PT-2023-1570 · Fortinet · Fortiweb

Published 2023-02-16 · Updated 2023-02-24 · CVE-2021-42756

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 FortiWeb versions 5.x through 6.4

Description The issue is related to multiple stack-based buffer overflow vulnerabilities in the proxy daemon of FortiWeb, which may allow an unauthenticated remote attacker to achieve arbitrary code execution via specifically crafted HTTP requests. This can be exploited by sending specially crafted HTTP requests to the vulnerable system.

Recommendations For FortiWeb versions 5.x through 6.4, update to a version that contains a fix for this issue. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Stack Overflow

Memory Corruption

Weakness Enumeration

CWE-121

CWE-787

Related Identifiers

BDU:2023-01037

CVE-2021-42756

Affected Products

Fortiweb

References · 9

• https://fortiguard.com/psirt/FG-IR-21-186 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-42756 · Vendor Advisory
• https://bdu.fstec.ru/vul/2023-01037 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-42756 · Security Note
• https://t.me/pentestingnews/33240 · Telegram Post
• https://t.me/true_secator/4087 · Telegram Post
• https://t.me/ckure/12128 · Telegram Post
• https://t.me/cibsecurity/58360 · Telegram Post
• https://t.me/cvenotify/44971 · Telegram Post