Security Bulletin
Summary
IBM SmartCloud Entry is vulnerable to Python vulnerabilities. Attackers could exploit these vulnerabilities to strip out the STARTTLS command without generating an exception on the python SMTP client application and prevent the establishment of the TLS layer, inject arbitrary HTTP headers, which will allow the attacker to conduct various attacks against the vulnerable system, including cross-site scripting, cache poisoning or session hijacking, or redirect outbound HTTP traffic to arbitrary proxy server. This is also known as the "HTTPOXY" vulnerability.
Vulnerability Details
CVEID: CVE-2016-0772
DESCRIPTION: Python's smtplib library is vulnerable to a stripping attack. An exception isn't returned by the Python's smtplib library if StartTLS fails to establish correctly in the SMTP.starttls() function. An attacker with man-in-the-middle ability could exploit this vulnerability to strip out the STARTTLS command without generating an exception on the python SMTP client application and prevent the establishment of the TLS layer.
CVSS Base Score: 6.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/114287 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N)
CVEID: CVE-2016-5699
DESCRIPTION: urllib2 and urllib for Python are vulnerable to HTTP header injection, caused by improper validation of input. By persuading a victim to visit a specially-crafted Web page, a remote attacker could exploit this vulnerability to inject arbitrary HTTP headers, which will allow the attacker to conduct various attacks against the vulnerable system, including cross-site scripting, cache poisoning or session hijacking.
CVSS Base Score: 6.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/114200 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N)
CVEID: CVE-2016-1000110
DESCRIPTION: Python could allow a remote attacker to redirect HTTP traffic of CGI application, caused by the failure to protect applications from the presence of untrusted client data in the HTTP_PROXY environment variable. By using a specially-crafted Proxy header in a HTTP request, an attacker could exploit this vulnerability to redirect outbound HTTP traffic to arbitrary proxy server. This is also known as the "HTTPOXY" vulnerability.
CVSS Base Score: 8.1
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/115381 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)
Affected Products and Versions
IBM SmartCloud Entry 2.2.0 through 2.2.0.4 Appliance fix pack 7
IBM SmartCloud Entry 2.3.0 through 2.3.0.4 Appliance fix pack 7
IBM SmartCloud Entry 2.4.0 through 2.4.0.4 Appliance fix pack 7
IBM SmartCloud Entry 3.1.0 through 3.1.0.4 Appliance fix pack 22
IBM SmartCloud Entry 3.2.0 through 3.2.0.4 Appliance fix pack 22
Remediation/Fixes
Workarounds and Mitigations
None
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References
Change History
November 25, 2016: Original version published
*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.
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Document Information
Modified date:
18 July 2020
UID
isg3T1024732