CVE-2021-42757
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I. Basic Information for CVE-2021-42757
Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Description
A buffer overflow [CWE-121] in the TFTP client library of FortiOS before 6.4.7 and FortiOS 7.0.0 through 7.0.2, may allow an authenticated local attacker to achieve arbitrary code execution via specially crafted command line arguments.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Fortinet FortiOS 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Fortinet FortiOS是美国飞塔（Fortinet）公司的一套专用于FortiGate网络安全平台上的安全操作系统。该系统为用户提供防火墙、防病毒、IPSec/SSLVPN、Web内容过滤和反垃圾邮件等多种安全功能。 Fortinet FortiOS 存在安全漏洞，该漏洞源于FortiOS 6.4.7 和 FortiOS 7.0.0 到 7.0.2 之前的 TFTP 客户端库中的缓冲区溢出 [CWE-121] 可能允许经过身份验证的本地攻击者通过特制的命令行参数实现任意代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Fortinet | FortiOS | 7.0.0 ~ 7.0.2 | cpe:2.3:o:fortinet:fortios:7.0.2:*:*:*:*:*:*:* | |
| Fortinet | FortiDDoS-F | 6.4.0 ~ 6.4.1 | cpe:2.3:o:fortinet:fortiddos-f:6.4.1:*:*:*:*:*:*:* | |
| Fortinet | FortiVoice | 6.4.0 ~ 6.4.4 | cpe:2.3:a:fortinet:fortivoice:6.4.4:*:*:*:*:*:*:* | |
| Fortinet | FortiProxy | 7.0.0 ~ 7.0.1 | - | |
| Fortinet | FortiRecorder | 6.4.0 ~ 6.4.2 | cpe:2.3:a:fortinet:fortirecorder:6.4.2:*:*:*:*:*:*:* | |
| Fortinet | FortiPortal | 6.0.0 ~ 6.0.10 | cpe:2.3:a:fortinet:fortiportal:6.0.10:*:*:*:*:*:*:* | |
| Fortinet | FortiMail | 7.0.0 ~ 7.0.2 | cpe:2.3:a:fortinet:fortimail:7.0.2:*:*:*:*:*:*:* | |
| Fortinet | FortiAnalyzer | 7.0.0 ~ 7.0.2 | cpe:2.3:o:fortinet:fortianalyzer:7.0.2:*:*:*:*:*:*:* | |
| Fortinet | FortiNDR | 1.5.0 ~ 1.5.2 | - | |
| Fortinet | FortiDDoS | 5.5.0 ~ 5.5.1 | cpe:2.3:o:fortinet:fortiddos:5.5.1:*:*:*:*:*:*:* | |
| Fortinet | FortiSwitch | 7.0.0 ~ 7.0.3 | cpe:2.3:a:fortinet:fortiswitch:7.0.3:*:*:*:*:*:*:* | |
| Fortinet | FortiADC | 6.2.0 ~ 6.2.2 | cpe:2.3:h:fortinet:fortiadc:6.2.2:*:*:*:*:*:*:* | |
| Fortinet | FortiWeb | 6.4.0 ~ 6.4.1 | - | |
| Fortinet | FortiManager | 7.0.0 ~ 7.0.2 | cpe:2.3:o:fortinet:fortimanager:7.0.2:*:*:*:*:*:*:* |
II. Public POCs for CVE-2021-42757
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://fortiguard.com/advisory/FG-IR-21-173x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2021-42757
Same Patch Batch · Fortinet · 2021-12-08 · 28 CVEs total
| CVE-2021-41017 | 8.8 HIGH | Fortinet FortiWeb 缓冲区错误漏洞 |
| CVE-2021-42758 | 8.8 HIGH | Fortinet FortiWLC 访问控制错误漏洞 |
| CVE-2021-42760 | 8.8 HIGH | Fortinet FortiWLM SQL注入漏洞 |
| CVE-2021-43067 | 8.3 HIGH | Fortinet FortiAuthenticator 信息泄露漏洞 |
| CVE-2021-36180 | 8.1 HIGH | Fortinet FortiWeb 操作系统命令注入漏洞 |
| CVE-2021-26109 | 8.1 HIGH | Fortinet FortiOS 输入验证错误漏洞 |
| CVE-2021-36173 | 8.0 HIGH | Fortinet FortiOS 缓冲区错误漏洞 |
| CVE-2021-26110 | 7.8 HIGH | Fortinet FortiOS 安全漏洞 |
| CVE-2021-41021 | 7.8 HIGH | Fortinet FortiNAC 安全漏洞 |
| CVE-2021-41024 | 7.5 HIGH | Fortinet FortiOS 路径遍历漏洞 |
| CVE-2021-41014 | 7.5 HIGH | Fortinet FortiWeb 资源管理错误漏洞 |
| CVE-2021-26108 | 7.5 HIGH | Fortinet FortiOS 信任管理问题漏洞 |
| CVE-2021-41025 | 7.3 HIGH | Fortinet FortiWeb 竞争条件问题漏洞 |
| CVE-2021-41027 | 7.3 HIGH | Fortinet FortiWeb 缓冲区错误漏洞 |
| CVE-2021-41029 | 6.4 MEDIUM | Fortinet FortiWLM 跨站脚本漏洞 |
| CVE-2021-26103 | 6.3 MEDIUM | Fortinet FortiProxy SSL VPN 数据伪造问题漏洞 |
| CVE-2021-41015 | 6.1 MEDIUM | Fortinet FortiWeb跨站脚本漏洞 |
| CVE-2021-43063 | 6.1 MEDIUM | Fortinet FortiWeb 跨站脚本漏洞 |
| CVE-2021-36188 | 6.1 MEDIUM | Fortinet FortiWeb 跨站脚本漏洞 |
| CVE-2021-36190 | 5.5 MEDIUM | Fortinet FortiWeb安全漏洞 |
Showing top 20 of 28 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same weakness: CWE-120
- CVE-2026-8260
D-Link DCS-935L HNAP Service hnap_service SetDeviceSettings - CVE-2026-8137
Totolink X5000R formDdns sub_458E40 buffer overflow - CVE-2026-6691
MongoDB C Driver Cyrus SASL Canonicalization Buffer Overflow - CVE-2026-7857
D-Link DI-8100 CGI user_group.asp sprintf buffer overflow - CVE-2026-7856
D-Link DI-8100 Web Management url_member.asp buffer overflow
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