CVE-2020-12391 — Incorrect Authorization in Mozilla Firefox

CWE-863 — Incorrect AuthorizationCWE-20 — Improper Input ValidationCWE-358 — Improperly Implemented Security Check for Standard11 documents8 sources
Severity
7.5HIGHNVD
OSV8.1
EPSS
0.7%
top 28.03%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Mozilla FirefoxDebian Firefox
Timeline
PublishedMay 26
Latest updateMay 24

Description

Documents formed using data: URLs in an OBJECT element failed to inherit the CSP of the creating context. This allowed the execution of scripts that should have been blocked, albeit with a unique opaque origin. This vulnerability affects Firefox < 76.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:NExploitability: 3.9 | Impact: 3.6

Affected Packages5 packages

▶debiandebian/firefox< firefox 76.0-1 (sid)
▶CVEListV5mozilla/firefoxunspecified — 76
▶NVDmozilla/firefox< 76.0
▶Ubuntumozilla/firefox< 76.0.1+build1-0ubuntu0.16.04.1+5
▶mozillamozilla/firefox

🔴Vulnerability Details

4
GHSA
GHSA-cxc7-m7pw-q6p7: Documents formed using data: URLs in an OBJECT element failed to inherit the CSP of the creating context↗2022-05-24
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OSV
firefox regression↗2020-05-12
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OSV
CVE-2020-12391: Documents formed using data: URLs in an OBJECT element failed to inherit the CSP of the creating context↗2020-05-07
▶
OSV
firefox vulnerabilities↗2020-05-07
▶

📋Vendor Advisories

5
Ubuntu
Firefox regression↗2020-05-12
▶
Ubuntu
Firefox vulnerabilities↗2020-05-07
▶
Red Hat
Mozilla: Content-Security-Policy bypass using object elements↗2020-05-05
▶
Debian
CVE-2020-12391: firefox - Documents formed using data: URLs in an OBJECT element failed to inherit the CSP...↗2020
▶
Mozilla
Mozilla Foundation Security Advisory 2020-16: CVE-2020-12391↗
▶

💬Community

1
Bugzilla
CVE-2020-12391 Mozilla: Content-Security-Policy bypass using object elements↗2020-05-12
▶