CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
78.7%
Symfony 3.4.0 to 3.4.34, 4.2.0 to 4.2.11 and 4.3.0 to 4.3.7 versions of the Symfony Cache component are affected by this security issue.
The issue has been fixed in Symfony 3.4.35, 4.2.12 and 4.3.8.
Note that no fixes are provided for Symfony 3.1, 3.2, 3.3, 4.0 and 4.1 as they are not maintained anymore.
When an instance of TagAwareAdapter
is destructed, Symfony execute callables stored in privates properties in order to invalidates tags. When the instance has been created by unserializing an external payload, those properties are not checked leading to a remote code execution.
Serializing and Unserializing of AbstractAdapter
and TagAwareAdapter
is now forbidden.
The patch for this issue is available here for branch 4.2.
I would like to thank wisdomtree for reporting & Nicolas Grekas for fixing the issue.
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Published in #Security Advisories
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
78.7%