CVE-2017-2893
Quick assessment
Affected
Cesanta Mongoose
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Cesanta Mongoose是爱尔兰Cesanta公司的一套嵌入式服务器库，它包括TCP、HTTP客户端和服务器、WenSocket客户端和服务器等功能。 Cesanta Mongoose 6.8版本中的MQTT数据包解析功能存在安全漏洞。攻击者可通过发送特制的MQTT数据包利用该漏洞造成拒绝服务（空指针逆向引用和服务器崩溃）。
Possible ATT&CK Techniques 1 AI
T1029 · Scheduled Transfer
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I. Basic Information for CVE-2017-2893
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
An exploitable NULL pointer dereference vulnerability exists in the MQTT packet parsing functionality of Cesanta Mongoose 6.8. An MQTT SUBSCRIBE packet can cause a NULL pointer dereference leading to server crash and denial of service. An attacker needs to send a specially crafted MQTT packet over the network to trigger this vulnerability.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Cesanta Mongoose 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cesanta Mongoose是爱尔兰Cesanta公司的一套嵌入式服务器库，它包括TCP、HTTP客户端和服务器、WenSocket客户端和服务器等功能。 Cesanta Mongoose 6.8版本中的MQTT数据包解析功能存在安全漏洞。攻击者可通过发送特制的MQTT数据包利用该漏洞造成拒绝服务（空指针逆向引用和服务器崩溃）。
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
II. Public POCs for CVE-2017-2893
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Other References for CVE-2017-2893 (1)
Same Patch Batch · Cesanta · 2017-11-07 · 8 CVEs total
| CVE-2017-2891 | Cesanta Mongoose 安全漏洞 | |
| CVE-2017-2892 | Cesanta Mongoose 数字错误漏洞 | |
| CVE-2017-2894 | Cesanta Mongoose 缓冲区错误漏洞 | |
| CVE-2017-2895 | Cesanta Mongoose 数字错误漏洞 | |
| CVE-2017-2909 | Cesanta Mongoose 安全漏洞 | |
| CVE-2017-2921 | Cesanta Mongoose 数字错误漏洞 | |
| CVE-2017-2922 | Cesanta Mongoose 安全漏洞 |
IV. Related Vulnerabilities
Same product: Mongoose
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CVE-2026-63626
Mongoose: ppp_handle_ipv6cp() uses attacker-controlled lengt -
CVE-2026-73261
Mongoose: handle_opt() missing opts[1] > len check — 1-byte -
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CVE-2026-73252
Mongoose: Unauthenticated remote heap out-of-bounds read in -
CVE-2026-101003
Cesanta Mongoose MQTT Broker main.c fn stack-based overflow
Same vendor: Cesanta
-
CVE-2026-63626
Mongoose: ppp_handle_ipv6cp() uses attacker-controlled lengt -
CVE-2026-73261
Mongoose: handle_opt() missing opts[1] > len check — 1-byte -
CVE-2026-73260
Mongoose: Out-of-bounds Read via length-counter underflow in -
CVE-2026-73252
Mongoose: Unauthenticated remote heap out-of-bounds read in -
CVE-2026-101003
Cesanta Mongoose MQTT Broker main.c fn stack-based overflow
V. Comments for CVE-2017-2893
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