#VU9375 Heap-based buffer overflow in Procmail - CVE-2017-16844

Vulnerability identifier: #VU9375

Vulnerability 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

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Procmail
Server applications / Mail servers

Vendor: Procmail.org

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

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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.