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Bug 829896 (CVE-2021-4024) - <app-containers/podman-3.4.3: insufficient network isolation
Summary: <app-containers/podman-3.4.3: insufficient network isolation
Alias: CVE-2021-4024
Product: Gentoo Security
Classification: Unclassified
Component: Vulnerabilities (show other bugs)
Hardware: All Linux
: Normal minor (vote)
Assignee: Gentoo Security
Whiteboard: B4 [glsa+]
Depends on: 829942
  Show dependency tree
Reported: 2021-12-24 05:01 UTC by John Helmert III
Modified: 2024-07-05 07:07 UTC (History)
1 user (show)

See Also:
Package list:
Runtime testing required: ---


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Description John Helmert III archtester Gentoo Infrastructure gentoo-dev Security 2021-12-24 05:01:03 UTC

A flaw was found in podman. The `podman machine` function (used to create and manage Podman virtual machine containing a Podman process) spawns a `gvproxy` process on the host system. The `gvproxy` API is accessible on port 7777 on all IP addresses on the host. If that port is open on the host's firewall, an attacker can potentially use the `gvproxy` API to forward ports on the host to ports in the VM, making private services on the VM accessible to the network. This issue could be also used to interrupt the host's services by forwarding all ports to the VM.

Fix in 3.4.3, please stabilize if suitable.
Comment 1 Zac Medico gentoo-dev 2021-12-24 22:28:12 UTC
Yes, please stabilize app-containers/podman-3.4.4.
Comment 2 Sam James archtester Gentoo Infrastructure gentoo-dev Security 2021-12-24 22:45:12 UTC
(In reply to Zac Medico from comment #1)
> Yes, please stabilize app-containers/podman-3.4.4.

Thanks Zac! Filed a separate bug as we changed the workflow recently
Comment 3 John Helmert III archtester Gentoo Infrastructure gentoo-dev Security 2021-12-26 02:08:07 UTC
Please cleanup
Comment 4 Larry the Git Cow gentoo-dev 2021-12-27 03:30:53 UTC
The bug has been closed via the following commit(s):

commit 6819900b9fa79993e945717014bcbafb8b0bfd15
Author:     Zac Medico <>
AuthorDate: 2021-12-27 03:30:03 +0000
Commit:     Zac Medico <>
CommitDate: 2021-12-27 03:30:24 +0000

    app-containers/podman: Remove vulnerable version
    Package-Manager: Portage-3.0.30, Repoman-3.0.3
    Signed-off-by: Zac Medico <>

 app-containers/podman/Manifest            |   1 -
 app-containers/podman/podman-3.4.1.ebuild | 164 ------------------------------
 2 files changed, 165 deletions(-)
Comment 5 Larry the Git Cow gentoo-dev 2024-07-05 07:06:08 UTC
The bug has been referenced in the following commit(s):

commit 3671dbb8919b2952a3de8b9a51e7573f2b16d234
Author:     GLSAMaker <>
AuthorDate: 2024-07-05 07:05:25 +0000
Commit:     Hans de Graaff <>
CommitDate: 2024-07-05 07:06:00 +0000

    [ GLSA 202407-12 ] podman: Multiple Vulnerabilities
    Signed-off-by: GLSAMaker <>
    Signed-off-by: Hans de Graaff <>

 glsa-202407-12.xml | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)