QID 356300

Date Published: 2023-09-28

QID 356300: Amazon Linux Security Advisory for tomcat : ALASTOMCAT8.5-2023-009

A deserialization flaw was discovered in apache tomcat's use of a filestore.
Under specific circumstances, an attacker can use a specially crafted request to trigger remote code execution through deserialization of the file under their control.
The highest threat from the vulnerability is to data confidentiality and integrity as well as system availability. (
( CVE-2020-9484) a flaw was found in apache tomcat.
When responding to new h2c connection requests, apache tomcat could duplicate request headers and a limited amount of request body from one request to another meaning user a and user b could both see the results of user a's request.
The highest threat from this vulnerability is to data confidentiality. (
( CVE-2021-25122) the fix for( CVE-2020-9484 was incomplete.
When using apache tomcat 10.0.0-m1 to 10.0.0, 9.0.0.m1 to 9.0.41, 8.5.0 to 8.5.61 or 7.0.0.
To 7.0.107 with a configuration edge case that was highly unlikely to be used, the tomcat instance was still vulnerable to( CVE-2020-9494.
Note that both the previously published prerequisites for( CVE-2020-9484 and the previously published mitigations for( CVE-2020-9484 also apply to this issue. (
( CVE-2021-25329)



Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

Successful exploitation of this vulnerability could lead to a securitybreach or could affect integrity, availability, and confidentiality.

  • CVSS V3 rated as High - 7.5 severity.
  • CVSS V2 rated as Medium - 5 severity.
    • Solution
    Please refer to Amazon advisory: ALASTOMCAT8.5-2023-009 for affected packages and patching details, or update with your package manager.
    Vendor References

    CVEs related to QID 356300

    CVE-2020-9484 | CVE-2021-25122 | CVE-2021-25329 |
    Software Advisories
    Advisory ID Software Component Link
    ALASTOMCAT8.5-2023-009 amazon linux 2 URL Logo alas.aws.amazon.com/AL2/ALASTOMCAT8.5-2023-009.html
    By selecting these links, you may be leaving CVEreport webspace. We have provided these links to other websites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other websites that are more appropriate for your purpose. CVEreport does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, CVEreport does not endorse any commercial products that may be mentioned on these sites. Please address comments about any linked pages to [email protected].