Universal XSS in Apple watchOS



Published: 2021-03-26
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2021-1879
CWE ID CWE-79
Exploitation vector Network
Public exploit This vulnerability is being exploited in the wild.
Vulnerable software
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watchOS
Operating systems & Components / Operating system

Vendor Apple Inc.

Security Advisory

This security advisory describes one medium risk vulnerability.

1) Universal cross-site scripting

Risk: High

CVSSv3.1: 5.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:H/RL:O/RC:C] [PCI]

CVE-ID: CVE-2021-1879

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 WebKit engine. 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 arbitrary 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.

Note, the vulnerability is being actively exploited in the wild.

Mitigation

Install update from vendor's website.

Vulnerable software versions

watchOS: 7.0 18R382, 7.0.1 18R395, 7.0.2 18R402, 7.0.3 18R410, 7.1 18R590, 7.2 18S564, 7.3 18S801, 7.3.1 18S811, 7.3.2 18S821

CPE External links

https://support.apple.com/en-us/HT212258

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?

Yes. This vulnerability is being exploited in the wild.



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