#VU27366 Stored cross-site scripting in Mailman - CVE-2020-12137
Vulnerability identifier: #VU27366
Vulnerability risk: Medium
CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Green]
CVE-ID: CVE-2020-12137
CWE-ID:
CWE-79
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Mailman
Web applications /
Webmail solutions
Vendor: GNU
Description
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to mailman uses the .obj extension for scrubbed application/octet-stream MIME parts. A remote attacker can send a specially crafted attachment to the list, trick the victim to open the email in the list archive and execute arbitrary HTML and script code in user's browser in context of vulnerable website.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Mailman: 2.0.1 - 2.1.29
External links
https://bazaar.launchpad.net/~mailman-coders/mailman/2.1/view/head:/NEWS
https://www.openwall.com/lists/oss-security/2020/04/24/3
https://www.openwall.com/lists/oss-security/2020/02/24/2
https://www.openwall.com/lists/oss-security/2020/02/24/3
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
