Multiple vulnerabilities in SonicWall SonicOS

1) Cross-site scripting

EUVDB-ID: #VU47691

Risk: Medium

CVSSv3.1: 3.4 [CVSS:3.1/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 - 7.0

External links

http://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

EUVDB-ID: #VU47690

Risk: Medium

CVSSv3.1: 3.4 [CVSS:3.1/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 - 7.0

External links

http://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

EUVDB-ID: #VU47689

Risk: High

CVSSv3.1: 3.4 [CVSS:3.1/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 - 7.0

External links

http://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

EUVDB-ID: #VU47688

Risk: High

CVSSv3.1: 3.4 [CVSS:3.1/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 - 7.0

External links

http://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

EUVDB-ID: #VU47687

Risk: High

CVSSv3.1: 3.4 [CVSS:3.1/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 - 7.0

External links

http://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

EUVDB-ID: #VU47686

Risk: High

CVSSv3.1: 3.4 [CVSS:3.1/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 - Memory corruption

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 - 7.0

External links

http://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

EUVDB-ID: #VU47685

Risk: High

CVSSv3.1: 3.4 [CVSS:3.1/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 - Memory corruption

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 - 7.0

External links

http://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

EUVDB-ID: #VU47684

Risk: Critical

CVSSv3.1: 3.4 [CVSS:3.1/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 - Memory corruption

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 - 7.0

External links

http://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

EUVDB-ID: #VU47683

Risk: Medium

CVSSv3.1: 3.4 [CVSS:3.1/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 - 7.0

External links

http://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

EUVDB-ID: #VU47682

Risk: Low

CVSSv3.1: 3.4 [CVSS:3.1/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 - 7.0

External links

http://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

EUVDB-ID: #VU47681

Risk: High

CVSSv3.1: 3.4 [CVSS:3.1/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 - Memory corruption

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 - 7.0

External links

http://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.