Information disclosure in firefox (Alpine package)

1) Information disclosure

EUVDB-ID: #VU47743

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-2020-15680

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

Exploit availability: No

Description

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

The vulnerability exists due to the way Firefox handles image tags. A remote attacker can use a specially crafted image tag to reference protocol handlers and depending on the response to determine if the requested external protocol handler is registered on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

firefox (Alpine package): 76.0.1-r1 - 77.0.1-r4

CPE2.3

• cpe:2.3:a:alpine:firefox_alpine_package:76.0.1-r1:*:*:*:*:alpine_linux:*:3.12
• cpe:2.3:a:alpine:firefox_alpine_package:77.0-r0:*:*:*:*:alpine_linux:*:3.12
• cpe:2.3:a:alpine:firefox_alpine_package:77.0.1-r0:*:*:*:*:alpine_linux:*:3.12

External links

https://git.alpinelinux.org/aports/commit/?id=13a8f0d1284680f721e935cc6d3cb2649cf25093

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.