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CVE-2021-33632

TOCTOU Race Condition problem in iSulad

7.0 HighFix available

Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in openEuler iSulad on Linux allows Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions. This vulnerability is associated with program files https://gitee.Com/openeuler/iSulad/blob/master/src/cmd/isulad/main.C.

This issue affects iSulad: 2.0.18-13, from 2.1.4-1 through 2.1.4-2.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
High
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

0.15%Up 0.1 points since Mar 25, 2024
90%50%10%1%

What each source reports

CVE List Score used 7.0

TOCTOU Race Condition problem in iSulad

Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in openEuler iSulad on Linux allows Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions. This vulnerability is associated with program files https://gitee.Com/openeuler/iSulad/blob/master/src/cmd/isulad/main.C.

This issue affects iSulad: 2.0.18-13, from 2.1.4-1 through 2.1.4-2.

Record
CVE-2021-33632
CVSS 3.1
7.0 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-367
Updated
2026-11-02
EUVDEUVD-2021-20309 7.0

Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in openEuler iSulad on Linux allows Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions. This vulnerability is associated with program files https://gitee.Com/openeuler/iSulad/blob/master/src/cmd/isulad/main.C.

This issue affects iSulad: 2.0.18-13, from 2.1.4-1 through 2.1.4-2.

Record
EUVD-2021-20309
CVSS 3.1
7.0 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-03
GitHub AdvisoriesGHSA-mrfq-6jmf-4q53 7.0

Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in openEuler iSulad on Linux...

Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in openEuler iSulad on Linux allows Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions. This vulnerability is associated with program files https://gitee.Com/openeuler/iSulad/blob/master/src/cmd/isulad/main.C.

This issue affects iSulad: 2.0.18-13, from 2.1.4-1 through 2.1.4-2.

Record
GHSA-mrfq-6jmf-4q53
CVSS 3.1
7.0 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-367
Updated
2026-11-02
NVD 7.0

Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in openEuler iSulad on Linux allows Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions. This vulnerability is associated with program files https://gitee.Com/openeuler/iSulad/blob/master/src/cmd/isulad/main.C.

This issue affects iSulad: 2.0.18-13, from 2.1.4-1 through 2.1.4-2.

Record
CVE-2021-33632
CVSS 3.1
7.0 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-367
Updated
2026-11-02
OSVOESA-2024-1287 7.0

iSulad security update

This is a umbrella project for gRPC-services based Lightweight Container Runtime Daemon, written by C.

Security Fix(es):

在isulad服务初始化阶段，会进行临时文件的正确性检查，如果检查不通过则重新创建文件，在检查与创建之间，存在一个条件竞争问题，攻击者可以通过利用该漏洞进行提权。(CVE-2021-33632)

Record
OESA-2024-1287
CVSS 3.1
7.0 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVOESA-2024-1289 7.0

iSulad security update

This is a umbrella project for gRPC-services based Lightweight Container Runtime Daemon, written by C.

Security Fix(es):

在isulad服务初始化阶段，会进行临时文件的正确性检查，如果检查不通过则重新创建文件，在检查与创建之间，存在一个条件竞争问题，攻击者可以通过利用该漏洞进行提权。(CVE-2021-33632)

Record
OESA-2024-1289
CVSS 3.1
7.0 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVOESA-2024-1290 7.0

iSulad security update

This is a umbrella project for gRPC-services based Lightweight Container Runtime Daemon, written by C.

Security Fix(es):

在isulad服务初始化阶段，会进行临时文件的正确性检查，如果检查不通过则重新创建文件，在检查与创建之间，存在一个条件竞争问题，攻击者可以通过利用该漏洞进行提权。(CVE-2021-33632)

Record
OESA-2024-1290
CVSS 3.1
7.0 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVOESA-2024-1307 7.0

iSulad security update

This is a umbrella project for gRPC-services based Lightweight Container Runtime Daemon, written by C.

Security Fix(es):

在isulad服务初始化阶段，会进行临时文件的正确性检查，如果检查不通过则重新创建文件，在检查与创建之间，存在一个条件竞争问题，攻击者可以通过利用该漏洞进行提权。(CVE-2021-33632)

Record
OESA-2024-1307
CVSS 3.1
7.0 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
iSulad
openEuler:22.03-LTS
 before 2.0.18-16.oe2203
2.0.18-16.oe2203
iSulad
openEuler:22.03-LTS-SP2
 before 2.1.5-1.oe2203sp2
2.1.5-1.oe2203sp2
iSulad
openEuler:22.03-LTS-SP1
 before 2.0.18-16.oe2203sp1
2.0.18-16.oe2203sp1
iSulad
openEuler:20.03-LTS-SP4
 before 2.0.18-17.oe2003sp4
2.0.18-17.oe2003sp4

History

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

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

In short

CVE-2021-33632 is a high vulnerability (CVSS 7.0) in Openeuler Isula, published March 15, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.15%, the 3rd percentile. Fixed in iSulad 2.0.18-16.oe2203.

References

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