IBM Security Bulletin: Vulnerabilities in Python, Tornado, and Urllib3

Security bulletin from IBM Corp.

Summary
Spectrum Protect Plus Microsoft File Systems backup and restore may be affected by vulnerabilities in Python, Tornado. and Urllib3 such as server-side request forgery, HTTP response splitting, buffer overflow, and man-in-the-middle attacks.

Vulnerability details
CVEID:   CVE-2021-29921
DESCRIPTION:   Python is vulnerable to server-side request forgery, caused by improper input validation of octal strings in the stdlib ipaddress. By submitting a specially-crafted IP address to a web application, an attacker could exploit this vulnerability to conduct SSRF or local file include attacks.
CVSS Base score: 9.1
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/201083 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N)

CVEID:   CVE-2021-28363
DESCRIPTION:   urllib3 for python is vulnerable to a man-in-the-middle attack, caused by improper certificate validation in some cases involving HTTPS to HTTPS proxies. An attacker could exploit this vulnerability to launch a man-in-the-middle attack and gain access to the communication channel between endpoints to obtain sensitive information or further compromise the system.
CVSS Base score: 5.9
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/198199 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N)

CVEID:   CVE-2020-28476
DESCRIPTION:   Tornado is vulnerable to HTTP response splitting attacks. A remote attacker could exploit this vulnerability to inject arbitrary HTTP headers and cause the server to return a split response, once the URL is clicked. This would allow the attacker to perform further attacks, such as Web cache poisoning or cross-site scripting, and possibly obtain sensitive information.
CVSS Base score: 6.8
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/195065 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H)

CVEID:   CVE-2021-3177
DESCRIPTION:   Python is vulnerable to a buffer overflow, caused by improper bounds checking by the PyCArg_repr function in _ctypes/callproc.c. By sending specially-crafted arguments to c_double.from_param, a remote attacker could overflow a buffer and execute arbitrary code on the system.
CVSS Base score: 9.8
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/195244 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

Affected products and versions

Remediation/Fixes

Workarounds and mitigations
None

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References
Complete CVSS v3 Guide
On-line Calculator v3

Related information
IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Acknowledgement

* 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
According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an “industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response.” IBM PROVIDES THE CVSS SCORES “”AS IS”” WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.