CVE-2021-31366 is an Unchecked Return Value vulnerability in Juniper Networks Junos OS on MX Series devices configured for subscriber management. An adjacent attacker can trigger a Denial of Service (DoS) by sending a specific username to the authd (authentication daemon), impacting authentication, authorization, and accounting (AAA) services. This vulnerability has a CVSS score of 6.5 (Medium), indicating a low attack complexity and no user interaction required, with a high impact on availability. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 15.1, < 15.1R7-S9CPE match | cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:* | ||
>= 17.3, < 17.3R3-S12CPE match | cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:* | ||
>= 17.4, < 17.4R3-S5CPE match | cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:* | ||
>= 18.1, < 18.1R3-S13CPE match | cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:* | ||
>= 18.2, < 18.2R3-S8CPE match | cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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