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CVE-2021-23240

HIGH
7.8
CVSS Score
Published: January 12, 2021 at 08:17 AM UTC
Updated: June 17, 2026 at 03:38 AM UTC
4 products affected across 3 vendorsFedoraSolidfireHci Management Node

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Severity
HIGH7.8
Exploit prediction
EPSS 1%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Fedora· Fedora Projectrpm
95%
3233
Hci Management Node· NetApp
95%
All versions
Solidfire· NetApp
95%
All versions
Sudo· Sudo Project
95%
v < 1.8.321.9.0 ≤ v < 1.9.5
Affected range stops below 1.8.32, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.9.5, so it looks safe — our inference, not a vendor statement

References (8)

x_refsource_MISCExploitIssue TrackingPatchThird Party Advisory
Source: [email protected]
https://bugzilla.suse.com/show_bug.cgi?id=CVE-2021-23240
Mailing Listx_refsource_MLIST
Source: [email protected]
https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
Mailing Listx_refsource_MLIST
Source: [email protected]
https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EE42Y35SMJOLONAIBNYNFC7J44UUZ2Y6/
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GMY4VSSBIND7VAYSN6T7XIWJRWG4GBB3/
Vendor Advisoryx_refsource_GENTOOThird Party Advisory
Source: [email protected]
https://security.gentoo.org/glsa/202101-33
x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://security.netapp.com/advisory/ntap-20210129-0010/
x_refsource_CONFIRMRelease NotesVendor Advisory
Source: [email protected]
https://www.sudo.ws/stable.html#1.9.5

CVSS

7.8HIGH[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-59

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