CVE-2021-21424 — Sensitive Information Exposure in Symfony

CWE-200 — Sensitive Information ExposureCWE-203 — Observable Discrepancy8 documents6 sources
Severity
5.3MEDIUMNVD
EPSS
0.3%
top 49.89%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
9
SymfonySensiolabs SymfonyLexik Jwt-authentication-bundle+6 more
Timeline
PublishedMay 13
Latest updateAug 24

Description

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. The ability to enumerate users was possible without relevant permissions due to different handling depending on whether the user existed or not when attempting to use the switch users functionality. We now ensure that 403s are returned whether the user exists or not if a user cannot switch to a user or if the user does not exist. The patch for this issue is available for branch 3.4.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:NExploitability: 3.9 | Impact: 1.4

Affected Packages11 packages

▶Packagistsymfony/symfony2.8.0 — 3.4.49+2
▶Packagistsymfony/security5.0.0 — 5.2.8+2
▶NVDsensiolabs/symfony2.8.0 — 3.4.48+2
▶Packagistsymfony/maker-bundle1.27.0 — 1.29.2+1
▶Packagistsymfony/security-core2.8.0 — 3.4.48+2

Also affects: Fedora 33, 34

Patches

Patch: github.com ↗Patch: github.com ↗Patch: github.com ↗

🔴Vulnerability Details

5
OSV
symfony vulnerabilities↗2022-08-24
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GHSA
Prevent user enumeration using Guard or the new Authenticator-based Security↗2021-05-13
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OSV
Prevent user enumeration using Guard or the new Authenticator-based Security↗2021-05-13
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CVEList
Prevent user enumeration using Guard or the new Authenticator-based Security↗2021-05-13
▶
OSV
CVE-2021-21424: Symfony is a PHP framework for web and console applications and a set of reusable PHP components↗2021-05-13
▶

📋Vendor Advisories

2
Ubuntu
Symfony vulnerabilities↗2022-08-24
▶
Debian
CVE-2021-21424: symfony - Symfony is a PHP framework for web and console applications and a set of reusabl...↗2021
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CVE-2021-21424 — Sensitive Information Exposure | cvebase