Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Sudo Project | Sudo | < 1.8.32 |
| Netapp | Hci Management Node | - |
| Netapp | Solidfire | - |
| Fedoraproject | Fedora | 32 |
Related Weaknesses (CWE)
References
- https://bugzilla.suse.com/show_bug.cgi?id=CVE-2021-23240ExploitIssue TrackingPatch
- https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e3
- https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.gentoo.org/glsa/202101-33Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210129-0010/Third Party Advisory
- https://www.sudo.ws/stable.html#1.9.5Release NotesVendor Advisory
- https://bugzilla.suse.com/show_bug.cgi?id=CVE-2021-23240ExploitIssue TrackingPatch
- https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e3
- https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.gentoo.org/glsa/202101-33Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210129-0010/Third Party Advisory
FAQ
What is CVE-2021-23240?
CVE-2021-23240 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 f...
How severe is CVE-2021-23240?
CVE-2021-23240 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-23240?
Check the references section above for vendor advisories and patch information. Affected products include: Sudo Project Sudo, Netapp Hci Management Node, Netapp Solidfire, Fedoraproject Fedora.