PT-2021-17404 · Opensips · Opensis Community Edition

Evan Yu · Published 2021-09-16 · Updated 2021-09-27 · CVE-2021-27341

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions OpenSIS Community Edition versions prior to 7.7

Description The issue is related to a local file inclusion vulnerability in the DownloadWindow.php file, specifically via the filename parameter. This vulnerability can potentially be exploited to access unauthorized files on the system.

Recommendations For OpenSIS Community Edition versions prior to 7.7, update to version 7.7 or later to resolve the issue. As a temporary workaround, consider restricting access to the DownloadWindow.php file or disabling the filename parameter until a patch is available.

Fix

Path traversal

Weakness Enumeration

CWE-22

Related Identifiers

CVE-2021-27341

Affected Products

Opensis Community Edition

References · 6

• https://github.com/OS4ED/openSIS-Classic/commit/f78407d5291c686c3f416073dcb9143f3a3d5489#diff-24b751f2072f058259d033016938101f9fa29884ebcc09ce7eb88def3421e5ba · Patch
• https://osv.dev/vulnerability/CVE-2021-27341 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-27341 · Security Note
• https://github.com/OS4ED/openSIS-Classic/issues/158 · Note
• https://github.com/OS4ED/openSIS-Classic/releases · Note
• https://t.me/cibsecurity/28989 · Telegram Post