CVE-2021-23240

mediumpriority · track · 31EPSS 0.011 · 65 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.08% (65th) EPSS

CVSS 4.4 · medium

Is it mine?

24 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-27

selinux_edit_copy_tfiles in sudoedit in Sudo before 1.9.5 allows a local unprivileged user to gain file ownership and escalate privileges by replacing a temporary file with a symlink to an arbitrary file target. This affects SELinux RBAC support in permissive mode. Machines without SELinux are not vulnerable.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

Fixedsudo-0:1.8.29-7.el8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2021:1723
Fixedsudo-0:1.8.29-7.el8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2021:1723
Fixedsudo-0:1.8.29-7.el8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2021:1723
Fixedsudo-0:1.8.29-7.el8.src as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2021:1723
Fixedsudo-0:1.8.29-7.el8.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2021:1723
Fixedsudo-debuginfo-0:1.8.29-7.el8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2021:1723
Fixedsudo-debuginfo-0:1.8.29-7.el8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2021:1723
Fixedsudo-debuginfo-0:1.8.29-7.el8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2021:1723
Fixedsudo-debuginfo-0:1.8.29-7.el8.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2021:1723
Fixedsudo-debugsource-0:1.8.29-7.el8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2021:1723
Fixedsudo-debugsource-0:1.8.29-7.el8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2021:1723
Fixedsudo-debugsource-0:1.8.29-7.el8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2021:1723
Fixedsudo-debugsource-0:1.8.29-7.el8.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2021:1723
Workaroundsudo-0:1.8.29-7.el8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
* Enable SELinux in enforcing mode. * Enable the symbolic link protection (/proc/sys/fs/protected_symlinks set to 1). * Remove the `sesh` binary (/usr/libexec/sudo/sesh or /usr/lib/sudo/sesh) if SELinux RBAC support is not needed.
Workaroundsudo-0:1.8.29-7.el8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
* Enable SELinux in enforcing mode. * Enable the symbolic link protection (/proc/sys/fs/protected_symlinks set to 1). * Remove the `sesh` binary (/usr/libexec/sudo/sesh or /usr/lib/sudo/sesh) if SELinux RBAC support is not needed.
Workaroundsudo-0:1.8.29-7.el8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
* Enable SELinux in enforcing mode. * Enable the symbolic link protection (/proc/sys/fs/protected_symlinks set to 1). * Remove the `sesh` binary (/usr/libexec/sudo/sesh or /usr/lib/sudo/sesh) if SELinux RBAC support is not needed.
Workaroundsudo-0:1.8.29-7.el8.src as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
* Enable SELinux in enforcing mode. * Enable the symbolic link protection (/proc/sys/fs/protected_symlinks set to 1). * Remove the `sesh` binary (/usr/libexec/sudo/sesh or /usr/lib/sudo/sesh) if SELinux RBAC support is not needed.
Workaroundsudo-0:1.8.29-7.el8.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
* Enable SELinux in enforcing mode. * Enable the symbolic link protection (/proc/sys/fs/protected_symlinks set to 1). * Remove the `sesh` binary (/usr/libexec/sudo/sesh or /usr/lib/sudo/sesh) if SELinux RBAC support is not needed.
Workaroundsudo-debuginfo-0:1.8.29-7.el8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
* Enable SELinux in enforcing mode. * Enable the symbolic link protection (/proc/sys/fs/protected_symlinks set to 1). * Remove the `sesh` binary (/usr/libexec/sudo/sesh or /usr/lib/sudo/sesh) if SELinux RBAC support is not needed.
Workaroundsudo-debuginfo-0:1.8.29-7.el8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
* Enable SELinux in enforcing mode. * Enable the symbolic link protection (/proc/sys/fs/protected_symlinks set to 1). * Remove the `sesh` binary (/usr/libexec/sudo/sesh or /usr/lib/sudo/sesh) if SELinux RBAC support is not needed.
Workaroundsudo-debuginfo-0:1.8.29-7.el8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
* Enable SELinux in enforcing mode. * Enable the symbolic link protection (/proc/sys/fs/protected_symlinks set to 1). * Remove the `sesh` binary (/usr/libexec/sudo/sesh or /usr/lib/sudo/sesh) if SELinux RBAC support is not needed.
Workaroundsudo-debuginfo-0:1.8.29-7.el8.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
* Enable SELinux in enforcing mode. * Enable the symbolic link protection (/proc/sys/fs/protected_symlinks set to 1). * Remove the `sesh` binary (/usr/libexec/sudo/sesh or /usr/lib/sudo/sesh) if SELinux RBAC support is not needed.
Workaroundsudo-debugsource-0:1.8.29-7.el8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
* Enable SELinux in enforcing mode. * Enable the symbolic link protection (/proc/sys/fs/protected_symlinks set to 1). * Remove the `sesh` binary (/usr/libexec/sudo/sesh or /usr/lib/sudo/sesh) if SELinux RBAC support is not needed.
Workaroundsudo-debugsource-0:1.8.29-7.el8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
* Enable SELinux in enforcing mode. * Enable the symbolic link protection (/proc/sys/fs/protected_symlinks set to 1). * Remove the `sesh` binary (/usr/libexec/sudo/sesh or /usr/lib/sudo/sesh) if SELinux RBAC support is not needed.
Workaroundsudo-debugsource-0:1.8.29-7.el8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
* Enable SELinux in enforcing mode. * Enable the symbolic link protection (/proc/sys/fs/protected_symlinks set to 1). * Remove the `sesh` binary (/usr/libexec/sudo/sesh or /usr/lib/sudo/sesh) if SELinux RBAC support is not needed.
Workaroundsudo-debugsource-0:1.8.29-7.el8.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
* Enable SELinux in enforcing mode. * Enable the symbolic link protection (/proc/sys/fs/protected_symlinks set to 1). * Remove the `sesh` binary (/usr/libexec/sudo/sesh or /usr/lib/sudo/sesh) if SELinux RBAC support is not needed.

cvss

Technical severity, 0–10. One row per scoring source.

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.4–7.8

v2.04.4mediumAV:L/AC:M/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 3.4 · impact 6.4

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 5.9

v3.17.1highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · Red Hat Product Security US

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-59USprimaryCWE-367US

affected products (24)

Products and version ranges known to be affected.

IBM InfoSphere Information Serverall versionscert_bundDEcpe:/a:ibm:infosphere_information_server:-
IBM QRadar SIEM 7.3all versionscert_bundDEcpe:/a:ibm:qradar_siem:7.3
IBM QRadar SIEM 7.4all versionscert_bundDEcpe:/a:ibm:qradar_siem:7.4
IBM QRadar SIEM 7.5.0all versionscert_bundDEcpe:/a:ibm:qradar_siem:7.5.0
n/a n/a≤ n/aenisa_euvdEU
fedoraproject fedora= 32nvdUScpe:2.3:o:fedoraproject:fedora:*:*:*:*:*:*:*:*
fedoraproject fedora= 33nvdUScpe:2.3:o:fedoraproject:fedora:*:*:*:*:*:*:*:*
netapp hci management nodeall versionsnvdUScpe:2.3:a:netapp:hci_management_node:*:*:*:*:*:*:*:*
netapp solidfireall versionsnvdUScpe:2.3:a:netapp:solidfire:*:*:*:*:*:*:*:*
sudo project sudo< 1.8.32nvdUScpe:2.3:a:sudo_project:sudo:*:*:*:*:*:*:*:*
sudo project sudo1.9.0 → 1.9.5nvdUScpe:2.3:a:sudo_project:sudo:*:*:*:*:*:*:*:*
sudo-0:1.8.29-7.el8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)all versionsfixedredhat_csafUS
sudo-0:1.8.29-7.el8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)all versionsfixedredhat_csafUS
sudo-0:1.8.29-7.el8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8)all versionsfixedredhat_csafUS
sudo-0:1.8.29-7.el8.src as a component of Red Hat Enterprise Linux BaseOS (v. 8)all versionsfixedredhat_csafUS
sudo-0:1.8.29-7.el8.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)all versionsfixedredhat_csafUS
sudo-debuginfo-0:1.8.29-7.el8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)all versionsfixedredhat_csafUS
sudo-debuginfo-0:1.8.29-7.el8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)all versionsfixedredhat_csafUS
sudo-debuginfo-0:1.8.29-7.el8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8)all versionsfixedredhat_csafUS
sudo-debuginfo-0:1.8.29-7.el8.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)all versionsfixedredhat_csafUS

showing 20 of 24

advisories (2)

Vendor and ecosystem advisories describing this.

RHSA-2021:1723Red Hat Security Advisory: sudo security and bug fix update2021-05-18csaf · redhat_csafUS
An update for sudo is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Low. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
WID-SEC-W-2025-0227IBM QRadar SIEM: Mehrere SchwachstellenDeutsch2021-11-30csaf · cert_bundDE
Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in IBM QRadar SIEM ausnutzen, um seine Privilegien zu erweitern, Administratorrechte zu erlangen, beliebigen Programmcode auszuführen, Informationen offenzulegen, Dateien zu manipulieren oder Sicherheitsvorkehrungen zu umgehen.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd redhat_csaf NVD CVE.org MITRE

published 2021-01-12modified 2026-06-17

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references (38)

External citations — patches, advisories, analysis.

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