Ubuntu update for mailman



Risk Medium
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2021-42096
CVE-2021-42097
CWE-ID CWE-338
CWE-352
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Ubuntu
Operating systems & Components / Operating system

mailman (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)

EUVDB-ID: #VU58348

Risk: Medium

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-42096

CWE-ID: CWE-338 - Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)

Exploit availability: No

Description

The vulnerability allows a remote attacker to brute-force the administrative password.

The vulnerability exists due to a certain csrf_token value is derived from the admin password. A remote attacker can conduct a brute-force attack against that password and gain unauthorized access to the application.

Mitigation

Update the affected package mailman to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 18.04

mailman (Ubuntu package): before 1:2.1.26-1ubuntu0.4

CPE2.3 External links

https://ubuntu.com/security/notices/USN-5121-1


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Cross-site request forgery

EUVDB-ID: #VU58347

Risk: Medium

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-42097

CWE-ID: CWE-352 - Cross-Site Request Forgery (CSRF)

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform cross-site request forgery attacks.

The vulnerability exists due to insufficient validation of the HTTP request origin. A remote attacker can trick the victim to visit a specially crafted web page and take over the admin account, as the csrf_token value is not specific to a single user account.

Mitigation

Update the affected package mailman to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 18.04

mailman (Ubuntu package): before 1:2.1.26-1ubuntu0.4

CPE2.3 External links

https://ubuntu.com/security/notices/USN-5121-1


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.



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