Multiple vulnerabilities in PaperCut NG/MF

1) Cross-site request forgery

EUVDB-ID: #VU80181

Risk: Medium

CVSSv3.1: 7.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2023-2533

CWE-ID: CWE-352 - Cross-Site Request Forgery (CSRF)

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to perform cross-site request forgery attacks.

The vulnerability exists due to insufficient validation of the HTTP request origin. A remote attacker can trick the application administrator to visit a specially crafted web page and perform arbitrary actions on behalf of the victim on the vulnerable website, such as alter security settings or execute arbitrary code.

Mitigation

Install update from vendor's website.

Vulnerable software versions

PaperCut NG: before 20.1.8, 21.2.12, 22.1.1, 20.1.8, 20.1.8

PaperCut MF: before 20.1.8, 21.2.12, 22.1.1, 20.1.8, 20.1.8

CPE2.3

• cpe:2.3:a:papercut:papercut_ng:*:*:*:*:*:*:*:
• cpe:2.3:a:papercut:papercut_mf:*:*:*:*:*:*:*:

External links

http://fluidattacks.com/advisories/arcangel/
http://www.papercut.com/kb/Main/SecurityBulletinJune2023

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. However, proof of concept for this vulnerability is available.

2) Path traversal

EUVDB-ID: #VU80182

Risk: Medium

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

CVE-ID: CVE-2023-31046

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences within the Application Server and Site Server. A remote non-authenticated attacker can send a specially crafted HTTP request and read arbitrary files on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

PaperCut NG: 21.2.0 - 22.1.0

PaperCut MF: before 21.2.12, 22.1.1, 21.2.12

CPE2.3

• cpe:2.3:a:papercut:papercut_ng:21.2.11:*:*:*:*:*:*:
• cpe:2.3:a:papercut:papercut_ng:22.1.0:*:*:*:*:*:*:

External links

http://www.papercut.com/kb/Main/SecurityBulletinJune2023/

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.

3) Code Injection

EUVDB-ID: #VU80183

Risk: Low

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-39469

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

Exploit availability: No

Description

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

The vulnerability exists due to improper input validation within the External User Lookup functionality. A remote privileged user can send a specially crafted request and execute arbitrary Java code on the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

PaperCut NG: before 22.1.1

PaperCut MF: before 22.1.1

CPE2.3

External links

http://www.papercut.com/kb/Main/SecurityBulletinJune2023/
http://www.zerodayinitiative.com/advisories/ZDI-23-1285/

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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