Prevent cache poisoning via a Response Content-Type header
CVE-2020-5255

2.6LOW

Key Information:

Vendor
Symfony
Status
Symfony
Vendor
CVE Published:
30 March 2020

Summary

In Symfony before versions 4.4.7 and 5.0.7, when a Response does not contain a Content-Type header, affected versions of Symfony can fallback to the format defined in the Accept header of the request, leading to a possible mismatch between the response's content and Content-Type header. When the response is cached, this can prevent the use of the website by other users. This has been patched in versions 4.4.7 and 5.0.7.

Affected Version(s)

symfony >= 4.4.0 and < 4.4.7 < 4.4.0 and 4.4.7

symfony >= 5.0.0 and < 5.0.7 < 5.0.0 and 5.0.7

References

https://github.com/symfony/symfony/security/advisories/GH...
x_refsource_CONFIRM
https://github.com/symfony/symfony/commit/dca343442e6a954...
x_refsource_MISC
https://symfony.com/blog/cve-2020-5255-prevent-cache-pois...
x_refsource_MISC

CVSS V3.1

Score:
2.6
Severity:
LOW
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.