CVE-2019-11763

EUVD-2019-3433
Failure to correctly handle null bytes when processing HTML entities resulted in Firefox incorrectly parsing these entities. This could have led to HTML comment text being treated as HTML which could have led to XSS in a web application under certain conditions. It could have also led to HTML entities being masked from filters - enabling the use of entities to mask the actual characters of interest from filters. This vulnerability affects Firefox < 70, Thunderbird < 68.2, and Firefox ESR < 68.2.
Cross-site Scripting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.1 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 84%
Affected Products (NVD)
VendorProductVersion
mozillafirefox
𝑥
< 70.0
mozillafirefox_esr
𝑥
< 68.2
mozillathunderbird
𝑥
< 68.2
canonicalubuntu_linux
16.04
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
firefox
sid
132.0.1-1
fixed
firefox-esr
bookworm
115.14.0esr-1~deb12u1
fixed
bookworm (security)
128.4.0esr-1~deb12u1
fixed
bullseye
115.14.0esr-1~deb11u1
fixed
bullseye (security)
128.4.0esr-1~deb11u1
fixed
sid
128.4.0esr-1
fixed
trixie
128.3.1esr-2
fixed
thunderbird
bookworm
1:115.12.0-1~deb12u1
fixed
bookworm (security)
1:115.16.0esr-1~deb12u1
fixed
bullseye
1:115.12.0-1~deb11u1
fixed
bullseye (security)
1:128.4.0esr-1~deb11u1
fixed
sid
1:128.4.0esr-1
fixed
trixie
1:128.4.0esr-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
firefox
bionic
Fixed 70.0+build2-0ubuntu0.18.04.1
released
disco
Fixed 70.0+build2-0ubuntu0.19.04.1
released
eoan
Fixed 70.0+build2-0ubuntu0.19.10.1
released
focal
Fixed 70.0+build2-0ubuntu1
released
groovy
Fixed 70.0+build2-0ubuntu1
released
hirsute
Fixed 70.0+build2-0ubuntu1
released
impish
Fixed 70.0+build2-0ubuntu1
released
jammy
Fixed 70.0+build2-0ubuntu1
released
kinetic
Fixed 70.0+build2-0ubuntu1
released
lunar
Fixed 70.0+build2-0ubuntu1
released
mantic
Fixed 70.0+build2-0ubuntu1
released
noble
Fixed 70.0+build2-0ubuntu1
released
trusty
dne
xenial
Fixed 70.0+build2-0ubuntu0.16.04.1
released
mozjs38
bionic
ignored
disco
dne
eoan
dne
focal
dne
groovy
dne
hirsute
dne
impish
dne
jammy
dne
kinetic
dne
lunar
dne
mantic
dne
noble
dne
trusty
dne
xenial
dne
mozjs52
bionic
ignored
disco
ignored
eoan
ignored
focal
ignored
groovy
ignored
hirsute
dne
impish
dne
jammy
dne
kinetic
dne
lunar
dne
mantic
dne
noble
dne
trusty
dne
xenial
dne
mozjs60
bionic
dne
disco
ignored
eoan
ignored
focal
dne
groovy
dne
hirsute
dne
impish
dne
jammy
dne
kinetic
dne
lunar
dne
mantic
dne
noble
dne
trusty
dne
xenial
dne
thunderbird
bionic
Fixed 1:68.2.1+build1-0ubuntu0.18.04.1
released
disco
ignored
eoan
Fixed 1:68.2.1+build1-0ubuntu0.19.10.1
released
focal
Fixed 1:68.2.0+build1.1-0ubuntu1
released
groovy
Fixed 1:68.2.0+build1.1-0ubuntu1
released
hirsute
Fixed 1:68.2.0+build1.1-0ubuntu1
released
impish
Fixed 1:68.2.0+build1.1-0ubuntu1
released
jammy
Fixed 1:68.2.0+build1.1-0ubuntu1
released
kinetic
Fixed 1:68.2.0+build1.1-0ubuntu1
released
lunar
Fixed 1:68.2.0+build1.1-0ubuntu1
released
mantic
Fixed 1:68.2.0+build1.1-0ubuntu1
released
noble
Fixed 1:68.2.0+build1.1-0ubuntu1
released
trusty
dne
xenial
Fixed 1:68.7.0+build1-0ubuntu0.16.04.2
released