Information disclosure in firefox (Alpine package)



Published: 2020-08-30
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-15666
CWE-ID CWE-200
Exploitation vector Network
Public exploit N/A
Vulnerable software
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firefox (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: #VU46021

Risk: Low

CVSSv3.1: 3.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-15666

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 in an MediaError message. When trying to load a non-video in an audio/video context the exact status code (200, 302, 404, 500, 412, 403, etc.) was disclosed via the MediaError Message. This level of information leakage is inconsistent with the standardized onerror/onsuccess disclosure and can lead to inferring login status to services or device discovery on a local network among other attacks.

Mitigation

Install update from vendor's website.

Vulnerable software versions

firefox (Alpine package): 70.0-r0 - 79.0-r1

External links

http://git.alpinelinux.org/aports/commit/?id=ec7853eade2b7d671bc10bb748c69725d946a4fa


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.



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