Advisories ยป MGASA-2021-0464

Updated fail2ban packages fix security vulnerability

Publication date: 06 Oct 2021
Modification date: 06 Oct 2021
Type: security
Affected Mageia releases : 8
CVE: CVE-2021-32749

Description

fail2ban is a daemon to ban hosts that cause multiple authentication errors.
In versions 0.9.7 and prior, 0.10.0 through 0.10.6, and 0.11.0 through
0.11.2, there is a vulnerability that leads to possible remote code
execution in the mailing action mail-whois. Command `mail` from mailutils
package used in mail actions like `mail-whois` can execute command if
unescaped sequences (`\n~`) are available in "foreign" input (for
instance in whois output). To exploit the vulnerability, an attacker would
need to insert malicious characters into the response sent by the whois
server, either via a MITM attack or by taking over a whois server.
(CVE-2021-32749)

References

SRPMS

8/core