OS command injection in Apache SpamAssassin

1) OS Command Injection

EUVDB-ID: #VU51703

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-1946

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 remote attacker to execute arbitrary shell commands on the target system.

The vulnerability exists due to improper input validation when processing rule configuration (.cf) files. A remote authenticated attacker trick the victim use a specially crafted rule configuration file and execute arbitrary OS commands on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

SpamAssassin: 3.0.0 - 3.4.4

External links

http://mail-archives.apache.org/mod_mbox/spamassassin-announce/202103.mbox/%3C241c47dc-467f-c622-c8ab-e06df159b475%40apache.org%3E

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.