CVE-2021-4024: fedoraproject fedora
Vulnerability summary
CVE-2021-4024 is a medium (CVSS 6.5) vulnerability in fedoraproject fedora. EPSS estimates a 1.14% chance of exploitation in the next 30 days, higher than 66.5% of scored vulnerabilities.
Not severe (CVSS 6.5, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 8 · Related 5Timeline
- 23-12-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
6 scores · 5 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
- OSV · GoEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
- OSV · AlpineEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
EPSS trend
Probability
1.14%
Chance of exploitation in the next 30 days
Percentile
67%
Versus all other CVEs
30-day change
Increase +0.08 pp
From 1.06% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-200Exposure of Sensitive Information to an Unauthorized ActorThe product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
- CWE-346Origin Validation ErrorThe product does not properly verify that the source of data or communication is valid.
Affected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Github.com/containers/podman2 products
- v2All versions (No fix recorded)
- v3< 3.4.3
Alpine1 product
- podman≥ 3.3.0, < 3.4.4-r0
Debian1 product
- libpod< 3.4.3+ds1-1
Fedoraproject1 product
- fedoraEOL34 | 35
Github.com/containers1 product
- podmanAll versions (No fix recorded)
Podman_project1 product
- podman≥ 3.3.0, < 3.4.3
Redhat1 product
Ubuntu1 product
- libpodAll versions (No fix recorded)
8 vendors · 9 products
References
15 links- bugzilla.redhat.com/show_bug.cgi?id=2026675%2CX Refsource MISC
- github.com/containers/podman/releases/tag/v3.4.3X Refsource MISCWEBRelease NotesThird Party Advisory
Show all 15 references
- github.com/containers/podmanPACKAGE