January 2024 - Podman - Podman List Archives

# in environment ?
by lejeczek 09 Aug '25

09 Aug '25

Hi guys. Do you use # in your envs? I wonder if it's just me having issues with those. For a test, to reproduce the issue, 'ghost' web solution would be easy & quick: -> $ podman run -dt ...................... --env database__client=mysql --env database__connection__host=11.1.0.1 --env database__connection__user=ghostadm --env database__connection__password='xyz#admghost' --env database__connection__database=ghost_xyz --env url=https://ghost.xyz So far all I've tried with 'database__connection__password' failed, quoting &| escaping. I often use # - does anybody have a way to make it work? many thanks, L.

3 3

RunRoot & mistaken IDs
by lejeczek 03 Jul '25

03 Jul '25

Hi guys. I experience this: -> $ podman images WARN[0000] RunRoot is pointing to a path (/run/user/1007/containers) which is not writable. Most likely podman will fail. Error: creating events dirs: mkdir /run/user/1007: permission denied -> $ id uid=2001(podmania) gid=2001(podmania) groups=2001(podmania) context=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 I think it might have something to do with the fact that I changed UID for the user, but why would this be? How troubleshoot & fix it, ideally without system reboot? many thanks, L.

4 11

shouldn't the current directory be the default context for "podman build"?
by Robert P. J. Day 12 Dec '24

12 Dec '24

"man podman-build" suggests that the context argument is optional: SYNOPSIS podman build [options] [context] podman image build [options] [context] ... If no context directory is specified, then Podman will assume the current working directory as the build context, which should contain the Containerfile. but if i have a directory with nothing but a Containerfile, i get: $ podman build Error: no context directory specified, and no containerfile specified $ OTOH, specifying context of current directory: $ podman build . STEP 1: FROM alpine:latest ... etc etc ... thoughts? rday

4 5

Podman Community Meeting next Tuesday Feb 6, 2024, 11:00 am EST (UTC-4)
by Tom Sweeney 30 Jan '24

30 Jan '24

Hey All, The next Podman Community Meeting is happening in just over one week from now at 11:00am EST (UTC-4) Tue Feb 6, 2024. We'll be talking about Podman at Home, and more! Agenda with video conference url: https://hackmd.io/fc1zraYdS0-klJ2KJcfC7w?both t

1 0

Re: [Vulnerability Report] ctr-cnt: Host containers count info leak
by wanglei (M) 26 Jan '24

26 Jan '24

Dear Akihiro Suda, Mrunal Patel: Thank you for your reply and I respect your opinion. For Docker, Containerd, Podman, and other runtimes, shall we add refcnt to maskedpath when setting spec? From: Mrunal Patel [mailto:mpatel@redhat.com] Send: 2024年1月26日 5:38 To: Akihiro Suda <suda.kyoto(a)gmail.com> CC: wanglei (M) <wanglei249(a)huawei.com>; Security@Docker <security(a)docker.com>; security(a)containerd.io; podman(a)lists.podman.io; cncf-crio-security(a)lists.cncf.io; security(a)opencontainers.org; Heyuandong <heyuandong(a)huawei.com> Subject: Re: [Vulnerability Report] ctr-cnt: Host containers count info leak I agree that this isn't a vulnerability. On Thu, Jan 25, 2024 at 1:29 PM Akihiro Suda <suda.kyoto(a)gmail.com<mailto:suda.kyoto@gmail.com>> wrote: I don't think this is a vuln. Containers have been leaking loadavg, memory usage, disk usage, and other resource counters too. 2024年1月25日(木) 18:09 'wanglei (M)' via OCI Security <security(a)opencontainers.org<mailto:security@opencontainers.org>>: Dear Container Security Teams: I hope this message finds you well. My name is LEI WANG, a container security newb. I am writing to report a security vulnerability about host containers count info leakage. ________________________________ 1. Information Item Details Note Project docker<https://github.com/moby/moby> containerd<https://https/github.com/containerd/containerd> podman<https://github.com/containers/podman> crio runc<https://github.com/opencontainers/runc> Due to the widespread impact, we have also copied runc … If other container software is affected, please forward the email. Affect Version all CVSS 4.3 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N Author LEI WANG Github-ID: ssst0n3<http://github.com/ssst0n3> 2. Original Features Container runtimes manage the file system using graph drivers such as overlay and devicemapper, which are loaded as modules into the kernel. The container runtime shares the host’s sysfs, where /sys/module/<MODULE_NAME>/refcnt represents the reference count of the corresponding module. The reference count of these modules typically matches the number of mounted file systems on the host, thereby leaking the number of running containers on the host. 3. Vulnerability 3.1 Description Files such as /sys/module/overlay/refcnt reveal the number of containers running on the host because the sysfs of the host is shared when the container is running. 3.2 Impact All versions of the all runtime are affected * docker * containerd * cri-o * podman * … Given the breadth of the impact on the runtime, it may be necessary to copy runc. Disclosure of the number of containers running on a host can provide several potential advantages to an attacker: 1. Target value assessment: If an attacker knows that a system is running a large number of containers, the system may host multiple services or applications, indicating that the target is a high-value target. 2. Resource utilization and load information: The number of containers can give attackers some clues about system resource utilization and load. For example, a host running a large number of containers may have high resource usage, which may allow attackers to use this information to launch denial-of-service (DoS) or distributed denial-of-service (DDoS) attacks. 3. Attack vector identification: Knowing the number of containers may also help attackers infer potential attack vectors. For example, if many containers are running, attackers may assume that some of these containers may not have proper security configuration or timely software updates. 4. Penetration policy planning: Attackers may plan multi-phase attacks or select the most likely unhardened container intrusion based on the number of containers and their speculation about the system architecture. 3.3 CVSS 4.3 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N<https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/…> vector score reason Attack Vector Local Attack Complexity Low Privileges Required None User Interaction None Scope Changed Confidentiality Low Integrity None Availability None 4. PoC $ docker ps |wc -l 7 $ docker run -ti ubuntu cat /sys/module/overlay/refcnt 7 $ docker run -tid ubuntu bash 78f902370c4bc18b787b95bca5079c052b8b7acd3e43cb7ccff01d8c4c740094 $ docker run -ti ubuntu cat /sys/module/overlay/refcnt 8 5. Fixing Suggestion Add refcnt to maskedpath by referring to the method of setting maskedpath in Docker. https://github.com/moby/moby/blob/25.0/oci/defaults.go#L105-L116 MaskedPaths: []string{ "/proc/asound", "/proc/acpi", "/proc/kcore", "/proc/keys", "/proc/latency_stats", "/proc/timer_list", "/proc/timer_stats", "/proc/sched_debug", "/proc/scsi", "/sys/firmware", "/sys/devices/virtual/powercap", }, 6. Others Should this issue be confirmed as a vulnerability, I kindly request assistance in obtaining a CVE-ID. I would appreciate it if the credit for this discovery could be assigned to my GitHub ID: ssst0n3. If you require any further assistance, please feel free to contact me at your convenience. ________________________________ Thank you for your time and attention to this matter. We look forward to your response and guidance on the next steps. Best regards, LEI WANG -- To unsubscribe from this group and stop receiving emails from it, send an email to security+unsubscribe(a)opencontainers.org<mailto:security+unsubscribe@opencontainers.org>. -- To unsubscribe from this group and stop receiving emails from it, send an email to security+unsubscribe(a)opencontainers.org<mailto:security+unsubscribe@opencontainers.org>.

2 1

Re: [Vulnerability Report] ctr-cnt: Host containers count info leak
by Akihiro Suda 25 Jan '24

25 Jan '24

I don't think this is a vuln. Containers have been leaking loadavg, memory usage, disk usage, and other resource counters too. 2024年1月25日(木) 18:09 'wanglei (M)' via OCI Security < security(a)opencontainers.org>: > Dear Container Security Teams: > > I hope this message finds you well. My name is LEI WANG, a container > security newb. I am writing to report a security vulnerability about host > containers count info leakage. > ------------------------------ > 1. Information > > *Item* > > *Details* > > *Note* > > Project > > docker <https://github.com/moby/moby> > > containerd <https://https/github.com/containerd/containerd> > > podman <https://github.com/containers/podman> > > > > crio > > > > runc <https://github.com/opencontainers/runc> > > Due to the widespread impact, we have also copied runc > > … > > If other container software is affected, please forward the email. > > Affect Version > > all > > CVSS > > 4.3 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N > > Author > > LEI WANG > > Github-ID: ssst0n3 <http://github.com/ssst0n3> > 2. Original Features > > Container runtimes manage the file system using graph drivers such as > overlay and devicemapper, which are loaded as modules into the kernel. > > The container runtime shares the host’s sysfs, where > /sys/module/<MODULE_NAME>/refcnt represents the reference count of the > corresponding module. The reference count of these modules typically > matches the number of mounted file systems on the host, thereby leaking the > number of running containers on the host. > 3. Vulnerability > 3.1 Description > > Files such as /sys/module/overlay/refcnt reveal the number of containers > running on the host because the sysfs of the host is shared when the > container is running. > 3.2 Impact > > All versions of the all runtime are affected > > - docker > - containerd > - cri-o > - podman > - … > > Given the breadth of the impact on the runtime, it may be necessary to > copy runc. > > Disclosure of the number of containers running on a host can provide > several potential advantages to an attacker: > > 1. *Target value assessment*: If an attacker knows that a system is > running a large number of containers, the system may host multiple services > or applications, indicating that the target is a high-value target. > > 2. *Resource utilization and load information*: The number of > containers can give attackers some clues about system resource utilization > and load. For example, a host running a large number of containers may have > high resource usage, which may allow attackers to use this information to > launch denial-of-service (DoS) or distributed denial-of-service (DDoS) > attacks. > > 3. *Attack vector identification*: Knowing the number of containers > may also help attackers infer potential attack vectors. For example, if > many containers are running, attackers may assume that some of these > containers may not have proper security configuration or timely software > updates. > > 4. *Penetration policy planning*: Attackers may plan multi-phase > attacks or select the most likely unhardened container intrusion based on > the number of containers and their speculation about the system > architecture. > 3.3 CVSS > > 4.3 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N > <https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/…> > > *vector* > > *score* > > *reason* > > Attack Vector > > Local > > Attack Complexity > > Low > > Privileges Required > > None > > User Interaction > > None > > Scope > > Changed > > Confidentiality > > Low > > Integrity > > None > > Availability > > None > 4. PoC > > $ docker ps |wc -l > > 7 > > $ docker run -ti ubuntu cat /sys/module/overlay/refcnt > > 7 > > $ docker run -tid ubuntu bash > > 78f902370c4bc18b787b95bca5079c052b8b7acd3e43cb7ccff01d8c4c740094 > > $ docker run -ti ubuntu cat /sys/module/overlay/refcnt > > 8 > > 5. Fixing Suggestion > > Add refcnt to maskedpath by referring to the method of setting maskedpath > in Docker. > > https://github.com/moby/moby/blob/25.0/oci/defaults.go#L105-L116 > > MaskedPaths: []string{ > > "/proc/asound", > > "/proc/acpi", > > "/proc/kcore", > > "/proc/keys", > > "/proc/latency_stats", > > "/proc/timer_list", > > "/proc/timer_stats", > > "/proc/sched_debug", > > "/proc/scsi", > > "/sys/firmware", > > "/sys/devices/virtual/powercap", > > }, > > 6. Others > > Should this issue be confirmed as a vulnerability, I kindly request > assistance in obtaining a CVE-ID. I would appreciate it if the credit for > this discovery could be assigned to my GitHub ID: ssst0n3. If you require > any further assistance, please feel free to contact me at your convenience. > ------------------------------ > > Thank you for your time and attention to this matter. We look forward to > your response and guidance on the next steps. > > Best regards, > > LEI WANG > > > > -- > To unsubscribe from this group and stop receiving emails from it, send an > email to security+unsubscribe(a)opencontainers.org. >

2 1

Podman Community Meeting Tuesday February 6, 2024, 11:00 am EST (UTC-5)
by Tom Sweeney 23 Jan '24

23 Jan '24

Hey All! The next Podman Community Meeting is happening two weeks from today. Tuesday February 6, 2024, 11:00am EST (UTC-5). We have one probable topic now and would love to have one or two more! Agenda with conference link: https://hackmd.io/fc1zraYdS0-klJ2KJcfC7w?both Hope to see you there! t

2 1

Podman v4.9.0 Released
by Ashley Cui 23 Jan '24

23 Jan '24

We’re excited to announce that Podman v4.9.0 has been released! Here's what's new: Features - The podman farm suite of commands for multi-architecture builds is now fully enabled and documented. - Add a network recovery service to Podman Machine VMs using the QEMU backend to detect and recover from an inoperable host networking issues experienced by Mac users when running for long periods of time. Bugfixes - Fixed a bug where the HyperV provider for podman machine did not forward the API socket to the host machine. - Fixed a bug where improperly formatted annotations passed to podman kube play could cause Podman to panic. - Fixed a bug where podman system reset could fail if non-Podman containers (e.g. containers created by Buildah) were present. Misc - Containers run in podman machine VMs now default to a PID limit of unlimited, instead of 2048. Try it out and let us know what you think! -- Ashley Cui

1 0

scp'ing a podman image to another host
by Matthias Apitz 19 Jan '24

19 Jan '24

I have an image on RH 8.x which runs fine (containing a SuSE SLES and PostgreSQL server): $ podman images REPOSITORY TAG IMAGE ID CREATED SIZE localhost/suse latest c87c80c0911a 26 hours ago 6.31 GB registry.suse.com/bci/bci-base 15.4 5bd0e4152d92 2 weeks ago 123 MB I created a connection to another host as: $ podman system connection list Name URI Identity Default srap57 ssh://apitzm@srap57dxr1.dev.xxxxxx.org:22/run/user/200007/podman/podman.sock true To the other host I can SSH fine based on RSA public/private keys and podman is installed there to: $ ssh apitzm(a)srap57dxr1.dev.xxxxxx.org Last login: Wed Jan 10 14:05:12 2024 from 10.201.64.28 apitzm@srap57dxr1:~> podman version Client: Podman Engine Version: 4.7.2 API Version: 4.7.2 Go Version: go1.21.4 Built: Wed Nov 1 13:00:00 2023 When I now copy over the image with: $ podman image scp c87c80c0911a srap57:: it transfers the ~6 GByte (I can see them in /tmp as a big tar file of tar files) and at the end it says: ... Writing manifest to image destination $ (i.e. the shell prompt is there again) But on srap57dxr1.dev.xxxxxx.org I can't see anything of the image at the end. What I've done wrong? Thanks matthias -- Matthias Apitz, ✉ guru(a)unixarea.de, http://www.unixarea.de/ +49-176-38902045 Public GnuPG key: http://www.unixarea.de/key.pub I am not at war with Russia. Я не воюю с Россией. Ich bin nicht im Krieg mit Russland.

4 14

Running x86_64-based containers on Mac computers with an Apple silicon (M1) processor
by Matthias Apitz 18 Jan '24

18 Jan '24

Hello, For the purpose of the Subject: there is a tutorial at IBM.com: https://developer.ibm.com/tutorials/running-x86-64-containers-mac-silicon-m… I've followed this tutorial, with a small exception, see below. The first step is to 'init' the machine with: $ podman machine init --image-path ~/yourFedoraImageFolder/fedora-coreos-39.20231204.3.3-qemu.x86_64.qcow2.xz intel Extracting compressed file: intel_fedora-coreos-39.20231204.3.3-qemu.x86_64.qco… Image resized. Machine init complete To start your machine run: podman machine start intel Which worked fine. Now, before starting the machine, the tutorial asks to remove the following lines from the config file ~/.config/containers/podman/machine/qemu/intel.json: "-machine", "q35,accel=hvf:tcg", "-cpu", "host", These line are not there 1:1 and I removed these lines: $ diff .config/containers/podman/machine/qemu/intel.json .config/containers/podman/machine/qemu/intel.json.saved2 6a7,12 > "-accel", > "hvf", > "-accel", > "tcg", > "-cpu", > "host", which seems to me correct to remove the HVF QEMU accelerator which only is supported on x86 chips. Starting the machine now with: $ podman machine start intel Di 16 Jan 2024 12:23:33 CET Starting machine "intel" Waiting for VM ... hangs for ever and the QEMU process has 100% CPU utilization: top PID COMMAND %CPU TIME #TH #WQ #PORT MEM PURG CMPRS PGRP 10802 qemu-system- 99.6 23:09.43 8/1 0 27 163M 0B 0B 10800 Any ideas? Thanks matthias -- Matthias Apitz, ✉ guru(a)unixarea.de, http://www.unixarea.de/ +49-176-38902045 Public GnuPG key: http://www.unixarea.de/key.pub I am not at war with Russia. Я не воюю с Россией. Ich bin nicht im Krieg mit Russland.

3 5