CVE-2021-20314
CRITICALCVSS 9.8/10EPSS 2.81%
Last modified
CVE-2021-20314 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Stack buffer overflow in libspf2 versions below 1.2.11 when processing certain SPF macros can lead to Denial of service and potentially code execution via malicious crafted SPF explanation messages.. EPSS estimates a 2.81% chance of exploitation in the next 30 days.
Description
Stack buffer overflow in libspf2 versions below 1.2.11 when processing certain SPF macros can lead to Denial of service and potentially code execution via malicious crafted SPF explanation messages.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Libspf2 | Libspf2 | < 1.2.11 |
| Redhat | Enterprise Linux | 7.0 |
| Fedoraproject | Fedora | 33 |
| Fedoraproject | Fedora | 34 |
| Fedoraproject | Fedora | 35 |
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1993070Issue Tracking, Patch, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1993070Issue Tracking, Patch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-20314?
Stack buffer overflow in libspf2 versions below 1.2.11 when processing certain SPF macros can lead to Denial of service and potentially code execution via malicious crafted SPF explanation messages.
How severe is CVE-2021-20314?
CVE-2021-20314 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.81% probability of exploitation in the next 30 days.
How do I fix CVE-2021-20314?
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-2021-20314?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST