Multiple vulnerabilities in Dell Wyse ThinLinux



Risk High
Patch available YES
Number of vulnerabilities 4
CVE-ID CVE-2020-8597
CVE-2019-13117
CVE-2019-13118
CVE-2019-16168
CWE-ID CWE-119
CWE-200
CWE-369
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Public exploit code for vulnerability #4 is available.
Vulnerable software
 Wyse ThinLinux
Operating systems & Components / Operating system

Vendor Dell

Security Bulletin

This security bulletin contains information about 4 vulnerabilities.

1) Buffer overflow

EUVDB-ID: #VU24916

Risk: High

CVSSv4.0: 8.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber]

CVE-ID: CVE-2020-8597

CWE-ID: CWE-119 - Memory corruption

Exploit availability: Yes

Description

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

The vulnerability exists due to a boundary error in the "eap_request" and "eap_response" functions in "eap.c" file in pppd. A remote attacker can trigger memory corruption and execute arbitrary code on the target system.

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

Mitigation

Install update from vendor's website.

Vulnerable software versions

Wyse ThinLinux: before 2.2.1.01

CPE2.3 External links

https://www.dell.com/support/kbdoc/en-us/000177563/dsa-2020-097-dell-wyse-thinlinux-security-update-for-multiple-third-party-components-vulnerabilities


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. However, proof of concept for this vulnerability is available.

2) Information disclosure

EUVDB-ID: #VU18965

Risk: Low

CVSSv4.0: 0.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-13117

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 information disclosure in numbers.c in libxslt library where an xsl:number with certain format strings could lead to a uninitialized read in xsltNumberFormatInsertNumbers. A remote attacker can gain knowledge whether a byte on the stack contains the characters A, a, I, i, or 0, or any other character.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Wyse ThinLinux: before 2.2.1.01

CPE2.3 External links

https://www.dell.com/support/kbdoc/en-us/000177563/dsa-2020-097-dell-wyse-thinlinux-security-update-for-multiple-third-party-components-vulnerabilities


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) Information disclosure

EUVDB-ID: #VU18966

Risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-13118

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 uninitialized stack data exposure in numbers.c in libxslt library when processing an invalid character/length combination in xsltNumberFormatDecimal. A remote attacker can gain pass specially crafted data to the application using the affected library and gain access to sensitive information.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Wyse ThinLinux: before 2.2.1.01

CPE2.3 External links

https://www.dell.com/support/kbdoc/en-us/000177563/dsa-2020-097-dell-wyse-thinlinux-security-update-for-multiple-third-party-components-vulnerabilities


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) Division by zero

EUVDB-ID: #VU23188

Risk: Low

CVSSv4.0: 2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2019-16168

CWE-ID: CWE-369 - Divide By Zero

Exploit availability: Yes

Description

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

The vulnerability exists due to a division by zero error within the whereLoopAddBtreeIndex in sqlite3.c due to improper input validation in the sqlite_stat1 sz field. A remote attacker can pass specially crafted data to the application, trigger division by zero error and crash the vulnerable application.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Wyse ThinLinux: before 2.2.1.01

CPE2.3 External links

https://www.dell.com/support/kbdoc/en-us/000177563/dsa-2020-097-dell-wyse-thinlinux-security-update-for-multiple-third-party-components-vulnerabilities


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. However, proof of concept for this vulnerability is available.



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