Description

Open Whisper Signal (aka Signal-Desktop) through 1.10.1 allows XSS via a resource location specified in an attribute of a SCRIPT, IFRAME, or IMG element, leading to JavaScript execution after a reply, a different vulnerability than CVE-2018-10994. The attacker needs to send HTML code directly as a message, and then reply to that message to trigger this vulnerability. The Signal-Desktop software fails to sanitize specific HTML elements that can be used to inject HTML code into remote chat windows when replying to an HTML message. Specifically the IMG and IFRAME elements can be used to include remote or local resources. For example, the use of an IFRAME element enables full code execution, allowing an attacker to download/upload files, information, etc. The SCRIPT element was also found to be injectable. On the Windows operating system, the CSP fails to prevent remote inclusion of resources via the SMB protocol. In this case, remote execution of JavaScript can be achieved by referencing the script on an SMB share within an IFRAME element, for example: <IFRAME src=\\DESKTOP-XXXXX\Temp\test.html> and then replying to it. The included JavaScript code is then executed automatically, without any interaction needed from the user. The vulnerability can be triggered in the Signal-Desktop client by sending a specially crafted message and then replying to it with any text or content in the reply (it doesn't matter).

Metrics

 

CVSS Version 4.0 CVSS Version 3.x CVSS Version 2.0

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

NIST: NVD

Base Score:  6.1 MEDIUM

Vector:  CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS 2.0 Severity and Vector Strings:

NIST: NVD

Base Score:  4.3 MEDIUM

Vector:  (AV:N/AC:M/Au:N/C:N/I:P/A:N)

References to Advisories, Solutions, and Tools

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Hyperlink	Resource
http://seclists.org/fulldisclosure/2018/May/46	Mailing List  Patch  Third Party Advisory

Weakness Enumeration

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

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Change History

3 change records found show changes

CVE Modified by MITRE 5/14/2024 12:55:19 AM

Action	Type	Old Value	New Value

Initial Analysis by NIST 6/19/2018 2:24:15 PM

Action	Type	Old Value	New Value
Added	CPE Configuration		OR *cpe:2.3:a:signal:signal-desktop:*:*:*:*:*:*:*:* versions up to (including) 1.10.1
Added	CVSS V2		(AV:N/AC:M/Au:N/C:N/I:P/A:N)
Added	CVSS V2 Metadata		Victim must voluntarily interact with attack mechanism
Added	CVSS V3		AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Added	CWE		CWE-79
Changed	Reference Type	http://seclists.org/fulldisclosure/2018/May/46 No Types Assigned	http://seclists.org/fulldisclosure/2018/May/46 Mailing List, Patch, Third Party Advisory

CVE Modified by MITRE 5/18/2018 9:29:00 PM

Action	Type	Old Value	New Value
Changed	Description	Record truncated, showing 500 of 1427 characters. View Entire Change Record Open Whisper Signal (aka Signal-Desktop) through 1.10.1 allows XSS via a resource location specified in an attribute of a SCRIPT, IFRAME, or IMG element, leading to JavaScript execution after a reply, a different vulnerability than CVE-2018-10994. The attacker needs to send HTML code directly as a message, and then reply to that message to trigger this vulnerability. The Signal-Desktop software fails to sanitize specific HTML elements that can be used to inject HTML code into remote chat windows	Record truncated, showing 500 of 1427 characters. View Entire Change Record Open Whisper Signal (aka Signal-Desktop) through 1.10.1 allows XSS via a resource location specified in an attribute of a SCRIPT, IFRAME, or IMG element, leading to JavaScript execution after a reply, a different vulnerability than CVE-2018-10994. The attacker needs to send HTML code directly as a message, and then reply to that message to trigger this vulnerability. The Signal-Desktop software fails to sanitize specific HTML elements that can be used to inject HTML code into remote chat windows