Remote code execution in procmail

1) Heap-based buffer overflow

EUVDB-ID: #VU9375

Risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2017-16844

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to boundary error in the loadbuf() function in formisc.c in formail in procmail 3.22. A remote attacker can execute arbitrary code on the target system via a specially crafted e-mail message because of a hardcoded realloc size.

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

Mitigation

The procmail project is not supported any more. it is advised to replace this mailing agent with another solution.

Vulnerable software versions

Procmail: 3.12 - 3.22

CPE2.3

• cpe:2.3:a:procmail_org:procmail:3.12:*:*:*:*:*:*:*
• cpe:2.3:a:procmail_org:procmail:3.13:*:*:*:*:*:*:*
• cpe:2.3:a:procmail_org:procmail:3.14:*:*:*:*:*:*:*

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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