CVE-2021-20199
Rootless containers run with Podman, receive all traffic with a source IP address of 127.0.0.1 (including from remote hosts). This impacts containerized applications that trust localhost (127.0.01)
02 Description
Rootless containers run with Podman, receive all traffic with a source IP address of 127.0.0.1 (including from remote hosts). This impacts containerized applications that trust localhost (127.0.01)
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 1.15% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 66.9% of scored records. A rank, not a probability.
- NVD base score
- 5.9 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2021-02-02 18:12Z5 YR AGO
- Last updated
- 2024-08-03 17:30Z2 YR AGO
- Reserved
- 2020-12-17
- Assigning CNA
- redhat
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-346Origin Validation ErrorClass
- Data version
- 5.1
- Document digest
- c0f332c7e2988f2393ae52c828fb5cc652f558b2ccfea107c317534d20cb3441
05 Affected products
06 References
07 Fixed in
AlmaLinux 8
- cockpit-podman Fixed in 29-2.module_el8.6.0+2876+9ed4eae2
- conmon Fixed in 2:2.0.26-1.module_el8.6.0+2876+9ed4eae2
- containernetworking-plugins Fixed in 0.9.1-1.module_el8.6.0+2876+9ed4eae2
- crit Fixed in 3.15-1.module_el8.6.0+2876+9ed4eae2
- criu Fixed in 3.15-1.module_el8.6.0+2876+9ed4eae2
- fuse-overlayfs Fixed in 1.4.0-2.module_el8.6.0+2876+9ed4eae2
- libslirp Fixed in 4.3.1-1.module_el8.6.0+2876+9ed4eae2
- libslirp-devel Fixed in 4.3.1-1.module_el8.6.0+2876+9ed4eae2
- python3-criu Fixed in 3.15-1.module_el8.6.0+2876+9ed4eae2
- slirp4netns Fixed in 1.1.8-1.module_el8.6.0+2876+9ed4eae2
- udica Fixed in 0.2.4-1.module_el8.6.0+2876+9ed4eae2
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
AlmaLinux 9
- podman Fixed in 2:4.2.0-3.el9
- podman-docker Fixed in 2:4.2.0-3.el9
- podman-gvproxy Fixed in 2:4.2.0-3.el9
- podman-plugins Fixed in 2:4.2.0-3.el9
- podman-remote Fixed in 2:4.2.0-3.el9
- podman-tests Fixed in 2:4.2.0-3.el9
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Arch Linux
- podman Fixed in 3.0.0-1
Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.
CloudLinux 8
- cockpit-podman Fixed in 29-2.module_el8.6.0+2876+9ed4eae2
- conmon Fixed in 2:2.0.26-1.module_el8.6.0+2876+9ed4eae2
- containernetworking-plugins Fixed in 0.9.1-1.module_el8.6.0+2876+9ed4eae2
- crit Fixed in 3.15-1.module_el8.6.0+2876+9ed4eae2
- criu Fixed in 3.15-1.module_el8.6.0+2876+9ed4eae2
- fuse-overlayfs Fixed in 1.4.0-2.module_el8.6.0+2876+9ed4eae2
- libslirp Fixed in 4.3.1-1.module_el8.6.0+2876+9ed4eae2
- libslirp-devel Fixed in 4.3.1-1.module_el8.6.0+2876+9ed4eae2
- python3-criu Fixed in 3.15-1.module_el8.6.0+2876+9ed4eae2
- slirp4netns Fixed in 1.1.8-1.module_el8.6.0+2876+9ed4eae2
- udica Fixed in 0.2.4-1.module_el8.6.0+2876+9ed4eae2
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 9
- podman Fixed in 2:4.2.0-3.el9
- podman-docker Fixed in 2:4.2.0-3.el9
- podman-gvproxy Fixed in 2:4.2.0-3.el9
- podman-plugins Fixed in 2:4.2.0-3.el9
- podman-remote Fixed in 2:4.2.0-3.el9
- podman-tests Fixed in 2:4.2.0-3.el9
Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- libpod Fixed in 3.0.0~rc2+dfsg1-2
- rootlesskit Fixed in 0.12.0-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- rootlesskit Fixed in 0.12.0-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- rootlesskit Fixed in 0.12.0-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 22.04 LTS
- libpod No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 24.04 LTS
- libpod No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.