Fedora 34 update for sympa

1) OS Command Injection

EUVDB-ID: #VU47651

Risk: Low

CVSSv4.0: 7.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/U:Clear]

CVE-ID: CVE-2020-26880

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to incorrect default permissions for the sympa.conf configuration file. A local user with access to modify the file (e.g. the sympa user account) can injection and execute arbitrary OS commands in the system with root privileges via the setuid sympa_newaliases-wrapper executable by parsing the modified sympa.conf file.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 34

sympa: before 6.2.62-1.fc34

CPE2.3

• cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
• cpe:2.3:a:fedoraproject:sympa:*:*:*:*:*:fedora:*:*

External links

https://bodhi.fedoraproject.org/updates/FEDORA-2021-af8fa074ad

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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