Information disclosure in Podman Project
CVE-2021-4024
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.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L.
EPSS exploit prediction
EPSS: 0.011 (66.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 66.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: +0.001
Affected products
- Podman Project
- Fedoraproject Fedora — versions 34, 35
- Red Hat Enterprise Linux — versions 8.0
- Podman — versions podman 3.4.3
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.redhat.com/show_bug.cgi
- github.com/containers/podman/releases/tag/v3.4.3 (Third Party Advisory, Release Notes)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
Frequently asked questions
- What is CVE-2021-4024?
- CVE-2021-4024 is a medium-severity vulnerability in Podman Project, classified under Information Disclosure. CVSS score: 6.5/10. Published 2021-12-23.
- How severe is CVE-2021-4024?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2021-4024 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.