What’s Vulnerable › Vulnerabilities

CVE-2018-16789

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 6.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-03-21 · updated 2026-06-17
• Weakness: CWE-835

Description

libhttp/url.c in shellinabox through 2.20 has an implementation flaw in the HTTP request parsing logic. By sending a crafted multipart/form-data HTTP request, an attacker could exploit this to force shellinaboxd into an infinite loop, exhausting available CPU resources and taking the service down.

Affected products

• Shellinabox Project Shellinabox: through 2.20

References

• http://packetstormsecurity.com/files/149978/Shell-In-A-Box-2.2.0-Denial-Of-Service.html
• http://seclists.org/fulldisclosure/2018/Oct/50
• https://code.google.com/archive/p/shellinabox/issues
• https://github.com/shellinabox/shellinabox/commit/4f0ecc31ac6f985e0dd3f5a52cbfc0e9251f6361
• http://packetstormsecurity.com/files/149978/Shell-In-A-Box-2.2.0-Denial-Of-Service.html
• http://seclists.org/fulldisclosure/2018/Oct/50
• https://code.google.com/archive/p/shellinabox/issues
• https://github.com/shellinabox/shellinabox/commit/4f0ecc31ac6f985e0dd3f5a52cbfc0e9251f6361

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