CVE-2022-4318

Privilege escalation via newline-injected HOME value

Published Sep 25, 2023 · Updated Aug 3, 2024

CRI-O in OpenShift Container Platform 4.11 and 4.12 allows local users to gain root privileges via a crafted HOME variable. During container creation, setupContainerUser passes the HOME value into GeneratePasswd without rejecting line breaks, so attacker-controlled text becomes an extra /etc/passwd record. Exploitation requires permission to create a pod under a non-default security context constraint such as anyuid; the default constraint blocks the privilege-escalation path.

CVSS severity7.8
High
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CRI-O in OpenShift Container Platform 4.11 and 4.12 allows local users to gain root privileges via a crafted HOME variable. During container creation, setupContainerUser passes the HOME value into GeneratePasswd without rejecting line breaks, so attacker-controlled text becomes an extra /etc/passwd record. Exploitation requires permission to create a pod under a non-default security context constraint such as anyuid; the default constraint blocks the privilege-escalation path.

The record

CVE
CVE-2022-4318
Published
Sep 25, 2023
Updated
Aug 3, 2024
Vendor
389 Directory Server
Product
Red Hat OpenShift Container Platform 4.11
Classifications
CWE-538, CWE-913, T1611
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 25, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

389 Directory Server · Red Hat OpenShift Container Platform 4.11Affected versions are unavailable in this record.
Red Hat · Red Hat OpenShift Container Platform 4.12Affected versions are unavailable in this record.

Published CVSS scores

6.1GitHub Security AdvisoryCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:H/A:N
7.8Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-538Insertion of Sensitive Information into Externally-Accessible File or Directory
CWE-913Improper Control of Dynamically-Managed Code Resources
T1611Escape to Host

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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