CVE-2022-39238Network attack vector

Disabled-account access via omitted PAM authorization check

Published Sep 23, 2022 · Updated Apr 23, 2025

Improper authentication in Arvados 2.4.2 and earlier allows remote authenticated users with disabled PAM accounts to obtain access. The PAM login path validates supplied credentials but fails to check whether PAM permits the account to access the controller host before issuing an Arvados API token. The flaw is reachable only when PAM is the configured identity provider; LDAP and OpenID Connect deployments are unaffected, and accepted accounts gain their configured Arvados access.

CVSS severity8.8
High
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in Arvados 2.4.2 and earlier allows remote authenticated users with disabled PAM accounts to obtain access. The PAM login path validates supplied credentials but fails to check whether PAM permits the account to access the controller host before issuing an Arvados API token. The flaw is reachable only when PAM is the configured identity provider; LDAP and OpenID Connect deployments are unaffected, and accepted accounts gain their configured Arvados access.

The record

CVE
CVE-2022-39238
Published
Sep 23, 2022
Updated
Apr 23, 2025
Vendor
Arvados
Product
Arvados
Classifications
CWE-287, T1078
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 23, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.4.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Arvados · Arvadosversion=< 2.4.3

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/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.

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No observations available

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

Weakness, pattern, technique

CWE-287Improper Authentication
T1078Valid Accounts

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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