CVE-2021-3602

Local secret disclosure via inherited chroot environments

Published Mar 3, 2022 · Updated Aug 3, 2024

Information disclosure in affected Buildah releases allows local users to read parent-process environment variables during chroot builds. The chroot/run.go launcher copied the entire Buildah environment into intermediate unshare commands instead of passing only its logging setting. Exploitation requires a process started by a RUN instruction or buildah run under chroot isolation; exposed values can include CI/CD registry credentials.

CVSS severity5.5
Medium
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in affected Buildah releases allows local users to read parent-process environment variables during chroot builds. The chroot/run.go launcher copied the entire Buildah environment into intermediate unshare commands instead of passing only its logging setting. Exploitation requires a process started by a RUN instruction or buildah run under chroot isolation; exposed values can include CI/CD registry credentials.

The record

CVE
CVE-2021-3602
Published
Mar 3, 2022
Updated
Aug 3, 2024
Vendor
Containers
Product
Buildah
Classifications
CWE-212, CWE-200, T1552
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Mar 3, 2022CVE 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

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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=Affects v1.21.2, v1.20.0, v1.19.8, v1.18.0, v1.17.1, v1.16.7, Fixed in v1.21.3, v1.19.9, v1.17.2, v1.16.8, v1.22.0 and above.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Containers · Buildahversion=Affects v1.21.2, v1.20.0, v1.19.8, v1.18.0, v1.17.1, v1.16.7, Fixed in v1.21.3, v1.19.9, v1.17.2, v1.16.8, v1.22.0 and above.

Published CVSS scores

1.9NIST NVDAV:L/AC:M/Au:N/C:P/I:N/A:N
5.5UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-212Improper Removal of Sensitive Information Before Storage or Transfer
CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1552Unsecured Credentials

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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