Security Bulletin
Summary
This interim fix provides instructions on upgrading Apache Tomcat to v8.5.57 in IBM Platform Symphony 7.1 Fix Pack 1 in order to address security vulnerabilities CVE-2020-9484, CVE-2020-11996, CVE-2020-13934, and CVE-2020-13935 in Apache Tomcat.
Vulnerability Details
CVEID: CVE-2020-13934
DESCRIPTION: Apache Tomcat is vulnerable to a denial of service, caused by not releasing the HTTP/1.1 processor after the upgrade to HTTP/2 in an h2c direct connection. By sending specially-crafted requests, a remote attacker could exploit this vulnerability to cause OutOfMemoryException resulting in a denial of service.
CVSS Base score: 5.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/185239 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
CVEID: CVE-2020-11996
DESCRIPTION: Apache Tomcat is vulnerable to a denial of service. By sending a specially crafted sequence of HTTP/2 requests, a remote attacker could exploit this vulnerability to trigger high CPU
usage for several seconds.
CVSS Base score: 5.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/184012 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
CVEID: CVE-2020-13935
DESCRIPTION: Apache Tomcat is vulnerable to a denial of service, caused by improper validation of the payload length in a WebSocket frame. By sending multiple requests with invalid payload lengths, a remote attacker could exploit this vulnerability to cause the application to enter into an infinite loop.
CVSS Base score: 5.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/185227 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
CVEID: CVE-2020-9484
DESCRIPTION: Apache Tomcat could allow a remote authenticated attacker to execute arbitrary code on the system, caused by an unsafe deserialization when the server is configured to use the PersistenceManager with a FileStore. By sending specially-crafted input, an attacker could exploit this vulnerability to execute arbitrary code on the system.
CVSS Base score: 8.8
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/182231 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Affected Products and Versions
| Affected Product(s) | Version(s) |
| IBM Platform Symphony | 7.1 Fix Pack 1 |
Remediation/Fixes
| Products | VRMF | APAR | Remediation/First Fix |
| IBM Platform Symphony | 7.1 Fix Pack 1 | P103812 | sym-7.1-build555696 |
Workarounds and Mitigations
None
Get Notified about Future Security Bulletins
References
Change History
28 Jul 2020: Initial Publication
*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.
Disclaimer
Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.
Document Location
Worldwide
Was this topic helpful?
Document Information
More support for:
Platform Symphony
Software version:
7.1 Fix Pack 1
Operating system(s):
Linux
Document number:
6260565
Modified date:
17 August 2020
UID
ibm16260565