Vulnerability DatabaseCVE-2018-11386
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CVE-2018-11386
Published:June 13, 2018
Updated:May 17, 2026
An issue was discovered in the HttpFoundation component in Symfony 2.7.x before 2.7.48, 2.8.x before 2.8.41, 3.3.x before 3.3.17, 3.4.x before 3.4.11, and 4.0.x before 4.0.11. The PDOSessionHandler class allows storing sessions on a PDO connection. Under some configurations and with a well-crafted payload, it was possible to do a denial of service on a Symfony application without too much resources.
Affected Packages
symfony/http-foundation (PHP):
Affected version(s) >=v2.7.0 <v2.7.48
Fix Suggestion:
Update to version v2.7.48
symfony/symfony (PHP):
Affected version(s) >=v2.7.0 <v2.7.48
Fix Suggestion:
Update to version v2.7.48
symfony/symfony (PHP):
Affected version(s) >=v2.8.0 <v2.8.41
Fix Suggestion:
Update to version v2.8.41
symfony/symfony (PHP):
Affected version(s) >=v3.4.0 <v3.4.11
Fix Suggestion:
Update to version v3.4.11
symfony/symfony (PHP):
Affected version(s) >=v3.3.0 <v3.3.17
Fix Suggestion:
Update to version v3.3.17
symfony/http-foundation (PHP):
Affected version(s) >=v3.4.0 <v3.4.11
Fix Suggestion:
Update to version v3.4.11
symfony/symfony (PHP):
Affected version(s) >=v4.0.0 <v4.0.11
Fix Suggestion:
Update to version v4.0.11
symfony/http-foundation (PHP):
Affected version(s) >=v3.3.0 <v3.3.17
Fix Suggestion:
Update to version v3.3.17
symfony/http-foundation (PHP):
Affected version(s) >=v2.8.0 <v2.8.41
Fix Suggestion:
Update to version v2.8.41
symfony/http-foundation (PHP):
Affected version(s) >=v4.0.0 <v4.0.11
Fix Suggestion:
Update to version v4.0.11
Related Resources (13)
https://nvd.nist.gov/vuln/detail/CVE-2018-11386
https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/http-foundation/CVE-2018-11386.yaml
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UBQK7JDXIELADIPGZIOUCZKMAJM5LSBW
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/G4XNBMFW33H47O5TZGA7JYCVLDBCXAJV
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UBQK7JDXIELADIPGZIOUCZKMAJM5LSBW/
https://symfony.com/blog/cve-2018-11386-denial-of-service-when-using-pdosessionhandler
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/G4XNBMFW33H47O5TZGA7JYCVLDBCXAJV/
https://symfony.com/cve-2018-11386
https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2018-11386.yaml
https://github.com/symfony/symfony
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WU5N2TZFNGXDGMXMPP7LZCWTFLENF6WH
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WU5N2TZFNGXDGMXMPP7LZCWTFLENF6WH/
https://www.debian.org/security/2018/dsa-4262
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CVSS v4
Base Score:
8.2
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.9
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Insufficient Session Expiration
CWE-613
EPSS
Base Score:
1.09