CVE-2020-7455

Name: CVE-2020-7455
Creator: NVD / NIST
Published: 2020-05-13T16:15:13.12+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.52%

Last modified Jun 17, 2026

CVE-2020-7455 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. In FreeBSD 12.1-STABLE before r360973, 12.1-RELEASE before p5, 11.4-STABLE before r360973, 11.4-BETA1 before p1 and 11.3-RELEASE before p9, the FTP packet handler in libalias incorrectly calculates some packet length allowing disclosure of small amounts of kernel (for kernel NAT) or natd process space (for userspace natd).. EPSS estimates a 0.52% chance of exploitation in the next 30 days.

Description

In FreeBSD 12.1-STABLE before r360973, 12.1-RELEASE before p5, 11.4-STABLE before r360973, 11.4-BETA1 before p1 and 11.3-RELEASE before p9, the FTP packet handler in libalias incorrectly calculates some packet length allowing disclosure of small amounts of kernel (for kernel NAT) or natd process space (for userspace natd).

Metrics

CVSS 3.1

5.5/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

0.52%

40.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-772

Affected Software

Vendor	Product	Versions
Freebsd	Freebsd	11.3
Freebsd	Freebsd	11.4
Freebsd	Freebsd	12.1

References

https://security.FreeBSD.org/advisories/FreeBSD-SA-20:13.libalias.ascVendor Advisory
https://security.netapp.com/advisory/ntap-20200518-0005/Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-20-661/Third Party Advisory, VDB Entry
https://security.FreeBSD.org/advisories/FreeBSD-SA-20:13.libalias.ascVendor Advisory
https://security.netapp.com/advisory/ntap-20200518-0005/Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-20-661/Third Party Advisory, VDB Entry

Timeline

Published: May 13, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-7455?

How severe is CVE-2020-7455?

CVE-2020-7455 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.52% probability of exploitation in the next 30 days.

How do I fix CVE-2020-7455?

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-2020-7455?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST