CVE-2020-5140 is a Denial of Service (DoS) vulnerability affecting SonicWall SonicOS and SonicOSv firewall appliances across multiple generations. A remote, unauthenticated attacker can trigger a memory address leak in the SSLVPN service by sending a specially crafted HTTP request. With a CVSS score of 7.5 (High), this vulnerability is easily exploitable over the network with low attack complexity, leading to a complete loss of availability for the affected service. There is no evidence of active exploitation, nor are public exploit tools like Metasploit or ExploitDB available, though it has received some community discussion.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 5.9.1.13CPE matchmatch criteria | cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:* | ||
>= 6.0.0.0, <= 6.0.5.3CPE matchmatch criteria | cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:* | ||
>= 6.5.0.0, <= 6.5.1.11CPE matchmatch criteria | cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:* | ||
>= 6.5.4.0, <= 6.5.4.7CPE matchmatch criteria | cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:* | ||
7.0.0.0CPE matchmatch criteria | cpe:2.3:o:sonicwall:sonicos:7.0.0.0:*:*:*:*:*:*:* |
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:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.