PT-2022-2396 · Fortinet · Fortiwan

Published 2022-04-06 · Updated 2022-04-13 · CVE-2021-26112

Positive Technologies (AI Summary)

CVSS v2.0

10

Critical

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions FortiWAN versions prior to 4.5.9

Description The issue is related to multiple stack-based buffer overflow vulnerabilities in both network daemons and the command line interpreter. This may allow an unauthenticated attacker to potentially corrupt control data in memory and execute arbitrary code via specifically crafted requests. The vulnerability is associated with writing beyond the boundaries of a buffer in memory, which can be exploited by a remote attacker to execute arbitrary code.

Recommendations For versions prior to 4.5.9, update to version 4.5.9 or later to resolve the issue. As a temporary workaround, consider restricting access to the network daemons and the command line interpreter to minimize the risk of exploitation. Avoid using specifically crafted requests that may trigger the buffer overflow vulnerability until the issue is resolved.

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

BDU:2022-02766

CVE-2021-26112

Affected Products

Fortiwan

References · 6

• https://fortiguard.com/psirt/FG-IR-21-065 · Vendor Advisory
• https://bdu.fstec.ru/vul/2022-02766 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-26112 · Security Note
• https://osv.dev/vulnerability/CVE-2021-26112 · Vendor Advisory
• https://t.me/cvenotify/28525 · Telegram Post
• https://t.me/cvenotify/28515 · Telegram Post