CVE-2021-31361 is a Denial of Service (DoS) vulnerability in Juniper Networks Junos OS affecting QFX and PTX Series devices. An unauthenticated attacker can exploit improper handling of exceptional conditions by sending specific VXLAN-encapsulated IP packets, leading to increased FPC CPU utilization and a sustained DoS. This vulnerability has a CVSS score of 5.3 (Medium), indicating a low attack complexity and no user interaction required. The primary impact is a loss of availability due to the sustained DoS condition. Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 18.4R3-S9CPE match | cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:* | ||
>= 19.1, < 19.1R3-S6CPE match | cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:* | ||
>= 20.2, < 20.2R3-S1CPE match | cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:* | ||
< 17.3R3-S11CPE match | cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:* | ||
>= 18.1, < 18.1R3-S12CPE match | cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.