Multiple vulnerabilities in SonicWall SonicOS



Published: 2020-10-16
Risk Critical
Patch available YES
Number of vulnerabilities 11
CVE ID CVE-2020-5142
CVE-2020-5141
CVE-2020-5140
CVE-2020-5139
CVE-2020-5138
CVE-2020-5137
CVE-2020-5136
CVE-2020-5135
CVE-2020-5134
CVE-2020-5143
CVE-2020-5133
CWE ID CWE-79
CWE-799
CWE-125
CWE-822
CWE-122
CWE-119
CWE-200
Exploitation vector Network
Public exploit N/A
Vulnerable software
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SonicOS
Operating systems & Components / Operating system

Vendor SonicWall

Security Advisory

1) Cross-site scripting

Risk: Medium

CVSSv3: 3.4 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-5142

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data within the SSLVPN web interface. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation

Install update 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-2020-0017

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.

2) Improper control of interaction frequency

Risk: Medium

CVSSv3: 3.4 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-5141

CWE-ID: CWE-799 - Improper Control of Interaction Frequency

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a brute-force attack.

The vulnerability exists due to usage of predictable Virtual Assist ticket identifiers and lack of anti-automation protection. A remote non-authenticated attacker can brute-force the Virtual Assist ticket ID in the firewall SSLVPN service.

Mitigation

Install update 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-2020-0016

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.

3) Out-of-bounds read

Risk: High

CVSSv3: 3.4 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-5140

CWE-ID: CWE-125 - Out-of-bounds Read

Exploit availability: No

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 update 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.

4) Untrusted Pointer Dereference

Risk: High

CVSSv3: 3.4 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-5139

CWE-ID: CWE-822 - Untrusted Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform DoS attack.

The vulnerability exists due to untrusted pointer dereference within the SSLVPN service. A remote non-authenticated attacker can send a specially crafted request to the device and crash it.

Mitigation

Install update 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-2020-0014

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.

5) Heap-based buffer overflow

Risk: High

CVSSv3: 3.4 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-5138

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

Description

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

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

Mitigation

Install update 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-2020-0013

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.

6) Buffer overflow

Risk: High

CVSSv3: 3.4 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-5137

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform DoS attack.

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

Mitigation

Install update 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-2020-0012

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.

7) Buffer overflow

Risk: High

CVSSv3: 3.4 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-5136

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform DoS attack.

The vulnerability exists due to a boundary error when processing requests. A remote non-authenticated attacker can send specially crafted request to the SSL-VPN and virtual assist portal, trigger memory corruption and crash the system.


Mitigation

Install update 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-2020-0011

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.

8) Buffer overflow

Risk: Critical

CVSSv3: 3.4 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-5135

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when processing requests. A remote non-authenticated attacker can send specially crafted request to the system, trigger memory corruption and crash the firewall or execute arbitrary code on the system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

SonicOS: 6.0, 6.5, 7.0

CPE External links

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2020-0010

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.

9) Out-of-bounds read

Risk: Medium

CVSSv3: 3.4 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-5134

CWE-ID: CWE-125 - Out-of-bounds Read

Exploit availability: No

Description

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

The vulnerability exists due to a boundary condition. A remote authenticated user can send specially crafted request to the system, trigger an out-of-bound invalid file reference and perform a denial of service (DoS) attack.

Mitigation

Install update 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-2020-0009

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.

10) Information disclosure

Risk: Low

CVSSv3: 3.4 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-5143

CWE-ID: CWE-200 - Information Exposure

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application on the SonicOS SSLVPN login page. A remote attacker can enumerate firewall administrators based on returned responses.

Mitigation

Install update 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-2020-0018

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.

11) Buffer overflow

Risk: High

CVSSv3: 3.4 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-5133

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

Exploit availability: No

Description

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

The vulnerability exists due to a boundary when processing network traffic. A remote non-authenticated attacker can send specially crafted traffic to the device and crash the firewall.

Mitigation

Install update from vendor's website.

Vulnerable software versions

SonicOS: 6.0, 6.5, 7.0

CPE External links

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2020-0008

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.