CVE-2019-18886

An issue was discovered in Symfony 4.2.0 to 4.2.11 and 4.3.0 to 4.3.7. The ability to enumerate users was possible due to different handling depending on whether the user existed when making unauthorized attempts to use the switch users functionality. This is related to symfony/security.
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:L/I:N/A:N
mitreCNA
---
---
CVEADP
---
---
Base Score
CVSS 3.x
EPSS Score
Percentile: 80%
VendorProductVersion
sensiolabssymfony
4.2.0 ≤
𝑥
≤ 4.2.11
sensiolabssymfony
4.3.0 ≤
𝑥
≤ 4.3.7
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
symfony
bullseye
4.4.19+dfsg-2+deb11u6
fixed
buster
not-affected
stretch
not-affected
bookworm
5.4.23+dfsg-1+deb12u2
fixed
sid
6.4.13+dfsg-1
fixed
trixie
6.4.13+dfsg-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
symfony
jammy
not-affected
impish
not-affected
hirsute
not-affected
groovy
not-affected
focal
not-affected
eoan
ignored
disco
ignored
bionic
not-affected
xenial
not-affected
trusty
dne
Common Weakness Enumeration
References
https://github.com/symfony/symfony/releases/tag/v4.3.8
https://symfony.com/blog/cve-2019-18886-prevent-user-enumeration-using-switch-user-functionality
https://symfony.com/blog/symfony-4-3-8-released
https://github.com/symfony/symfony/releases/tag/v4.3.8
https://symfony.com/blog/cve-2019-18886-prevent-user-enumeration-using-switch-user-functionality
https://symfony.com/blog/symfony-4-3-8-released