Vulnerability CVE-2020-5136

Vulnerability Name:

CVE-2020-5136 (CCN-189651)

Assigned:

2019-12-31

Published:

2020-10-12

Updated:

2020-10-23

Summary:

A buffer overflow vulnerability in SonicOS allows an authenticated attacker to cause Denial of Service (DoS) in the SSL-VPN and virtual assist portal, which leads to a firewall crash. This vulnerability affected SonicOS Gen 5 version 5.9.1.7, 5.9.1.13, Gen 6 version 6.5.4.7, 6.5.1.12, 6.0.5.3, SonicOSv 6.5.4.v and Gen 7 version 7.0.0.0.

CVSS v3 Severity:

6.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
5.7 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): Low User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): High

6.5 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
5.7 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): Low User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): High

CVSS v2 Severity:

4.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:S/C:N/I:N/A:P)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Authentication (Au): Single_Instance
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Partial

6.8 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:S/C:N/I:N/A:C)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Athentication (Au): Single_Instance
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Complete

Vulnerability Type:

CWE-120

Vulnerability Consequences:

Denial of Service

References:

Source: MITRE
Type: CNA
CVE-2020-5136

Source: XF
Type: UNKNOWN
sonicwall-cve20205136-dos(189651)

Source: CCN
Type: SonicWall Security Advisory SNWLID-2020-0011
SonicOS SSLVPN and Virtual assist service authenticated buffer overflow leads to firewall crash

Source: CONFIRM
Type: Vendor Advisory
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2020-0011

Vulnerable Configuration:

Configuration 1:

cpe:/o:sonicwall:sonicos:*:*:*:*:*:*:*:* (Version <= 5.9.1.13)

OR cpe:/o:sonicwall:sonicos:*:*:*:*:*:*:*:* (Version >= 6.0.0.0 and <= 6.0.5.3)

OR cpe:/o:sonicwall:sonicos:*:*:*:*:*:*:*:* (Version >= 6.5.0.0 and <= 6.5.1.11)

OR cpe:/o:sonicwall:sonicos:*:*:*:*:*:*:*:* (Version >= 6.5.4.0 and <= 6.5.4.7)

OR cpe:/o:sonicwall:sonicos:7.0.0.0:*:*:*:*:*:*:*

OR cpe:/o:sonicwall:sonicosv:*:*:*:*:*:*:*:* (Version <= 6.5.4.4)

Denotes that component is vulnerable

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