QID 352262

Date Published: 2021-04-08

QID 352262: Amazon Linux Security Advisory for tomcat7: ALAS-2021-1493

<DIV> Issue Overview:

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 )

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 )

</DIV>

Allows unauthorized disclosure of information; allows unauthorized modification; allows disruption of service.

  • CVSS V3 rated as High - 7 severity.
  • CVSS V2 rated as Medium - 4.4 severity.
    • Solution
    Please refer to Amazon advisory ALAS-2021-1493 for affected packages and patching details, or update with your package manager.
    Vendor References

    CVEs related to QID 352262

    CVE-2020-9484 | CVE-2021-25329 |
    Software Advisories
    Advisory ID Software Component Link
    ALAS-2021-1493 Amazon Linux tomcat7 (7.0.108-1.40.amzn1) on noarch URL Logo alas.aws.amazon.com/ALAS-2021-1493.html
    ALAS-2021-1493 Amazon Linux tomcat7 (7.0.108-1.40.amzn1) on src URL Logo alas.aws.amazon.com/ALAS-2021-1493.html
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