Important: mailman

Issue Overview:

Cross-site request forgery (CSRF) vulnerability in the user options page in GNU Mailman 2.1.x before 2.1.23 allows remote attackers to hijack the authentication of arbitrary users for requests that modify an option, as demonstrated by gaining access to the credentials of a victim’s account. (CVE-2016-6893)

A Cross-Site Request Forgery (CSRF) attack can be performed in mailman due to a CSRF token bypass. CSRF tokens are not checked against the right user and a token created by one user can be used by another one to perform a request, effectively bypassing the protection provided by CSRF tokens. A remote attacker with an account on the mailman system can use this flaw to perform a CSRF attack and perform operations on behalf of the victim user. (CVE-2021-42097)

A Cross-Site Request Forgery (CSRF) attack can be performed in mailman due to a CSRF token bypass. CSRF tokens are not checked against the right type of user when performing admin operations and a token created by a regular user can be used by an admin to perform an admin-level request, effectively bypassing the protection provided by CSRF tokens. A remote attacker with an account on the mailman system can use this flaw to perform a CSRF attack and perform operations on behalf of the victim admin. (CVE-2021-44227)

Affected Packages:

mailman

Note:

This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.

Issue Correction:
Run yum update mailman to update your system.

New Packages:

aarch64:  
    mailman-2.1.15-30.amzn2.2.aarch64  
    mailman-debuginfo-2.1.15-30.amzn2.2.aarch64  
  
i686:  
    mailman-2.1.15-30.amzn2.2.i686  
    mailman-debuginfo-2.1.15-30.amzn2.2.i686  
  
src:  
    mailman-2.1.15-30.amzn2.2.src  
  
x86_64:  
    mailman-2.1.15-30.amzn2.2.x86_64  
    mailman-debuginfo-2.1.15-30.amzn2.2.x86_64  

Additional References

Red Hat: CVE-2016-6893, CVE-2021-42097, CVE-2021-44227

Mitre: CVE-2016-6893, CVE-2021-42097, CVE-2021-44227