CVE-2021-42756 — Stack-based Buffer Overflow in Fortinet Fortiweb

CWE-121 — Stack-based Buffer OverflowCWE-787 — Out-of-bounds Write4 documents4 sources
Severity
9.8CRITICALNVD
EPSS
71.9%
top 1.25%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Fortinet Fortiweb
Timeline
PublishedFeb 16

Description

Multiple stack-based buffer overflow vulnerabilities [CWE-121] in the proxy daemon of FortiWeb 5.x all versions, 6.0.7 and below, 6.1.2 and below, 6.2.6 and below, 6.3.16 and below, 6.4 all versions may allow an unauthenticated remote attacker to achieve arbitrary code execution via specifically crafted HTTP requests.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 3.9 | Impact: 5.9

Affected Packages2 packages

▶CVEListV5fortinet/fortiweb5.8.0 — 5.8.*+12
▶NVDfortinet/fortiweb5.6.0 — 6.0.8+4

🔴Vulnerability Details

2
CVEList
CVE-2021-42756: Multiple stack-based buffer overflow vulnerabilities [CWE-121] in the proxy daemon of FortiWeb 5↗2023-02-16
▶
GHSA
GHSA-wqmg-f43p-5ccf: Multiple stack-based buffer overflow vulnerabilities [CWE-121] in the proxy daemon of FortiWeb 5↗2023-02-16
▶

📋Vendor Advisories

1
Fortinet
Multiple stack-based buffer overflow vulnerabilities [CWE-121] in the proxy daemon of FortiWeb 5.x all versions, 6.0.7 a...↗2023-02-16
▶
CVE-2021-42756 — Stack-based Buffer Overflow | cvebase