CVE-2020-28371

Name: CVE-2020-28371
Creator: NVD / NIST
Published: 2020-11-09T22:15:13.333+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.71%

Last modified Jun 17, 2026

CVE-2020-28371 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An issue was discovered in ReadyTalk Avian 1.2.0 before 2020-10-27. The FileOutputStream.write() method in FileOutputStream.java has a boundary check to prevent out-of-bounds memory read/write operations. EPSS estimates a 1.71% chance of exploitation in the next 30 days.

Description

An issue was discovered in ReadyTalk Avian 1.2.0 before 2020-10-27. The FileOutputStream.write() method in FileOutputStream.java has a boundary check to prevent out-of-bounds memory read/write operations. However, an integer overflow leads to bypassing this check and achieving the out-of-bounds access. NOTE: This vulnerability only affects products that are no longer supported by the maintainer

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

1.71%

74.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Readytalk	Avian	1.2.0

References

https://github.com/ReadyTalk/avian/commit/0871979b298add320ca63f65060acb7532c8a0ddPatch, Third Party Advisory
https://github.com/ReadyTalk/avian/pull/572Patch, Third Party Advisory
https://github.com/ReadyTalk/avian/commit/0871979b298add320ca63f65060acb7532c8a0ddPatch, Third Party Advisory
https://github.com/ReadyTalk/avian/pull/572Patch, Third Party Advisory

Timeline

Published: Nov 9, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-28371?

How severe is CVE-2020-28371?

CVE-2020-28371 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.71% probability of exploitation in the next 30 days.

How do I fix CVE-2020-28371?

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-2020-28371?

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

Scan your code now

Source: NVD / NIST