CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
54.0%
Symfony versions >=2.0.0, <4.4.50, >= 5.0.0, < 5.4.20, >= 6.0.0, < 6.0.20, >= 6.1.0, < 6.1.12, and >= 6.2.0, < 6.2.6 of the Symfony Security Bundle are affected by this security issue.
The issue has been fixed in Symfony 4.4.50, 5.4.20, 6.0.20, 6.1.12, and 6.2.6. All other versions are not maintained anymore.
When authenticating users, Symfony regenerates the session ID upon login by default, but preserves the rest of session attributes. Because this does not clear CSRF tokens upon login, this might enables same-site attackers to bypass the CSRF protection mechanism by performing an attack similar to a session-fixation.
Symfony removes all CSRF tokens from the session on successful login.
The patch for this issue is available here for branch 4.4.
We would like to thank Marco Squarcina for reporting the issue and Nicolas Grekas for fixing it.
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Published in #Security Advisories
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
54.0%