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NVD / CVE Program· CNA redhat

CVE-2020-10749: A vulnerability was found in all versions of containernetworking/plugins before version 0.8.6, that allows malicious containers in…

MediumCVSS 6.0 · v3.1—Proof of concept Fix available

Noroxi assessment

Priority: Monitor (action score 25/100)

  • Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 2% (FIRST EPSS); higher than 81.8% of all records.
  • Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: libslirp (AlmaLinux:8) 4.3.1-1.module_el8.6.0+2876+9ed4eae2; libslirp-devel (AlmaLinux:8) 4.3.1-1.module_el8.6.0+2876+9ed4eae2; python-podman-api (AlmaLinux:8) 1.2.0-0.2.gitd0a45fe.module_el8.5.0+108+00865455, 1.2.0-0.2.gitd0a45fe.module_el8.5.0+2635+e4386a39.

Low priority for now. Upgrade to libslirp (AlmaLinux:8) 4.3.1-1.module_el8.6.0+2876+9ed4eae2; libslirp-devel (AlmaLinux:8) 4.3.1-1.module_el8.6.0+2876+9ed4eae2; python-podman-api (AlmaLinux:8) 1.2.0-0.2.gitd0a45fe.module_el8.5.0+108+00865455, 1.2.0-0.2.gitd0a45fe.module_el8.5.0+2635+e4386a39 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

A vulnerability was found in all versions of containernetworking/plugins before version 0.8.6, that allows malicious containers in Kubernetes clusters to perform man-in-the-middle (MitM) attacks. A malicious container can exploit this flaw by sending rogue IPv6 router advertisements to the host or other containers, to redirect traffic to the malicious container.

Published
Jun 3, 2020
Updated
Jun 16, 2026
EPSS
2.0% · 81th percentile

Report tools

JSON

Action score

25

Monitor

Low priority for now.

CVSS
24 / 40 · 6.0 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 2.0%

CNA vs NVD score

NVD
6.0
CNA · redhat
6.0
agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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  • Not in KEV: no record of exploitation in the wild
  • Proof of concept exists, no weaponized module
  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxfoundationcni network plugins
redhatopenshift container platform
fedoraprojectfedora
redhatenterprise linux

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • fedoraproject fedora32
  • linuxfoundation cni network pluginsbefore 0.8.6
  • redhat enterprise linux7.0
  • redhat enterprise linux8.0
  • redhat openshift container platform4.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • Red Hat containernetworking/plugins

    • all containernetworking/plugins versions before version 0.8.6affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:8libslirpbefore 4.3.1-1.module_el8.6.0+2876+9ed4eae24.3.1-1.module_el8.6.0+2876+9ed4eae2
AlmaLinux:8libslirp-develbefore 4.3.1-1.module_el8.6.0+2876+9ed4eae24.3.1-1.module_el8.6.0+2876+9ed4eae2
AlmaLinux:8python-podman-apibefore 1.2.0-0.2.gitd0a45fe.module_el8.5.0+108+008654551.2.0-0.2.gitd0a45fe.module_el8.5.0+108+00865455
AlmaLinux:8python-podman-apibefore 1.2.0-0.2.gitd0a45fe.module_el8.5.0+2635+e4386a391.2.0-0.2.gitd0a45fe.module_el8.5.0+2635+e4386a39
Alpine:v3.13k3sbefore 1.18.3.1-r01.18.3.1-r0
Debian:12golang-github-containernetworking-pluginsbefore 0.8.6-10.8.6-1
Gogithub.com/containernetworking/pluginsbefore 0.8.60.8.6
openSUSE:Leap 15.1cni-pluginsbefore 0.8.6-lp151.2.6.10.8.6-lp151.2.6.1
openSUSE:Leap 15.2cni-pluginsbefore 0.8.6-lp152.2.4.10.8.6-lp152.2.4.1
openSUSE:Tumbleweedcni-pluginsbefore 0.9.1-1.30.9.1-1.3
Red Hat:enterprise_linux:8::appstreambuildahbefore 0:1.15.1-2.module+el8.3.0+8221+97165c3f0:1.15.1-2.module+el8.3.0+8221+97165c3f
Red Hat:enterprise_linux:8::appstreambuildah-debuginfobefore 0:1.15.1-2.module+el8.3.0+8221+97165c3f0:1.15.1-2.module+el8.3.0+8221+97165c3f
Red Hat:enterprise_linux:8::appstreambuildah-debugsourcebefore 0:1.15.1-2.module+el8.3.0+8221+97165c3f0:1.15.1-2.module+el8.3.0+8221+97165c3f
Red Hat:enterprise_linux:8::appstreambuildah-testsbefore 0:1.15.1-2.module+el8.3.0+8221+97165c3f0:1.15.1-2.module+el8.3.0+8221+97165c3f
Red Hat:enterprise_linux:8::appstreambuildah-tests-debuginfobefore 0:1.15.1-2.module+el8.3.0+8221+97165c3f0:1.15.1-2.module+el8.3.0+8221+97165c3f
Red Hat:enterprise_linux:8::appstreamcockpit-podmanbefore 0:18.1-2.module+el8.3.0+8221+97165c3f0:18.1-2.module+el8.3.0+8221+97165c3f
Red Hat:enterprise_linux:8::appstreamconmonbefore 2:2.0.20-2.module+el8.3.0+8221+97165c3f2:2.0.20-2.module+el8.3.0+8221+97165c3f
Red Hat:enterprise_linux:8::appstreamcontainer-selinuxbefore 2:2.144.0-1.module+el8.3.0+8221+97165c3f2:2.144.0-1.module+el8.3.0+8221+97165c3f
Red Hat:enterprise_linux:8::appstreamcontainernetworking-pluginsbefore 0:0.8.6-2.module+el8.3.0+8221+97165c3f0:0.8.6-2.module+el8.3.0+8221+97165c3f
Red Hat:enterprise_linux:8::appstreamcontainernetworking-plugins-debuginfobefore 0:0.8.6-2.module+el8.3.0+8221+97165c3f0:0.8.6-2.module+el8.3.0+8221+97165c3f
Red Hat:enterprise_linux:8::appstreamcontainernetworking-plugins-debugsourcebefore 0:0.8.6-2.module+el8.3.0+8221+97165c3f0:0.8.6-2.module+el8.3.0+8221+97165c3f
Red Hat:enterprise_linux:8::appstreamcontainers-commonbefore 1:1.1.1-3.module+el8.3.0+8221+97165c3f1:1.1.1-3.module+el8.3.0+8221+97165c3f
Red Hat:enterprise_linux:8::appstreamcritbefore 0:3.14-2.module+el8.3.0+8221+97165c3f0:3.14-2.module+el8.3.0+8221+97165c3f
Red Hat:enterprise_linux:8::appstreamcriubefore 0:3.14-2.module+el8.3.0+8221+97165c3f0:3.14-2.module+el8.3.0+8221+97165c3f

+65

Same product

linuxfoundation: all records

Other highest-scoring records for the same primary product.

  • CVE-2025-67499CNI Plugins Portmap nftables backend intercepts non-local traffic
    14Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
almalinux:libslirp4.3.1-1.module_el8.6.0+2876+9ed4eae2 · AlmaLinux:8Package registry (OSV)
almalinux:libslirp-devel4.3.1-1.module_el8.6.0+2876+9ed4eae2 · AlmaLinux:8Package registry (OSV)
almalinux:python-podman-api1.2.0-0.2.gitd0a45fe.module_el8.5.0+2635+e4386a39 · AlmaLinux:8Package registry (OSV)
alpine:k3s1.18.3.1-r0 · Alpine:v3.13Package registry (OSV)
debian:golang-github-containernetworking-plugins0.8.6-1 · Debian:12Package registry (OSV)
Go:github.com/containernetworking/plugins0.8.6Package registry (OSV)
opensuse:cni-plugins0.8.6-lp151.2.6.1 · openSUSE:Leap 15.1Package registry (OSV)
red hat:buildah0:1.15.1-2.module+el8.3.0+8221+97165c3f · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:buildah-debuginfo0:1.15.1-2.module+el8.3.0+8221+97165c3f · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:buildah-debugsource0:1.15.1-2.module+el8.3.0+8221+97165c3f · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:buildah-tests0:1.15.1-2.module+el8.3.0+8221+97165c3f · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:buildah-tests-debuginfo0:1.15.1-2.module+el8.3.0+8221+97165c3f · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:cockpit-podman0:18.1-2.module+el8.3.0+8221+97165c3f · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:conmon2:2.0.20-2.module+el8.3.0+8221+97165c3f · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:container-selinux2:2.144.0-1.module+el8.3.0+8221+97165c3f · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:containernetworking-plugins0:0.8.6-1.rhaos4.4.el7 · Red Hat:openshift:4.4::el7Package registry (OSV)
red hat:containernetworking-plugins-debuginfo0:0.8.6-1.rhaos4.4.el7 · Red Hat:openshift:4.4::el7Package registry (OSV)
red hat:containernetworking-plugins-debugsource0:0.8.6-1.rhaos4.4.el8 · Red Hat:openshift:4.4::el8Package registry (OSV)
red hat:containers-common1:1.1.1-3.module+el8.3.0+8221+97165c3f · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
rocky linux:libslirp0:4.3.1-1.module+el8.7.0+1076+9b1c11c1 · Rocky Linux:8Package registry (OSV)
rocky linux:python-podman-api0:1.2.0-0.2.gitd0a45fe.module+el8.5.0+770+e2f49861 · Rocky Linux:8Package registry (OSV)
rocky linux:toolbox0:0.0.8-1.module+el8.4.0+556+40122d08 · Rocky Linux:8Package registry (OSV)
suse:cni-plugins0.8.6-3.6.1 · SUSE:Linux Enterprise Module for Containers 15 SP1Package registry (OSV)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHubstars:252020-06-11

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. First PoC+8 d
  3. TodayNov 12, 2026+2353 d

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
low · data can be read
Integrity
low · data or configuration can be modified
Availability
low · the service can be disrupted

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Network
Attack complexity
High
Privileges required
Low
User interaction
None
Scope
Changed
Confidentiality impact
Low
Integrity impact
Low
Availability impact
Low

Weakness class (CWE)

CWE-300 · Channel Accessible by Non-Endpoint

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (4 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records