Vulnerability Monitor

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CVE-2017-18343

The debug handler in Symfony before v2.7.33, 2.8.x before v2.8.26, 3.x before v3.2.13, and 3.3.x before v3.3.6 has XSS via an array key during exception pretty printing in ExceptionHandler.php, as demonstrated by a /_debugbar/open?op=get URI. NOTE: the vendor's position is that this is not a vulnerability because the debug tools are not intended for production use. NOTE: the Symfony Debug component is used by Laravel Debugbar

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 6.1, indicating it can be exploited remotely over the network with relatively low complexity though user interaction is required and does not require pre-existing privileges . The vulnerability impacts limited data confidentiality, limited integrity, for affected systems. Impacting 1 product from sensiolabs organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2018, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2018-07-20T00:29:00.237

Last Modified

2024-11-21T03:19:53.190

Status

Modified

Source

[email protected]

Severity

CVSSv3.0: 6.1 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:N/I:P/A:N

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: PARTIAL
Availability Impact: NONE

Exploitability Score

8.6

Impact Score

2.9

Weaknesses

Type: Primary
CWE-79

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	sensiolabs	symfony	< 2.7.33	Yes
Application	sensiolabs	symfony	< 2.8.26	Yes
Application	sensiolabs	symfony	< 3.2.13	Yes
Application	sensiolabs	symfony	< 3.3.6	Yes

References

https://github.com/barryvdh/laravel-debugbar/issues/850 Exploit, Third Party Advisory ([email protected])
https://github.com/symfony/debug/pull/7/commits/e48bda29143bd1a83001780b4a78e483822d985c Patch, Third Party Advisory ([email protected])
https://github.com/symfony/symfony/issues/27987 Exploit, Third Party Advisory ([email protected])
https://github.com/symfony/symfony/pull/23684 Third Party Advisory ([email protected])
https://github.com/barryvdh/laravel-debugbar/issues/850 Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/symfony/debug/pull/7/commits/e48bda29143bd1a83001780b4a78e483822d985c Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/symfony/symfony/issues/27987 Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/symfony/symfony/pull/23684 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For sensiolabs's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.