Vulnerability CVE-2020-12137
Published: 2020-04-24

Description:
GNU Mailman 2.x before 2.1.30 uses the .obj extension for scrubbed application/octet-stream MIME parts. This behavior may contribute to XSS attacks against list-archive visitors, because an HTTP reply from an archive web server may lack a MIME type, and a web browser may perform MIME sniffing, conclude that the MIME type should have been text/html, and execute JavaScript code.

Type:

CWE-79

 (Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'))

CVSS2 => (AV:N/AC:M/Au:N/C:N/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.3/10
2.9/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
None
Partial
None
Affected software
GNU -> Mailman 
Debian -> Debian linux 

 References:
http://bazaar.launchpad.net/~mailman-coders/mailman/2.1/view/head:/NEWS
http://www.openwall.com/lists/oss-security/2020/04/24/3
https://www.debian.org/security/2020/dsa-4664
https://www.openwall.com/lists/oss-security/2020/02/24/2
https://www.openwall.com/lists/oss-security/2020/02/24/3
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