CVE-2021-4024

podman: podman machine spawns gvproxy with port bound to all IPs

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Se ha encontrado un fallo en podman. La función "podman machine" (usada para crear y administrar la máquina virtual Podman que contiene un proceso Podman) genera un proceso "gvproxy" en el sistema anfitrión. La API "gvproxy" es accesible en el puerto 7777 en todas las direcciones IP del host. Si ese puerto está abierto en el firewall del host, un atacante puede potencialmente usar la API "gvproxy" para reenviar puertos en el host a puertos en la VM, haciendo que los servicios privados en la VM sean accesibles a la red. Este problema también podría ser usado para interrumpir los servicios del host reenviando todos los puertos a la VM

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

Low

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

Low

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-11-26 CVE Reserved
2021-12-23 CVE Published
2024-08-03 CVE Updated
2024-09-07 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
CWE-346: Origin Validation Error

CAPEC

References (5)

URL	Tag	Source
https://bugzilla.redhat.com/show_bug.cgi?id=2026675%2C	X_refsource_misc
https://github.com/containers/podman/releases/tag/v3.4.3	Release Notes

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QFFVJ6S3ZRMPDYB7KYAWEMDHXFZYQPU3	2023-11-07
https://access.redhat.com/security/cve/CVE-2021-4024	2022-11-15
https://bugzilla.redhat.com/show_bug.cgi?id=2026675	2022-11-15

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Podman Project Search vendor "Podman Project"		Podman Search vendor "Podman Project" for product "Podman"				>= 3.3.0 < 3.4.3 Search vendor "Podman Project" for product "Podman" and version " >= 3.3.0 < 3.4.3"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				34 Search vendor "Fedoraproject" for product "Fedora" and version "34"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				35 Search vendor "Fedoraproject" for product "Fedora" and version "35"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				8.0 Search vendor "Redhat" for product "Enterprise Linux" and version "8.0"		-		Affected