Loop with Unreachable Exit Condition ('Infinite Loop') Affecting shellinabox package, versions *
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIAN8-SHELLINABOX-315687
- published2 Dec 2018
- disclosed21 Mar 2019
Introduced: 2 Dec 2018
CVE-2018-16789 (opens in a new tab)How to fix?
There is no fixed version for Debian:8 shellinabox.
NVD Description
Note: Versions mentioned in the description apply only to the upstream shellinabox package and not the shellinabox package as distributed by Debian.
See How to fix? for Debian:8 relevant fixed versions and status.
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.
References
- https://code.google.com/archive/p/shellinabox/issues
- https://security-tracker.debian.org/tracker/CVE-2018-16789
- 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