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CVE-2021-33637

Export container in a malicious directory may cause process to be hijacked

8.4 High

When the isula export command is used to export a container to an image and the container is controlled by an attacker, the attacker can escape the container.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

0.21%Up 0.2 points since Oct 29, 2023
90%50%10%1%

What each source reports

CVE List Score used 8.4

Export container in a malicious directory may cause process to be hijacked

When the isula export command is used to export a container to an image and the container is controlled by an attacker, the attacker can escape the container.

Record
CVE-2021-33637
CVSS 3.1
8.4 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-665
Updated
2026-11-02
EUVDEUVD-2021-20314 8.4

When the isula export command is used to export a container to an image and the container is controlled by an attacker, the attacker can escape the container.

Record
EUVD-2021-20314
CVSS 3.1
8.4 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-03
GitHub AdvisoriesGHSA-2jw2-fcpf-pj3x 8.4

When the isula export command is used to export a container to an image and the container is...

When the isula export command is used to export a container to an image and the container is controlled by an attacker, the attacker can escape the container.

Record
GHSA-2jw2-fcpf-pj3x
CVSS 3.1
8.4 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-665
Updated
2026-11-02
NVD 8.4

When the isula export command is used to export a container to an image and the container is controlled by an attacker, the attacker can escape the container.

Record
CVE-2021-33637
CVSS 3.1
8.4 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1
6.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N
Weakness
CWE-665
Updated
2026-11-02
OSVOESA-2023-1686 9.8

iSulad security update

Security Fix(es):

When malicious images are pulled by isula pull, attackers can execute arbitrary code.(CVE-2021-33635)

When the isula load command is used to load malicious images, attackers can execute arbitrary code.(CVE-2021-33636)

When the isula export command is used to export a container to an image and the container is controlled by an attacker, the attacker can escape the container.(CVE-2021-33637)

When the isula cp command is used to copy files from a container to a host machine and the container is controlled by an attacker, the attacker can escape the container.(CVE-2021-33638)

Record
OESA-2023-1686
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
iSulad
openEuler:20.03-LTS-SP1
From an advisory covering 4 CVEs
 before 2.0.8-20230216.115408.git40ea936a.oe1
2.0.8-20230216.115408.git40ea936a.oe1
iSulad
openEuler:20.03-LTS-SP3
From an advisory covering 4 CVEs
 before 2.0.18-13.oe1
2.0.18-13.oe1
iSulad
openEuler:22.03-LTS
From an advisory covering 4 CVEs
 before 2.1.3-6.oe2203sp2
2.1.3-6.oe2203sp2
iSulad
openEuler:22.03-LTS-SP1
From an advisory covering 4 CVEs
 before 2.0.18-13.oe2203sp1
2.0.18-13.oe2203sp1
iSulad
openEuler:22.03-LTS-SP2
From an advisory covering 4 CVEs
 before 2.1.3-6.oe2203sp2
2.1.3-6.oe2203sp2

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-33637 is a high vulnerability (CVSS 8.4) in Openeuler Isula, published September 28, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.21%, the 12th percentile. No source names a fixed version.

References

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