CVE-2018-16789

Shellinabox vulnerability

CVSS

7.5

EPSS

6.0%

EPSS pct

93th

Exploited

No known

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 vendor

Shellinabox Project

Affected product

Shellinabox

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness type (CWE)

CWE-835 — Loop with Unreachable Exit Condition (Infinite Loop)

Published

2019-03-21

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to availability.

Its EPSS score of 6.0% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 93% of all scored CVEs.

Check your external exposure to CVE-2018-16789

Confirm whether Shellinabox Project Shellinabox is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2018-16789.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2018-16789

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