Auth bypass in Att U-Verse Firmware
CVE-2017-14117
The AT&T U-verse 9.2.2h0d83 firmware for the Arris NVG589 and NVG599 devices, when IP Passthrough mode is not used, configures an unauthenticated proxy service on WAN TCP port 49152, which allows remote attackers to establish arbitrary TCP connections to intranet hosts by sending \x2a\xce\x01 followed by other predictable values.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.080 (94.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 94.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.080 · newest: 0.080 · change: 0.000
Affected products
- Att U-Verse Firmware — versions 9.2.2h0d83
- Commscope Arris Nvg589
- Commscope Arris Nvg599
Weakness classification (CWE)
Public proof-of-concept exploits
References
- threatpost.com/bugs-in-arris-modems-distributed-by-att-vulnerable-to-trivial-at… (Third Party Advisory)
- www.securityfocus.com/bid/100585 (VDB Entry, Third Party Advisory, vdb-entry)
- www.nomotion.net/blog/sharknatto/ (Technical Description, Exploit, Third Party Advisory, Mitigation)
Frequently asked questions
- What is CVE-2017-14117?
- CVE-2017-14117 is a medium-severity vulnerability in Att U-Verse Firmware, classified under Improper Authentication. CVSS score: 5.9/10. Published 2017-09-03.
- How severe is CVE-2017-14117?
- Medium severity. CVSS v3 base score is 5.9 out of 10.
- Is CVE-2017-14117 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.