYS_PTRACE: The ability to useptrace (2)and recently introduced cross memory attach syscalls such as process_vm_readv (2)andprocess_vm_writev (2). py-spy: Sampling profiler for Python programs. 这很有意义! It was built in reaction to the capture the flag challenge of the Europe 2021 KubeCon Cloud-Native Security Day CTF. process_vm_writev: Restrict process inspection capabilities, already blocked by dropping CAP_PTRACE. query_module It lets you visualize what your Python program is spending time on without restarting the program or modifying the code in any way. How does rbspy handle threads? should be privileged operation. 이 문제는 CMA (Cross-Memory Attach) 시스템 호출 process_vm_readv() 및 process_vm_writev()에서 발생합니다.Open MPI의 공유 메모리 BTL (바이트 전송 계층, 즉 랭크 간 바이트 이동)은 공유 메모리를 가속화하는 데 사용됩니다. You can also use py-spy from the Host OS to profile a running process running inside the docker container. FWIW의 근본 원인은 process_vm_readv() / process_vm_writev() 가 기본 Docker seccomp 프로필 에서 비활성화되어있을 가능성이 있습니다. py-spy works by directly reading the memory of the python program using the process_vm_readv system call on Linux, the vm_read call on OSX or the ReadProcessMemory call on Windows. Seccomp security profiles for Docker Estimated reading time: 7 minutes Secure computing mode (seccomp) is a Linux kernel feature. py-spy: Sampling profiler for Python programs. How does py-spy work? The seccomp () system call operates on the seccomp state of the calling process. On Docker running kernels after 4.8 you can use the process_vm_readv syscall to dump the memory without attaching to it, but you still can't dump the memory of any process under your user. Virtual Memory is already an isolation technique. You can use it to restrict the actions available within the container. A container is a process (or a groups of processes), but with more isolation from the OS than your run-of-the-mill process. A DAP Server running on Linux uses the Linux Kernel Session Keyring to . The issue comes from the Cross-Memory Attach (CMA) system calls process_vm_readv() and process_vm_writev() that the shared-memory BTLs (Byte Transfer Layers, a.k.a. This could be, for example, Java and Apache Tomcat. Ⅰ. To quote the document. ptrace: Tracing/profiling syscall, which could leak a lot of information on the host. Docker security profile. This profile is used on containers, not on the Docker Daemon. It should save as a .unf file. Docker Security Profile. py-spy is a sampling profiler for Python programs. If this . December 19th, 2020. AIUI Docker containers by default deny the ptrace syscall (and presumably process_vm_readv/writev), they don . You will need to expose port 10009 locally on LND to the host via a custom docker fragment. ok we'll get to this later. The seccomp() system call operates on the seccomp state of the calling process. Secure computing mode (Seccomp) is a Linux kernel feature. In order to read from or write to another process, either the caller must have the capability CAP_SYS_PTRACE, or the real user ID, effective user ID, and saved set-user-ID of the remote process must . Seccomp security profiles for Docker. Kubernetes drops that capability by default, resulting in the error I have tested a simple project both with docker and VM box. So allowing the process_vm_readv and ptrace system calls when you give the container CAP_SYS_PTRACE seems like a reasonable choice. BUT with less isolation than a VM, which comes with the tradeoff of less security. php-profiler is heavily inspired by adsr/phpspy. py-spy is extremely low overhead: it is written in Rust for speed and doesn't run in the same process as the profiled Python program. rbspy always collects the stack from what the Ruby VM reports as the currently running thread. unfork appears to be unique in that it creates the illusion of mapping the target process's memory into the source. Exploring Rootless Docker. py-spy is a sampling profiler for Python programs. # docker $ docker run --cap-add sys_ptrace -t app --name py-app # docker-compose $ docker-compose up app If you run `print dlopen ("file.so")` from GDB, this is exactly what GDB will do: it'll use ptrace to make up a stack frame to call dlopen with the arguments you specify and then hit a breakpoint, and GDB will print the result. py-spy is extremely low overhead: it is written in Rust for speed and doesn't run in the same process as the profiled Python program. You may check out the related API usage on the sidebar. py-spy: Sampling profiler for Python programs. first we need to bonk the ret2cds process . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. process_vm_{readv,writev} system calls. The profile is referenced in the docker run command when you create the DAP container.. DAP and Docker on Linux. 所以当你给容器 CAP_SYS_PTRACE 能力时，允许使用 process_vm_readv 和 ptrace 系统调用似乎是一个合理的选择。 到此，相信大家对" 为什么strace在Docker容器中无法工作"有了更深的了解，不妨来实际操作一番吧! process_vm_readv process_vm_writev these are syscalls that allow reading and writing another process's memory given we have ptrace permission (in docker everything is root, and also the docker config explicitly adds the ptrace capability, so yes) For example Docker's default seccomp profile disables approximately 44 system calls of the 300+ currently availble. It lets you visualize what your Python program is spending time on without restarting the program or modifying the code in any way. $ docker run --rm -it r.j3ss.co/amicontained Container Runtime: docker Has Namespaces: pid: true user: true User Namespace Mappings: Container -> 0 Host -> 886432 Range -> 65536 AppArmor Profile: docker-default (enforce) Capabilities: BOUNDING -> chown dac_override fowner fsetid kill setgid setuid setpcap net_bind_service net_raw sys_chroot mknod audit_write . 1.6 - SCC & amp ; seccomp: //awesomeopensource.com/project/genuinetools/amicontained? ref=reddit '' > Amicontained -! Fanotify_Init NAME_TO_HANDLE_AT OPEN_BY_HANDLE_AT SETNS process_vm_readv process_vm_writev KCMP FINIT_MODULE KEXEC_FILE_LOAD BPF USERFAULTFD PKEY_MPROTECT PKEY_ALLOC however, is. Production environments, we recommend that you harden your Conjur configuration by using a seccomp profile or... Bleepcoder.Com < /a > seccomp - test_dockerrr < /a > Docker security profile - <... 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( my clumsy chown command, below ) the calling process by default deny the ptrace system calls for versions... Docker-Default profile in the Docker generated name.xml and name.js kernel feature be, for example, Java and Tomcat. But then I need to give it permission ( my clumsy chown command, )! The remote process activate Hyper-V in the /etc/apparmor.d/docker file genuinetools/amicontained: container... < /a Linux/amd64! It to restrict your application & # x27 ; s access guide may provide some context Docker. Docker 20.10, the process is different although this guide may provide some.! Than 4.8 use py-spy from the local process to the remote process this inject. All syscalls and some sysadmin config might be required number of layers that can be used to instantiate container... On LND to the remote process harden your DAP configuration by using a CloudKey, the process different... Inject code for non-malicious purposes is https will see that only same user or root may access.... Amd64 architecture and their compatibility status in gVisor can also use py-spy from the host status in gVisor DAP by... ( used usually by debuggers ) to access other & # x27 ; ll get to this later:... 덜 무거운 옵션은 process_vm_readv 및 process_vm_writev 를 syscalls.names 목록에 추가하여 허용 목록에 seccomp! Currently running thread least privilege principles within DAP the flag challenge of the calling process restrict process capabilities. Is needed to activate Hyper-V in the Docker binary installs a docker-default profile in the /etc/apparmor.d/docker file: profiler..., named kdigger, on GitHub cat which has a different pid > GitHub - genuinetools/amicontained: container... /a. Of a new context discovery tool of Linux syscalls for the amd64 and... This table is a number of layers that can be used to instantiate a container profile - <... Windows containers in it tradeoff of less security BPF USERFAULTFD PKEY_MPROTECT PKEY_ALLOC: //docs.cyberark.com/Product-Doc/OnlineHelp/AAM-DAP/12.0/en/Content/Deployment/platforms/docker-sec-profile.htm >...: container... < /a > seccomp security profiles for Docker file & quot ; under backup. Your application & # x27 ; s root: August 2021 < >! Security profile - docs.cyberark.com < /a > Linux/amd64 access other & # x27 ; get. ) only allows one thread to be running Ruby code at any given time ) only allows thread! Default deny the ptrace syscall ( and presumably process_vm_readv/writev ), they don container DAP. Dropping CAP_PTRACE by using a seccomp profile helps to enforce least privilege principles within Conjur backup and subsection. To run it as wherever I plac the sidebar this guide may provide some context uses Linux. A custom Docker fragment: //www.programcreek.com/python/example/96487/os.spawnlp '' > py-spy 0.3.11 on PyPI - Libraries.io < /a Exploring... | bleepcoder.com < /a > Amicontained this commit ( Docker 19.03 ), Docker does actually allow the system! It to restrict your application & # x27 ; s root: August 2021 /a! For kernel versions newer than 4.8 dropping CAP_PTRACE for example, Java and Tomcat... Computing mode ( seccomp ) is a Linux kernel Session Keyring to on that file, you see... Feature to restrict your application & # x27 ; s access you visualize what your Python program is spending on... To give it permission ( my clumsy chown command, below ) VM generated modelDescription.xml and name.js for.... Operates on the seccomp ( ) system call is the converse of process_vm_readv ( ) system call operates on seccomp! And their compatibility status in gVisor to activate Hyper-V process_vm_readv docker the Docker Daemon py-spy! The Windows 10 VM process to the capture the flag challenge of the process... Good example of using this to inject code for non-malicious purposes is https the process_vm_readv docker. Click & quot ; under the backup and restore subsection: //libraries.io/pypi/py-spy '' > security... Ptrace system calls for kernel versions newer than 4.8, seccomp seems to disable! The KCMP ( ) system call operates on the seccomp state of the calling process as features available ( )!