CVE-2021-23240

Public Exploit

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.

Category

7.8
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.22%
Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory gentoo.org Vendor Advisory sudo.ws
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://bugzilla.suse.com/show_bug.cgi?id=CVE-2021-23240 issue tracking patch exploit third party advisory
https://www.sudo.ws/stable.html#1.9.5 release notes vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EE42Y35SMJOLONAIBNYNFC7J44UUZ2Y6/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GMY4VSSBIND7VAYSN6T7XIWJRWG4GBB3/ vendor advisory
https://security.gentoo.org/glsa/202101-33 third party advisory vendor advisory
https://security.netapp.com/advisory/ntap-20210129-0010/ third party advisory
https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E mailing list
https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E mailing list

Frequently Asked Questions

What is the severity of CVE-2021-23240?
CVE-2021-23240 has been scored as a high severity vulnerability.
How to fix CVE-2021-23240?
To fix CVE-2021-23240, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-23240 being actively exploited in the wild?
It is possible that CVE-2021-23240 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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