PT-2022-18978 · Verizon · Verizon 5G Home Lvskihp Outdoorunit

Matthew Lichtenberger + 1 · Published 2022-07-14 · Updated 2022-07-21 · CVE-2022-28369

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Verizon 5G Home LVSKIHP InDoorUnit (IDU) version 3.4.66.162

Description The issue concerns the failure to validate user-provided URLs within the crtcmode function's enable ssh sub-operation of the crtcrpc JSON listener, located at /lib/functions/wnc jsonsh/crtcmode.sh. A remote attacker on the local network can exploit this by providing a malicious URL, and the data from that URL is written to /usr/sbin/dropbear and then executed as root.

Recommendations For version 3.4.66.162, as a temporary workaround, consider disabling the enable ssh sub-operation of the crtcmode function until a patch is available. Restrict access to the crtcrpc JSON listener to minimize the risk of exploitation. Avoid using the crtcmode.sh script in the /lib/functions/wnc jsonsh/ directory until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Unrestricted File Upload

Weakness Enumeration

CWE-434

Related Identifiers

CVE-2022-28369

Affected Products

Verizon 5G Home Lvskihp Outdoorunit

References · 6

• 🔥 https://github.com/JousterL/SecWriteups/blob/main/Verizon%20LVSKIHP%205G%20Modem/readme.md · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2022-28369 · Security Note
• https://verizon.com/info/reportsecurityvulnerability · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2022-28369 · Vendor Advisory
• https://t.me/cvenotify/33069 · Telegram Post
• https://t.me/cibsecurity/46226 · Telegram Post