PT-2021-21652 · Nch · Nch Flexiserver

Published 2021-07-25 · Updated 2021-08-05 · CVE-2021-37439

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions NCH FlexiServer version 6.00

Description The issue is related to a path traversal vulnerability in the syslog component, where an attacker can potentially access files outside the intended directory by manipulating the file parameter in the syslog request, such as syslog?file=/...

Recommendations For NCH FlexiServer version 6.00, as a temporary workaround, consider restricting access to the syslog component to minimize the risk of exploitation. Avoid using the file parameter in the syslog endpoint until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Path traversal

Weakness Enumeration

CWE-22

Related Identifiers

CVE-2021-37439

Affected Products

Nch Flexiserver

References · 6

• 🔥 https://github.com/0xfml/poc/blob/main/NCH/Flexiserver_6.00_LFI.md · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-37439 · Security Note
• https://osv.dev/vulnerability/CVE-2021-37439 · Vendor Advisory
• https://t.me/cvenotify/18094 · Telegram Post
• https://nchsoftware.com/flexi/index.html · Note
• https://t.me/cibsecurity/26463 · Telegram Post