#VU80409 Arbitrary file upload in A.K.I Software products - CVE-2023-39933

Vulnerability identifier: #VU80409

Vulnerability risk: Medium

CVSSv4.0: 6.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-39933

CWE-ID: CWE-434

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
PMailServer Standard edition
Server applications / Other server solutions
PMailServer Pro edition
Server applications / Other server solutions
PMailServer Standard + IMAP4 edition
Server applications / Other server solutions
PMailServer Pro + IMAP4 edition
Server applications / Other server solutions
PMailServer2 Standard edition
Server applications / Other server solutions
PMailServer2 Pro edition
Server applications / Other server solutions
PMailServer2 Standard + IMAP4 edition
Server applications / Other server solutions
PMailServer2 Pro + IMAP4 edition
Server applications / Other server solutions
PMailServer2 Enterprise edition
Server applications / Other server solutions

Vendor: A.K.I Software

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to insufficient validation of file during file upload in Broadcast Mail CGI (pmc.exe). A remote user can upload a malicious file and execute it on the server.

Note: The following CGIs included with the vulnerable products are affected by the vulnerability.

• pmc.exe 2.5.1.720 and earlier
• pmam.exe 2.5.1.1411 and earlier
• pmmls.exe 2.5.1.561 and earlier
• pmum.exe (Standard edition) 2.5.1.25451 and earlier
• pmum.exe (Pro edition) 2.5.1.25452 and earlier
• pmum.exe (Standard + IMAP4 edition) 2.5.1.25453 and earlier
• pmum.exe (Pro + IMAP4 edition / Enterprise edition) 2.5.1.25454 and earlier
• pmman.exe (Standard edition) 2.5.1.12154 and earlier
• pmman.exe (Pro edition) 2.5.1.12155 and earlier
• pmman.exe (Standard + IMAP4 edition) 2.5.1.12156 and earlier
• pmman.exe (Pro + IMAP4 edition) 2.5.1.12157 and earlier
• pmman.exe (Enterprise edition) 2.5.1.12158 and earlier

Mitigation
Install updates from vendor's website.

Vulnerable software versions

PMailServer Standard edition: 1.91

PMailServer Pro edition: 1.91

PMailServer Standard + IMAP4 edition: 1.91

PMailServer Pro + IMAP4 edition: 1.91

PMailServer2 Standard edition: before 2.51a

PMailServer2 Pro edition: before 2.51a

PMailServer2 Standard + IMAP4 edition: before 2.51a

PMailServer2 Pro + IMAP4 edition: before 2.51a

PMailServer2 Enterprise edition: before 2.51a

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External links
https://jvn.jp/en/jp/JVN92720882/index.html
https://akisoftware.com/Vulnerability202301.html

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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