CVE-2020-6813

When protecting CSS blocks with the nonce feature of Content Security Policy, the @import statement in the CSS block could allow an attacker to inject arbitrary styles, bypassing the intent of the Content Security Policy. This vulnerability affects Firefox < 74.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
5.3 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
mozillaCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 29%
VendorProductVersion
mozillafirefox
𝑥
< 74.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
firefox
sid
132.0.1-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
firefox
noble
Fixed 74.0+build3-0ubuntu1
released
mantic
Fixed 74.0+build3-0ubuntu1
released
lunar
Fixed 74.0+build3-0ubuntu1
released
kinetic
Fixed 74.0+build3-0ubuntu1
released
jammy
Fixed 74.0+build3-0ubuntu1
released
impish
Fixed 74.0+build3-0ubuntu1
released
hirsute
Fixed 74.0+build3-0ubuntu1
released
groovy
Fixed 74.0+build3-0ubuntu1
released
focal
Fixed 74.0+build3-0ubuntu1
released
eoan
Fixed 74.0+build3-0ubuntu0.19.10.1
released
bionic
Fixed 74.0+build3-0ubuntu0.18.04.1
released
xenial
Fixed 74.0+build3-0ubuntu0.16.04.1
released
trusty
dne
mozjs38
noble
dne
mantic
dne
lunar
dne
kinetic
dne
jammy
dne
impish
dne
hirsute
dne
groovy
dne
focal
dne
eoan
dne
bionic
ignored
xenial
dne
trusty
dne
mozjs52
noble
dne
mantic
dne
lunar
dne
kinetic
dne
jammy
dne
impish
dne
hirsute
dne
groovy
ignored
focal
ignored
eoan
ignored
bionic
ignored
xenial
dne
trusty
dne
mozjs60
noble
dne
mantic
dne
lunar
dne
kinetic
dne
jammy
dne
impish
dne
hirsute
dne
groovy
dne
focal
dne
eoan
ignored
bionic
dne
xenial
dne
trusty
dne