#VU47689 Out-of-bounds read


Published: 2020-10-12 | Updated: 2020-10-16

Vulnerability identifier: #VU47689

Vulnerability risk: High

CVSSv3: 7.5 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-5140

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

Vulnerable software: SonicOS
Operating systems & Components / Operating system

Vendor: SonicWall

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition within the SSLVPN service when processing HTTP requests. A remote non-authenticated attacker can send specially crafted HTTP request to the device and crash it.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

SonicOS: 5.9, 6.0, 6.5, 7.0

CPE

External links
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2020-0015


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.


Latest bulletins with this vulnerability