CVE-2018-1002105

CVE-2018-1002105 is a critical-severity vulnerability in Kubernetes with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 87% places it in the 100th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-388.

Key facts

• Severity: Critical (CVSS 3.x base score 9.8)
• CVSS v2: 7.5
• EPSS exploit prediction: 87% (100th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-388
• Affected product: Kubernetes
• Published: 2018-12-05
• Last modified: 2026-06-17

Description

In all Kubernetes versions prior to v1.10.11, v1.11.5, and v1.12.3, incorrect handling of error responses to proxied upgrade requests in the kube-apiserver allowed specially crafted requests to establish a connection through the Kubernetes API server to backend servers, then send arbitrary requests over the same connection directly to the backend, authenticated with the Kubernetes API server's TLS credentials used to establish the backend connection.

Frequently asked questions

What is CVE-2018-1002105?

In all Kubernetes versions prior to v1.10.11, v1.11.5, and v1.12.3, incorrect handling of error responses to proxied upgrade requests in the kube-apiserver allowed specially crafted requests to establish a connection through the Kubernetes API server to backend servers, then send arbitrary requests over the same connection directly to the backend, authenticated with the Kubernetes API server's TLS credentials used to establish the backend connection.

How severe is CVE-2018-1002105?

CVE-2018-1002105 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-1002105 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 87% (100th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-1002105?

CVE-2018-1002105 primarily affects Kubernetes. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-1002105?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2018-1002105 published?

CVE-2018-1002105 was published on 2018-12-05 and last updated on 2026-06-17.

References

• http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00041.html
• http://www.openwall.com/lists/oss-security/2019/06/28/2
• http://www.openwall.com/lists/oss-security/2019/07/06/3
• http://www.openwall.com/lists/oss-security/2019/07/06/4
• http://www.securityfocus.com/bid/106068
• https://access.redhat.com/errata/RHSA-2018:3537
• https://access.redhat.com/errata/RHSA-2018:3549
• https://access.redhat.com/errata/RHSA-2018:3551
• https://access.redhat.com/errata/RHSA-2018:3598
• https://access.redhat.com/errata/RHSA-2018:3624
• https://access.redhat.com/errata/RHSA-2018:3742
• https://access.redhat.com/errata/RHSA-2018:3752
• https://access.redhat.com/errata/RHSA-2018:3754
• https://github.com/evict/poc_CVE-2018-1002105
• https://github.com/kubernetes/kubernetes/issues/71411
• https://groups.google.com/forum/#%21topic/kubernetes-announce/GVllWCg6L88
• https://security.netapp.com/advisory/ntap-20190416-0001/
• https://www.coalfire.com/The-Coalfire-Blog/December-2018/Kubernetes-Vulnerability-What-You-Can-Should-Do
• https://www.exploit-db.com/exploits/46052/
• https://www.exploit-db.com/exploits/46053/

Affected products (11)

• cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*
• cpe:2.3:a:kubernetes:kubernetes:1.9.12:beta0:*:*:*:*:*:*
• cpe:2.3:a:redhat:openshift_container_platform:3.2:*:*:*:*:*:*:*
• cpe:2.3:a:redhat:openshift_container_platform:3.3:*:*:*:*:*:*:*
• cpe:2.3:a:redhat:openshift_container_platform:3.4:*:*:*:*:*:*:*
• cpe:2.3:a:redhat:openshift_container_platform:3.5:*:*:*:*:*:*:*
• cpe:2.3:a:redhat:openshift_container_platform:3.6:*:*:*:*:*:*:*
• cpe:2.3:a:redhat:openshift_container_platform:3.8:*:*:*:*:*:*:*
• cpe:2.3:a:redhat:openshift_container_platform:3.10:*:*:*:*:*:*:*
• cpe:2.3:a:redhat:openshift_container_platform:3.11:*:*:*:*:*:*:*
• cpe:2.3:a:netapp:trident:-:*:*:*:*:*:*:*

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Other CWE-388 vulnerabilities

• CVE-2017-5401 — Critical (CVSS 9.8): A crash triggerable by web content in which an "ErrorResult" references unassigned memory due to a logic error. The…
• CVE-2016-10466 — Critical (CVSS 9.8): In Android before 2018-04-05 or earlier security patch level on Qualcomm Snapdragon Mobile and Snapdragon Wear MDM9206,…
• CVE-2016-10414 — Critical (CVSS 9.8): In Android before 2018-04-05 or earlier security patch level on Qualcomm Small Cell SoC, Snapdragon Automobile,…
• CVE-2015-9120 — Critical (CVSS 9.8): In Android before 2018-04-05 or earlier security patch level on Qualcomm Snapdragon Automobile, Snapdragon Mobile, and…
• CVE-2014-9985 — Critical (CVSS 9.8): In Android before 2018-04-05 or earlier security patch level on Qualcomm Snapdragon Mobile MDM9635M, SD 400, and SD…
• CVE-2014-9826 — Critical (CVSS 9.8): ImageMagick allows remote attackers to have unspecified impact via vectors related to error handling in sun files.

Browse all CWE-388 vulnerabilities →