Insufficient Session Expiration in Symfony - CVE-2018-11386
Published: June 13, 2018 / Updated: July 17, 2020
Vulnerability identifier: #VU31282
CSH Severity: Medium
CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2018-11386
CWE-ID: CWE-613
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
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 software
Symfony
Fedora
php-symfony
php-symfony3
php-symfony4
Fedora
php-symfony
php-symfony3
php-symfony4
How to mitigate CVE-2018-11386
Install update from vendor's website.
Symfony - update to 4.0.11
php-symfony - addressed in versions 2.8.41-1.fc28, 2.8.42-1.fc27
php-symfony3 - addressed in versions 3.3.17-1.fc27, 3.4.11-1.fc28
php-symfony4 - update to 4.0.11-1.fc28
php-symfony - addressed in versions 2.8.41-1.fc28, 2.8.42-1.fc27
php-symfony3 - addressed in versions 3.3.17-1.fc27, 3.4.11-1.fc28
php-symfony4 - update to 4.0.11-1.fc28
External References
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/G4XNBMFW33H47O5TZGA7JYCVLDBCXAJV/
- 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/WU5N2TZFNGXDGMXMPP7LZCWTFLENF6WH/
- https://symfony.com/blog/cve-2018-11386-denial-of-service-when-using-pdosessionhandler
- https://www.debian.org/security/2018/dsa-4262