CVE-2021-27216
MEDIUMCVSS 6.3/10EPSS 0.98%
Last modified
CVE-2021-27216 is a medium-severity vulnerability rated 6.3/10 on the CVSS scale. Exim 4 before 4.94.2 has Execution with Unnecessary Privileges. By leveraging a delete_pid_file race condition, a local user can delete arbitrary files as root. EPSS estimates a 0.98% chance of exploitation in the next 30 days.
Description
Exim 4 before 4.94.2 has Execution with Unnecessary Privileges. By leveraging a delete_pid_file race condition, a local user can delete arbitrary files as root. This involves the -oP and -oPX options.
Metrics
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Exim | Exim | < 4.94.2 |
References
- https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28007-LFDIR.txtExploit, Vendor Advisory
- https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28007-LFDIR.txtExploit, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-27216?
Exim 4 before 4.94.2 has Execution with Unnecessary Privileges. By leveraging a delete_pid_file race condition, a local user can delete arbitrary files as root. This involves the -oP and -oPX options.
How severe is CVE-2021-27216?
CVE-2021-27216 has a CVSS score of 6.3/10 (MEDIUM severity). The EPSS model estimates a 0.98% probability of exploitation in the next 30 days.
How do I fix CVE-2021-27216?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2021-27216?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST