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Security Bulletin: Vulnerability in Flask and Python affects IBM Spectrum Protect Plus Microsoft File Systems Backup and Restore (CVE-2021-33026, CVE-2022-0391)

Security Bulletin


Elevation of privileges vulnerability in Flask and weaker than expected security in Python can affect IBM Spectrum Protect Plus Microsoft® File Systems backup and restore.

Vulnerability Details

CVEID:   CVE-2021-33026
DESCRIPTION:   Flask-Caching extension for Flask could allow a local lauthenticated attacker to gain elevated privileges on the system, caused by an unsafe deserialization flaw in Pickle. By sending a specially-crested payload, an authenticated attacker could exploit this vulnerability to gain elevated privileges to poison the cache, and execute Python code.
CVSS Base score: 7.8
CVSS Temporal Score: See: for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)

CVEID:   CVE-2022-0391
DESCRIPTION:   Python could provide weaker than expected security, cause by a improper input validation by the urllib.parse module. By sending a specially-crafted request using \r and \n characters in the URL path. An attacker could exploit this vulnerability to perform injection attack or launch further attacks on the system.
CVSS Base score: 5.3
CVSS Temporal Score: See: for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)

Affected Products and Versions

Affected Product(s)Version(s)
IBM Spectrum Protect Plus File Systems Agent10.1.6.0-


BM Spectrum Protect
Plus Affected Versions
PlatformLink to Fix and Instructions


Workarounds and Mitigations


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Change History

11 March 2022: 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.


Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

Document Location


[{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSNQFQ","label":"IBM Spectrum Protect Plus"},"Component":"","Platform":[{"code":"PF033","label":"Windows"}],"Version":"10.1","Edition":"","Line of Business":{"code":"LOB26","label":"Storage"}}]

Document Information

Modified date:
11 March 2022