Information disclosure in firefox-esr (Alpine package)

Published: 2021-02-26
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-23973
Exploitation vector Network
Public exploit N/A
Vulnerable software
firefox-esr (Alpine package)
Operating systems & Components / Operating system package or component

Vendor Alpine Linux Development Team

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Information disclosure

EUVDB-ID: #VU50888

Risk: Low


CVE-ID: CVE-2021-23973


Exploit availability:


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

The vulnerability exists due to excessive data output via a decoding error, when trying to load a cross-origin resource in an audio/video context. A remote attacker can gain access to information about the resource.


Install update from vendor's website.

Vulnerable software versions

firefox-esr (Alpine package): 60.4.0-r0 - 78.7.1-r0

Fixed software versions

CPE2.3 External links

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?